{"title":"ARCOAIRE \"ADD-ON\" Central Heat Pump | Installation in Greater Montreal \u0026 Montérégie","description":null,"products":[{"product_id":"thermopompe-centrale-add-on-arcoaire-compact-quiet-comfort-1-5-tonnes-18000-btu-serpentin-dlfula-17-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE Compact Quiet Comfort | 1.5 Tons - 18,000 BTU (Coil DLFULA 17.5 in.) - R410A","description":"\u003ch2\u003eAdd a heat pump to your electric furnace without replacing it\u003c\/h2\u003e\u003cp\u003eYour \u003cstrong\u003eelectric furnace\u003c\/strong\u003e is in good condition, but you want air conditioning in summer and a more efficient heat source for most of the winter. The \u003cstrong\u003eADD-ON\u003c\/strong\u003e approach answers exactly that: a coil is installed on the existing furnace, an outdoor unit is added outside, and the heat pump heats and cools through the same \u003cstrong\u003educts\u003c\/strong\u003e. The furnace stays in place and its electric elements only serve as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE Compact Quiet Comfort | 1.5 Tons - 18,000 BTU (Coil DLFULA 17.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eDLCURAH18ABK\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eDLFULAH24XBX\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eIts certified ratings are \u003cstrong\u003e16.1 SEER2\u003c\/strong\u003e, \u003cstrong\u003e11.7 EER2\u003c\/strong\u003e and \u003cstrong\u003e9.5 HSPF2\u003c\/strong\u003e. The system is \u003cstrong\u003eENERGY STAR\u003c\/strong\u003e certified with the \u003cstrong\u003ecold-climate designation\u003c\/strong\u003e under \u003cstrong\u003eENERGY STAR ID 2841437\u003c\/strong\u003e, its certificate still lists capacity at \u003cstrong\u003e-30 °C\u003c\/strong\u003e, and it qualifies for a \u003cstrong\u003e$1,764 LogisVert grant\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eHow the ADD-ON approach works\u003c\/h3\u003e\u003cp\u003eA central electric furnace already has everything needed to distribute air: a blower, a plenum and a duct system. The ADD-ON approach builds on these. The heat pump coil sits on the furnace's air outlet; when the heat pump runs, the furnace blower pushes air through that coil, which warms it in winter and cools it in summer.\u003c\/p\u003e\u003cp\u003eThe heat pump thus takes over the cooling and most of the heating. The furnace's electric elements stay ready to provide backup heat during deep cold. There is no unit to remove and no indoor unit to fit: only a coil, a line set, an outdoor unit and a suitable thermostat.\u003c\/p\u003e\u003ch3\u003eWhich homes the 1.5-ton size suits\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e1.5-ton\u003c\/strong\u003e size, or \u003cstrong\u003e18,000 BTU\/h\u003c\/strong\u003e, is meant for compact homes heated by an electric furnace: a townhouse, a small bungalow, a semi-detached house in \u003cstrong\u003eLongueuil\u003c\/strong\u003e or on the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e. These are often homes without central air conditioning, where a window unit had to do.\u003c\/p\u003e\u003cp\u003eFor an ADD-ON system, the size is chosen first according to cooling needs, then according to the share of heating the heat pump will be able to take on. An oversized unit would cool in bursts and remove moisture poorly. The room-by-room load calculation accounts for insulation, windows and orientation; we do it before proposing a size.\u003c\/p\u003e\u003ch3\u003eA 17.5 in. coil matched to the furnace\u003c\/h3\u003e\u003cp\u003eThe width shown in the title, \u003cstrong\u003e17.5 in.\u003c\/strong\u003e, is the coil's width. It must match the width of the furnace's air outlet so that air passes through the whole coil without bypassing its edges. It is a common width for residential furnaces, but we always measure on site before confirming the model.\u003c\/p\u003e\u003cp\u003eThe coil fits between the furnace and the supply plenum. Depending on the height available in the mechanical room, the plenum is adjusted or rebuilt. A condensate drain is connected to the coil, since it produces water in cooling mode.\u003c\/p\u003e\u003ch3\u003eWhich unit heats, and when\u003c\/h3\u003e\u003cp\u003eA compatible thermostat decides when the heat pump heats on its own and when the electric furnace's elements come into play. As long as the heat pump holds the set point, it heats alone. When it is no longer enough, in deep cold, the thermostat brings in the electric elements as auxiliary heat, then takes them out as soon as the heat pump is enough again.\u003c\/p\u003e\u003cp\u003eThe moment the backup comes in is set according to the heat pump's capacity, the home's heat loss and your comfort preferences. We set it during commissioning and explain how it works.\u003c\/p\u003e\u003ch3\u003eWhat the certificate lists for winter\u003c\/h3\u003e\u003cp\u003eThe certificate lists \u003cstrong\u003e14,700 BTU\/h at -8 °C\u003c\/strong\u003e (17 °F) with a \u003cstrong\u003eCOP of 2.60\u003c\/strong\u003e, and \u003cstrong\u003e15,000 BTU\/h at -15 °C\u003c\/strong\u003e (5 °F) with a \u003cstrong\u003eCOP of 2.20\u003c\/strong\u003e, about 83% of the nominal size. The two points are measured separately; we report each one as published. At \u003cstrong\u003e-30 °C\u003c\/strong\u003e, the certificate still lists \u003cstrong\u003e12,500 BTU\/h\u003c\/strong\u003e with a \u003cstrong\u003eCOP of 1.80\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThese figures come from certificate \u003cstrong\u003eAHRI 213372116\u003c\/strong\u003e, published by NEEP. In a small, well-insulated home in \u003cstrong\u003eMontreal\u003c\/strong\u003e, they leave a large part of the heating season to the heat pump; the furnace's elements step in mainly during cold snaps.\u003c\/p\u003e\u003ch3\u003eThe ratings and what they mean\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003e9.5 HSPF2\u003c\/strong\u003e: the heat pump's efficiency over the whole heating season.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eCOP\u003c\/strong\u003e: heat delivered divided by energy used. An electric furnace's elements never deliver more heat than the electricity they receive; at -8 °C, the heat pump delivers more than two and a half times, as heat, the electricity it uses.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003e16.1 SEER2\u003c\/strong\u003e: cooling efficiency over a typical summer.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003e11.7 EER2\u003c\/strong\u003e: cooling efficiency at full load, on a hot day.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eCooling, on top of heating\u003c\/h3\u003e\u003cp\u003eIn summer, the heat pump cools every room served by the ducts, upstairs bedrooms included, with no window units. Its \u003cstrong\u003evariable-speed\u003c\/strong\u003e (\u003cstrong\u003einverter\u003c\/strong\u003e) compressor slows down as it approaches the set point and runs for long periods at low speed, which removes moisture from the air. The system runs on \u003cstrong\u003eR-410A\u003c\/strong\u003e, a refrigerant that refrigeration technicians know well.\u003c\/p\u003e\u003ch3\u003eThe $1,764 LogisVert grant\u003c\/h3\u003e\u003cp\u003eThe system is listed in Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e program, with \u003cstrong\u003e$1,764\u003c\/strong\u003e for the owner of an existing home, according to the list in effect on the installation date. The amount corresponds to the certified pairing of the DLCURAH18ABK outdoor unit and the DLFULAH24XBX coil.\u003c\/p\u003e\u003cp\u003eWe confirm eligibility before signing and prepare the detailed invoice, model numbers and proof of payment. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003eefficient heat pump grant\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003ch3\u003eChecking the furnace, then installing\u003c\/h3\u003e\u003cp\u003eAn ADD-ON system only makes sense if the electric furnace is in good condition. During the visit, we check its age and general condition, its blower and the airflow it can deliver, the filter, its heating elements and their electrical connections, and the space above the unit. We also examine the duct sizes and the air return. If the furnace is nearing the end of its life, we tell you and present other options.\u003c\/p\u003e\u003cp\u003eOn installation day, the coil is mounted on the furnace and connected to the condensate drain. The outdoor unit goes on a wall bracket or a stand, \u003cstrong\u003eabove the snow line\u003c\/strong\u003e, away from roof drip. The insulated copper line set is brazed, pressure-tested and put under vacuum. The outdoor unit is connected on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e, with an outdoor disconnect, and the thermostat is replaced with a model that manages the heat pump and the furnace's electric backup. Commissioning checks the charge, airflow, defrost and the backup setting.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eThe furnace filter now serves both units: check it every month in season and replace it according to its format. Keep the outdoor unit clear of snow and leaves, without covering it. Plan annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance that covers the heat pump's coil, condensate drain and electrical connections, as well as a check of the electric furnace and its elements. In winter, the white vapour during defrost is normal.\u003c\/p\u003e\u003ch3\u003eWarranty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE Compact Quiet Comfort | 1.5 Tons - 18,000 BTU (Coil DLFULA 17.5 in.) - R410A. We check your furnace, assess the home room by room and confirm your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67797822931236,"sku":"DLCURAH18ABK","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_DLCURA_1_5_TONNES_18000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082528"},{"product_id":"thermopompe-centrale-add-on-arcoaire-compact-quiet-comfort-2-tonnes-24000-btu-serpentin-dlfula-14-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE Compact Quiet Comfort | 2 Tons - 24,000 BTU (Coil DLFULA 14.5 in.) - R410A","description":"\u003ch2\u003eA heat pump on a narrow electric furnace, even when space is tight\u003c\/h2\u003e\u003cp\u003eIn townhouses and small homes, the \u003cstrong\u003eelectric furnace\u003c\/strong\u003e often sits in a closet or a corner of the basement where every inch counts. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE Compact Quiet Comfort | 2 Tons - 24,000 BTU (Coil DLFULA 14.5 in.) - R410A\u003c\/strong\u003e is designed for these narrow furnaces. It pairs the \u003cstrong\u003eDLCURAH24ABK\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eDLFULAH24XAX\u003c\/strong\u003e coil, which is installed on the existing furnace; the heat pump heats and cools through the same \u003cstrong\u003educts\u003c\/strong\u003e, and the furnace's elements only serve as backup.\u003c\/p\u003e\u003cp\u003eIts certified ratings are \u003cstrong\u003e16.1 SEER2\u003c\/strong\u003e, \u003cstrong\u003e10.7 EER2\u003c\/strong\u003e and \u003cstrong\u003e9.8 HSPF2\u003c\/strong\u003e. The system is \u003cstrong\u003eENERGY STAR\u003c\/strong\u003e certified with the \u003cstrong\u003ecold-climate designation\u003c\/strong\u003e under \u003cstrong\u003eENERGY STAR ID 2841438\u003c\/strong\u003e, its certificate still lists capacity at \u003cstrong\u003e-25 °C\u003c\/strong\u003e, and it qualifies for a \u003cstrong\u003e$2,688 LogisVert grant\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eThe 14.5 in. coil and the ADD-ON approach\u003c\/h3\u003e\u003cp\u003eIn an \u003cstrong\u003eADD-ON\u003c\/strong\u003e system, the electric furnace keeps its role as blower, and its elements become the backup heat. The heat pump coil sits on its air outlet: when the heat pump runs, the furnace blower pushes air through that coil, which warms it in winter and cools it in summer.\u003c\/p\u003e\u003cp\u003eFor all the air to pass through the coil, its width must match the furnace's. The \u003cstrong\u003e14.5 in.\u003c\/strong\u003e coil is meant for narrow furnaces, common in compact homes. The same system is also available with a wider coil for larger furnaces; we measure your unit on site before confirming the model.\u003c\/p\u003e\u003ch3\u003eThe homes it is meant for\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e2-ton\u003c\/strong\u003e size, or \u003cstrong\u003e24,000 BTU\/h\u003c\/strong\u003e, often suits a townhouse on two or three levels, a bungalow with a basement or a semi-detached house in \u003cstrong\u003eLaval\u003c\/strong\u003e or on the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e, heated by an electric furnace still in good condition. These homes have often never had central air conditioning, for lack of space for another unit.\u003c\/p\u003e\u003cp\u003eThe size is confirmed by a room-by-room load calculation that accounts for insulation, windows and orientation. In an ADD-ON system, we choose the size first for cooling, then check the share of heating the heat pump will be able to take on before the furnace's elements take over.\u003c\/p\u003e\u003ch3\u003eWhy keep the furnace\u003c\/h3\u003e\u003cp\u003eKeeping an electric furnace in good condition as backup has several advantages. Its elements already do the backup work, so there are no heating elements to add: only the outdoor unit needs a new circuit, which spares the capacity of the electrical panel, often limited in a townhouse. The work involves the heat pump only, since the furnace, the plenum and the ducts stay in place. Finally, the home keeps two heat sources to get through deep cold: the heat pump for most of the winter, the furnace's elements for the harshest nights.\u003c\/p\u003e\u003ch3\u003eA certificate that stops at -25 °C\u003c\/h3\u003e\u003cp\u003eThe certificate lists \u003cstrong\u003e22,400 BTU\/h at -8 °C\u003c\/strong\u003e (17 °F) with a \u003cstrong\u003eCOP of 2.42\u003c\/strong\u003e, about 93% of the nominal size, and \u003cstrong\u003e20,000 BTU\/h at -15 °C\u003c\/strong\u003e (5 °F) with a \u003cstrong\u003eCOP of 2.00\u003c\/strong\u003e. The two points are measured separately; we report each one as published. Its coldest point is \u003cstrong\u003e-25 °C\u003c\/strong\u003e, where it lists \u003cstrong\u003e16,500 BTU\/h\u003c\/strong\u003e with a \u003cstrong\u003eCOP of 1.61\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThat last point deserves an explanation. The certificate does not list any colder data, and we do not guess it. In an ADD-ON system, this is hardly an issue: the electric furnace is there for the coldest nights of a \u003cstrong\u003eMontreal\u003c\/strong\u003e winter. The thermostat brings its elements in as backup as soon as the heat pump can no longer hold the set point. These figures come from certificate \u003cstrong\u003eAHRI 213372117\u003c\/strong\u003e, published by NEEP.\u003c\/p\u003e\u003ch3\u003eThe thermostat and the electric backup\u003c\/h3\u003e\u003cp\u003eA compatible thermostat hands the heating to the heat pump first. When, in deep cold, it can no longer hold the set point, the thermostat brings in the electric furnace's elements as auxiliary heat, then takes them out as soon as the heat pump is enough again.\u003c\/p\u003e\u003cp\u003eThe backup setting depends on the heat pump's capacity, the home's heat loss and your preferences. Backup that comes in too early runs the elements when the heat pump would be enough; backup that comes in too late can leave the house cool in deep cold. We set it during commissioning and adjust it if needed after the first weeks of winter.\u003c\/p\u003e\u003ch3\u003eWhat the ratings measure\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003e9.8 HSPF2\u003c\/strong\u003e: the heat pump's efficiency over the whole heating season.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eCOP of 2.42 at -8 °C\u003c\/strong\u003e: heat delivered divided by electricity used. An electric furnace's elements never deliver more heat than the electricity they receive; the heat pump delivers nearly two and a half times as much here.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003e16.1 SEER2\u003c\/strong\u003e: cooling efficiency over a typical summer.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003e10.7 EER2\u003c\/strong\u003e: cooling efficiency at full load, on a hot day.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eAir conditioning, at last\u003c\/h3\u003e\u003cp\u003eIn summer, the heat pump cools every room served by the ducts, including the top-floor bedrooms of a townhouse, often the warmest. Its \u003cstrong\u003evariable-speed\u003c\/strong\u003e (\u003cstrong\u003einverter\u003c\/strong\u003e) compressor slows down as it approaches the set point and runs for long periods at low speed, which removes moisture instead of only cooling the air. The system runs on \u003cstrong\u003eR-410A\u003c\/strong\u003e, a refrigerant that refrigeration technicians know well.\u003c\/p\u003e\u003ch3\u003eThe $2,688 LogisVert grant\u003c\/h3\u003e\u003cp\u003eThe system is listed in Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e program, with \u003cstrong\u003e$2,688\u003c\/strong\u003e for the owner of an existing home, according to the list in effect on the installation date. The amount corresponds to the certified pairing of the DLCURAH24ABK outdoor unit and the DLFULAH24XAX coil.\u003c\/p\u003e\u003cp\u003eWe confirm eligibility before signing and prepare the detailed invoice, model numbers and proof of payment. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003eefficient heat pump grant\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003ch3\u003eInstalling in a tight space\u003c\/h3\u003e\u003cp\u003eBefore the quote, we check the condition of the electric furnace and its elements, its age, its blower and the airflow it can deliver, along with the duct sizes and the air return. In a mechanical closet, we also measure the height available above the unit: the coil fits between the furnace and the plenum, which is adjusted or rebuilt as needed. If the coil cannot drain by gravity to a floor drain, a condensate pump is included.\u003c\/p\u003e\u003cp\u003eThe insulated copper line set follows the most discreet route possible to the outdoor unit, mounted on a wall bracket or a stand, \u003cstrong\u003eabove the snow line\u003c\/strong\u003e, away from roof drip. It is brazed, pressure-tested and put under vacuum. The outdoor unit is connected on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e, with an outdoor disconnect, and the thermostat is replaced with a model that manages the heat pump and the furnace's electric backup. Commissioning checks the charge, airflow, defrost and the backup setting.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eThe furnace filter now serves both units: check it every month in season and replace it according to its format. Keep the outdoor unit clear of snow and leaves, without covering it. Annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance covers the heat pump's coil, condensate drain or pump and electrical connections, in addition to a check of the electric furnace and its elements. The white vapour during defrost, in winter, is normal.\u003c\/p\u003e\u003ch3\u003eWarranty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE Compact Quiet Comfort | 2 Tons - 24,000 BTU (Coil DLFULA 14.5 in.) - R410A. We measure your furnace, check the available space and confirm your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67797823979812,"sku":"DLCURAH24ABK","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_DLCURA_2_TONNES_24000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082528"},{"product_id":"thermopompe-centrale-add-on-arcoaire-compact-quiet-comfort-2-tonnes-24000-btu-serpentin-dlfula-17-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE Compact Quiet Comfort | 2 Tons - 24,000 BTU (Coil DLFULA 17.5 in.) - R410A","description":"\u003ch2\u003eReplace the central air conditioner with a heat pump and keep the electric furnace\u003c\/h2\u003e\u003cp\u003eWhen the central air conditioner installed on an \u003cstrong\u003eelectric furnace\u003c\/strong\u003e reaches the end of its life, you have two choices: replace it with another air conditioner, which will only work in summer, or install in its place a heat pump that cools in summer and heats the house for most of the winter. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE Compact Quiet Comfort | 2 Tons - 24,000 BTU (Coil DLFULA 17.5 in.) - R410A\u003c\/strong\u003e is the second choice. The \u003cstrong\u003eDLCURAH24ABK\u003c\/strong\u003e outdoor unit takes the air conditioner's place, and the \u003cstrong\u003eDLFULAH24XBX\u003c\/strong\u003e coil replaces the old coil on the furnace, which stays in place and whose elements serve as backup.\u003c\/p\u003e\u003cp\u003eIts certified ratings are \u003cstrong\u003e16.5 SEER2\u003c\/strong\u003e, \u003cstrong\u003e10.7 EER2\u003c\/strong\u003e and \u003cstrong\u003e9.5 HSPF2\u003c\/strong\u003e. The system is \u003cstrong\u003eENERGY STAR\u003c\/strong\u003e certified with the \u003cstrong\u003ecold-climate designation\u003c\/strong\u003e under \u003cstrong\u003eENERGY STAR ID 2841439\u003c\/strong\u003e, its certificate still lists capacity at \u003cstrong\u003e-30 °C\u003c\/strong\u003e, and it qualifies for a \u003cstrong\u003e$2,520 LogisVert grant\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eAn air conditioner only works one season\u003c\/h3\u003e\u003cp\u003eA central air conditioner and a heat pump look very much alike: an outdoor unit, a coil on the furnace, a line set between the two. The difference lies in a reversing valve that lets the heat pump move refrigerant in both directions. The air conditioner rejects the home's heat outdoors in summer, then sits idle for months. The heat pump does the same in summer and, in winter, captures heat from the outdoor air and brings it into the house.\u003c\/p\u003e\u003cp\u003eWhen replacing an air conditioner, the gap between the two options lies mostly in what happens in winter: with a heat pump, the electric furnace's elements only heat during deep cold. That is the principle of the \u003cstrong\u003eADD-ON\u003c\/strong\u003e approach.\u003c\/p\u003e\u003ch3\u003eWhat changes on the furnace\u003c\/h3\u003e\u003cp\u003eThe old air conditioner coil is removed and replaced with the heat pump coil, which goes in the same place, on the furnace's air outlet. Its width, \u003cstrong\u003e17.5 in.\u003c\/strong\u003e, must match the furnace's so that all the air passes through it; we measure it on site. The plenum is adjusted if the new coil's height requires it, and the condensate drain is connected.\u003c\/p\u003e\u003cp\u003eThe furnace blower keeps moving air through the \u003cstrong\u003educts\u003c\/strong\u003e. We check that it can deliver the airflow the heat pump requires, in heating as in cooling, and that the filter and air return are adequate.\u003c\/p\u003e\u003ch3\u003eWhat changes outside\u003c\/h3\u003e\u003cp\u003eAn air conditioner often sits on a pad on the ground, since it never runs in winter. A heat pump works under snow and produces defrost water in cold weather. It must therefore be installed \u003cstrong\u003eabove the snow line\u003c\/strong\u003e, on a wall bracket or a stand, away from roof drip, with room for defrost water to drain without freezing on a walkway.\u003c\/p\u003e\u003cp\u003eThe air conditioner's old location is often a starting point, but we validate it against these winter requirements before keeping it.\u003c\/p\u003e\u003ch3\u003eWhich homes it suits\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e2-ton\u003c\/strong\u003e size, or \u003cstrong\u003e24,000 BTU\/h\u003c\/strong\u003e, often matches a bungalow with a basement, a modest cottage or a semi-detached house in \u003cstrong\u003eLongueuil\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e or on the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, heated by an electric furnace. The old air conditioner's size gives a hint, but not an answer: it was chosen for summer only. The room-by-room load calculation accounts for heating as well as cooling.\u003c\/p\u003e\u003ch3\u003eWinter according to the certificate\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eAt -8 °C\u003c\/strong\u003e (17 °F): \u003cstrong\u003e21,000 BTU\/h\u003c\/strong\u003e, with a \u003cstrong\u003eCOP of 2.58\u003c\/strong\u003e, about 88% of the nominal size.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eAt -15 °C\u003c\/strong\u003e (5 °F): \u003cstrong\u003e20,000 BTU\/h\u003c\/strong\u003e, with a \u003cstrong\u003eCOP of 1.95\u003c\/strong\u003e.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eAt -30 °C\u003c\/strong\u003e: \u003cstrong\u003e16,000 BTU\/h\u003c\/strong\u003e, with a \u003cstrong\u003eCOP of 1.52\u003c\/strong\u003e.\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eThe -8 °C and -15 °C points are measured separately; we report each one as published. These figures come from certificate \u003cstrong\u003eAHRI 213372118\u003c\/strong\u003e, published by NEEP. COP compares the heat delivered with the energy used: an electric furnace's elements never deliver more heat than the electricity they receive, whereas this heat pump delivers more at each of these temperatures.\u003c\/p\u003e\u003ch3\u003eSharing the winter between the heat pump and the electric backup\u003c\/h3\u003e\u003cp\u003eA compatible thermostat decides what heats. As long as the heat pump holds the set point, it heats alone. When it is no longer enough, in deep cold, the thermostat brings in the electric furnace's elements as auxiliary heat, then takes them out as soon as the heat pump is enough again.\u003c\/p\u003e\u003cp\u003eThe moment the backup comes in is set according to the heat pump's capacity, the home's heat loss and your comfort preferences. For most of a \u003cstrong\u003eMontreal\u003c\/strong\u003e winter, the heat pump heats on its own; the furnace's elements join in during cold snaps. We set this during commissioning.\u003c\/p\u003e\u003ch3\u003eThe ratings, compared with an air conditioner\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eSEER2\u003c\/strong\u003e of 16.5 measures cooling efficiency over a typical summer; it is the rating that lets you compare the heat pump directly with a central air conditioner. The \u003cstrong\u003eEER2\u003c\/strong\u003e of 10.7 measures full-load efficiency on a hot day. Finally, the \u003cstrong\u003eHSPF2\u003c\/strong\u003e of 9.5 measures heating efficiency over the whole season: that is what an air conditioner does not offer.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003evariable-speed\u003c\/strong\u003e (\u003cstrong\u003einverter\u003c\/strong\u003e) compressor adjusts its speed to demand instead of the full-power starts of most older air conditioners. In summer, it runs for long periods at low speed and removes moisture better. The system runs on \u003cstrong\u003eR-410A\u003c\/strong\u003e, a refrigerant that refrigeration technicians know well.\u003c\/p\u003e\u003ch3\u003eThe $2,520 LogisVert grant\u003c\/h3\u003e\u003cp\u003eThe system is listed in Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e program, with \u003cstrong\u003e$2,520\u003c\/strong\u003e for the owner of an existing home, according to the list in effect on the installation date. The amount corresponds to the certified pairing of the DLCURAH24ABK outdoor unit and the DLFULAH24XBX coil.\u003c\/p\u003e\u003cp\u003eWe confirm eligibility before signing and prepare the detailed invoice, model numbers and proof of payment. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003eefficient heat pump grant\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003ch3\u003eThe replacement steps\u003c\/h3\u003e\u003col\u003e\u003cli\u003e\u003cstrong\u003eVisit\u003c\/strong\u003e: condition of the electric furnace, its elements and its blower, measurement of its width, ducts, air return, outdoor location, load calculation.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eRemoval of the old air conditioner\u003c\/strong\u003e: recovery of the refrigerant, as regulations require, then removal of the outdoor unit and the old coil.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eCoil\u003c\/strong\u003e: installation on the furnace, plenum adjustment, condensate drain connection.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eOutdoor unit\u003c\/strong\u003e: wall bracket or stand, \u003cstrong\u003eabove the snow line\u003c\/strong\u003e, away from roof drip.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eRefrigerant circuit\u003c\/strong\u003e: insulated copper line set, brazing, pressure test and vacuum.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eElectrical and thermostat\u003c\/strong\u003e: \u003cstrong\u003ededicated circuit\u003c\/strong\u003e, outdoor disconnect, thermostat that manages the heat pump and the furnace's electric backup.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eCommissioning\u003c\/strong\u003e: charge, airflow, defrost, backup setting, then an explanation of the settings.\u003c\/li\u003e\u003c\/ol\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eAn air conditioner was serviced in the spring; a heat pump works all year. The furnace filter serves both units: check it every month in season and replace it according to its format. Keep the outdoor unit clear of snow and leaves, without covering it in winter. Annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance covers the heat pump's coil, condensate drain and electrical connections, in addition to a check of the electric furnace and its elements. The white vapour during defrost is normal.\u003c\/p\u003e\u003ch3\u003eWarranty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE Compact Quiet Comfort | 2 Tons - 24,000 BTU (Coil DLFULA 17.5 in.) - R410A. We check your furnace and the location of your current air conditioner, and confirm your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67797824078116,"sku":"DLCURAH24ABK","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_DLCURA_2_TONNES_24000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082528"},{"product_id":"thermopompe-centrale-add-on-arcoaire-compact-quiet-comfort-2-5-tonnes-30000-btu-serpentin-dlfula-21-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE Compact Quiet Comfort | 2.5 Tons - 30,000 BTU (Coil DLFULA 21 in.) - R410A","description":"\u003ch2\u003eA heat pump that takes over from a large electric furnace for most of the winter\u003c\/h2\u003e\u003cp\u003eA home heated by an \u003cstrong\u003eelectric furnace\u003c\/strong\u003e that is still sound does not need to replace everything to switch to a heat pump. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE Compact Quiet Comfort | 2.5 Tons - 30,000 BTU (Coil DLFULA 21 in.) - R410A\u003c\/strong\u003e is added to the existing furnace: the \u003cstrong\u003eDLFULAH36XCX\u003c\/strong\u003e coil sits on its air outlet, the \u003cstrong\u003eDLCURAH30ABK\u003c\/strong\u003e outdoor unit is installed outside, and the heat pump heats and cools through the same \u003cstrong\u003educts\u003c\/strong\u003e. The furnace stays as backup: its electric elements only heat when the heat pump is not enough.\u003c\/p\u003e\u003cp\u003eIts certified ratings are \u003cstrong\u003e15.5 SEER2\u003c\/strong\u003e, \u003cstrong\u003e10.5 EER2\u003c\/strong\u003e and \u003cstrong\u003e9.7 HSPF2\u003c\/strong\u003e. The system is \u003cstrong\u003eENERGY STAR\u003c\/strong\u003e certified with the \u003cstrong\u003ecold-climate designation\u003c\/strong\u003e under \u003cstrong\u003eENERGY STAR ID 2841440\u003c\/strong\u003e, its certificate still lists capacity at \u003cstrong\u003e-30 °C\u003c\/strong\u003e, and it qualifies for a \u003cstrong\u003e$2,712 LogisVert grant\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eA 21 in. coil for wide furnaces\u003c\/h3\u003e\u003cp\u003eIn the \u003cstrong\u003eADD-ON\u003c\/strong\u003e approach, the furnace blower pushes air through the heat pump coil, which warms it in winter and cools it in summer. For all the air to pass through the coil, its width must match that of the furnace's air outlet. The \u003cstrong\u003e21 in.\u003c\/strong\u003e coil is meant for larger electric furnaces, common in family homes and among higher-capacity units.\u003c\/p\u003e\u003cp\u003eWe measure the furnace on site before confirming the model, along with the height available between the furnace and the plenum: the coil fits there, and the plenum is adjusted or rebuilt as needed. A condensate drain is connected to the coil, which produces water in cooling mode.\u003c\/p\u003e\u003ch3\u003eHomes heated by an electric furnace\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e2.5-ton\u003c\/strong\u003e size, or \u003cstrong\u003e30,000 BTU\/h\u003c\/strong\u003e, often suits a two-storey cottage, a large bungalow with a basement or a split-level on the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e, in \u003cstrong\u003eLaval\u003c\/strong\u003e or on the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e. In these homes, the electric furnace's elements are among the largest loads of the winter. Every hour of heating provided by the heat pump is an hour those elements stay off: the heat pump moves heat from the outdoor air instead of producing it, and the furnace only works as a top-up.\u003c\/p\u003e\u003cp\u003eThe size is confirmed by a room-by-room load calculation. In an ADD-ON system, we choose it first for good cooling, then check the share of heating the heat pump will be able to take on before calling on the furnace's elements.\u003c\/p\u003e\u003ch3\u003eThe share of winter the heat pump takes on\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eAt -8 °C\u003c\/strong\u003e (17 °F): \u003cstrong\u003e22,600 BTU\/h\u003c\/strong\u003e, with a \u003cstrong\u003eCOP of 2.62\u003c\/strong\u003e.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eAt -15 °C\u003c\/strong\u003e (5 °F): \u003cstrong\u003e27,000 BTU\/h\u003c\/strong\u003e, with a \u003cstrong\u003eCOP of 1.85\u003c\/strong\u003e, about 90% of the nominal size.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eAt -30 °C\u003c\/strong\u003e: \u003cstrong\u003e18,600 BTU\/h\u003c\/strong\u003e, with a \u003cstrong\u003eCOP of 1.50\u003c\/strong\u003e.\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eThe -8 °C and -15 °C points are measured separately; we report each one as published. These figures come from certificate \u003cstrong\u003eAHRI 213372119\u003c\/strong\u003e, published by NEEP. They show a heat pump able to heat the house for most of a \u003cstrong\u003eMontreal\u003c\/strong\u003e winter, with the furnace's electric elements stepping in only during deep cold snaps or according to the chosen setting.\u003c\/p\u003e\u003ch3\u003eWhen the electric elements take over\u003c\/h3\u003e\u003cp\u003eA compatible thermostat decides when the furnace steps in. As long as the heat pump holds the set point, it lets it heat alone. When demand exceeds what the heat pump can deliver, it brings in the furnace's electric elements as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e. During defrost, those elements can also heat for a few minutes so that the air from the grilles stays warm.\u003c\/p\u003e\u003cp\u003eThis setting is not fixed. It takes into account the heat pump's capacity, the home's heat loss and your comfort preferences, and it can be revisited from one season to the next. We set it during commissioning and can adjust it later.\u003c\/p\u003e\u003ch3\u003eWhat the ratings mean\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eHSPF2\u003c\/strong\u003e of 9.7 measures the heat pump's efficiency over the whole heating season. \u003cstrong\u003eCOP\u003c\/strong\u003e measures it at a specific temperature: at -8 °C, the heat pump delivers more than two and a half times the energy it uses, whereas the elements of an electric furnace never deliver more heat than the electricity they receive.\u003c\/p\u003e\u003cp\u003eOn the cooling side, the \u003cstrong\u003eSEER2\u003c\/strong\u003e of 15.5 measures efficiency over a typical summer and the \u003cstrong\u003eEER2\u003c\/strong\u003e of 10.5 measures full-load efficiency on a hot day. The \u003cstrong\u003evariable-speed\u003c\/strong\u003e (\u003cstrong\u003einverter\u003c\/strong\u003e) compressor adjusts its speed to demand, and the system runs on \u003cstrong\u003eR-410A\u003c\/strong\u003e, a refrigerant that refrigeration technicians know well.\u003c\/p\u003e\u003ch3\u003eAir conditioning, often for the first time\u003c\/h3\u003e\u003cp\u003eMany homes heated by an electric furnace have never had central air conditioning: the ducts are there, but they were only used for heating. With the heat pump, every room served by the ducts is cooled in summer, upstairs bedrooms included. The compressor slows down as it approaches the set point and runs for long periods at low speed, which removes moisture from the air and keeps the basement drier.\u003c\/p\u003e\u003cp\u003eThe furnace blower has to be set accordingly: a heat pump coil often needs more air in cooling than a furnace circulates in heating. We adjust its speed during commissioning and check that the upstairs registers get their share. Condensate drains from the coil to a floor drain or a pump.\u003c\/p\u003e\u003ch3\u003eThe $2,712 LogisVert grant\u003c\/h3\u003e\u003cp\u003eThe system is listed in Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e program, with \u003cstrong\u003e$2,712\u003c\/strong\u003e for the owner of an existing home, according to the list in effect on the installation date. The amount corresponds to the certified pairing of the DLCURAH30ABK outdoor unit and the DLFULAH36XCX coil.\u003c\/p\u003e\u003cp\u003eWe confirm eligibility before signing and prepare the detailed invoice, model numbers and proof of payment. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003eefficient heat pump grant\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003ch3\u003eThe furnace first, then the heat pump\u003c\/h3\u003e\u003cp\u003eAn ADD-ON system relies on the furnace: it has to be in good condition. During the visit, we check its age, its general condition, its blower and the airflow it can deliver, its heating elements and their electrical connections, the filter and the air return. If the furnace is nearing the end of its life, we tell you and present the other options, including a central heat pump with an air handler.\u003c\/p\u003e\u003cp\u003eOn installation day, the coil is mounted on the furnace and connected to the condensate drain. The outdoor unit goes on a wall bracket or a stand, \u003cstrong\u003eabove the snow line\u003c\/strong\u003e, away from roof drip. The insulated copper line set is brazed, pressure-tested and put under vacuum. The outdoor unit is connected on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e, with an outdoor disconnect; the ADD-ON approach adds no heating elements, since those of the electric furnace serve as backup, and we check that the panel can carry the heat pump in addition to the furnace. The thermostat is replaced with a model that manages the heat pump and electric auxiliary heat, then commissioning checks the charge, airflow, defrost and the elements coming in.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eThe furnace filter serves both units: check it every month in season and replace it according to its format. Keep the outdoor unit clear of snow and leaves, without covering it. A yearly check of the electric furnace and its blower is still worthwhile, and annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the heat pump covers the coil, the condensate drain and the electrical connections. The white vapour during defrost, in winter, is normal.\u003c\/p\u003e\u003ch3\u003eWarranty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE Compact Quiet Comfort | 2.5 Tons - 30,000 BTU (Coil DLFULA 21 in.) - R410A. We check your electric furnace, assess the home room by room and confirm your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67797824110884,"sku":"DLCURAH30ABK","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_DLCURA_2_5_TONNES_30000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082528"},{"product_id":"thermopompe-centrale-add-on-arcoaire-compact-quiet-comfort-3-tonnes-36000-btu-serpentin-dlfula-21-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE Compact Quiet Comfort | 3 Tons - 36,000 BTU (Coil DLFULA 21 in.) - R410A","description":"\u003ch2\u003eA 3-ton heat pump on a panel that already carries an electric furnace\u003c\/h2\u003e\u003cp\u003eA home heated by an \u003cstrong\u003eelectric furnace\u003c\/strong\u003e already asks a lot of its electrical service. The \u003cstrong\u003eADD-ON\u003c\/strong\u003e approach adds no new heating elements to it: the furnace stays in place, its elements serve as backup, and the heat pump is added to it. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE Compact Quiet Comfort | 3 Tons - 36,000 BTU (Coil DLFULA 21 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eDLCURAH36ABK\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eDLFULAH36XCX\u003c\/strong\u003e coil, mounted on the existing furnace; the heat pump heats and cools through the same \u003cstrong\u003educts\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eIts certified ratings are \u003cstrong\u003e15.2 SEER2\u003c\/strong\u003e, \u003cstrong\u003e10.0 EER2\u003c\/strong\u003e and \u003cstrong\u003e10.0 HSPF2\u003c\/strong\u003e. The system is \u003cstrong\u003eENERGY STAR\u003c\/strong\u003e certified with the \u003cstrong\u003ecold-climate designation\u003c\/strong\u003e under \u003cstrong\u003eENERGY STAR ID 2841442\u003c\/strong\u003e, its certificate still lists capacity at \u003cstrong\u003e-30 °C\u003c\/strong\u003e, and it qualifies for a \u003cstrong\u003e$3,960 LogisVert grant\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eWhy the ADD-ON approach spares the electrical panel\u003c\/h3\u003e\u003cp\u003eIn a home heated by an electric furnace, the furnace's heating elements are already connected to the panel, and they are among the largest loads in the house, alongside the range, the water heater and the dryer. A heat pump of this size adds the load of its outdoor unit to that set. Before proposing the size, we therefore have to make sure the panel and the electrical service can carry the heat pump in addition to the furnace.\u003c\/p\u003e\u003cp\u003eWith the ADD-ON approach, the backup is the existing electric furnace's elements. There are no heating elements to add: only the outdoor unit needs a new \u003cstrong\u003ededicated circuit\u003c\/strong\u003e. The furnace blower pushes air through the heat pump coil, which warms it in winter and cools it in summer, and the furnace's elements take over during deep cold. Over the winter, the heat pump takes on most of the heating, and those elements run far less often. We check the space and capacity in the panel during the visit; if the panel is not enough, we tell you before the quote.\u003c\/p\u003e\u003ch3\u003eA 3-ton family home\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e3-ton\u003c\/strong\u003e size, or \u003cstrong\u003e36,000 BTU\/h\u003c\/strong\u003e, often matches a two-storey cottage with a basement, a large bungalow or an older home with many rooms in \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e or on the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e, heated by an electric furnace in good condition, often without central air conditioning.\u003c\/p\u003e\u003cp\u003eThe size is confirmed by a room-by-room load calculation that accounts for insulation, windows and orientation. In an ADD-ON system, we choose it first for cooling, then assess the share of heating the heat pump will be able to take on before the furnace's elements take over.\u003c\/p\u003e\u003ch3\u003eThe 21 in. coil\u003c\/h3\u003e\u003cp\u003eFor all the furnace's air to pass through the coil, the coil's width must match that of the furnace's air outlet. The \u003cstrong\u003e21 in.\u003c\/strong\u003e coil is meant for wide furnaces, common in family homes. The same outdoor unit is also available with a narrower coil for smaller furnaces; we measure your unit on site before confirming the model. The coil fits between the furnace and the plenum, which is adjusted as needed, and a condensate drain is connected to it.\u003c\/p\u003e\u003ch3\u003eThe certificate, from -8 °C to -30 °C\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eAt -8 °C\u003c\/strong\u003e (17 °F): \u003cstrong\u003e33,000 BTU\/h\u003c\/strong\u003e, with a \u003cstrong\u003eCOP of 2.40\u003c\/strong\u003e, about 92% of the nominal size.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eAt -15 °C\u003c\/strong\u003e (5 °F): \u003cstrong\u003e32,000 BTU\/h\u003c\/strong\u003e, with a \u003cstrong\u003eCOP of 2.00\u003c\/strong\u003e.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eAt -30 °C\u003c\/strong\u003e: \u003cstrong\u003e24,000 BTU\/h\u003c\/strong\u003e, with a \u003cstrong\u003eCOP of 1.42\u003c\/strong\u003e.\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eThe -8 °C and -15 °C points are measured separately; we report each one as published. These figures come from certificate \u003cstrong\u003eAHRI 213372121\u003c\/strong\u003e, published by NEEP. The heat pump keeps most of its capacity down to -15 °C, which hands it the larger part of a \u003cstrong\u003eMontreal\u003c\/strong\u003e winter; the furnace's elements step in mainly during deep cold snaps.\u003c\/p\u003e\u003ch3\u003eThe 10.0 HSPF2 rating and COP\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eHSPF2\u003c\/strong\u003e measures the heat pump's efficiency over the whole heating season, accounting for mild days, cold days and defrost cycles. At \u003cstrong\u003e10.0 HSPF2\u003c\/strong\u003e, each kilowatt-hour the heat pump uses turns, over the season, into much more heat than with ordinary electric heating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCOP\u003c\/strong\u003e measures it at a specific temperature: at -15 °C, this system delivers twice as much heat as the electricity it uses. The elements of an electric furnace, for their part, never deliver more heat than the electricity they receive.\u003c\/p\u003e\u003ch3\u003eElectric auxiliary heat, only when needed\u003c\/h3\u003e\u003cp\u003eA compatible thermostat manages the heat pump and the furnace's elements. The heat pump heats first; when it can no longer hold the set point, the thermostat brings in the electric elements as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e. During defrost, those elements can also heat for a few minutes so that the air from the grilles stays warm.\u003c\/p\u003e\u003cp\u003eThe moment auxiliary heat comes in is set according to the heat pump's capacity, the home's heat loss and your comfort preferences. We set it during commissioning and adjust it as needed.\u003c\/p\u003e\u003ch3\u003eSummer\u003c\/h3\u003e\u003cp\u003eIn summer, the heat pump cools every room served by the ducts, with \u003cstrong\u003e15.2 SEER2\u003c\/strong\u003e over a typical summer and \u003cstrong\u003e10.0 EER2\u003c\/strong\u003e at full load on a hot day. Its \u003cstrong\u003evariable-speed\u003c\/strong\u003e (\u003cstrong\u003einverter\u003c\/strong\u003e) compressor slows down as it approaches the set point and runs for long periods at low speed, which removes moisture from the air. The furnace blower is set to deliver the airflow that cooling requires. The system runs on \u003cstrong\u003eR-410A\u003c\/strong\u003e, a refrigerant that refrigeration technicians know well.\u003c\/p\u003e\u003ch3\u003eThe $3,960 LogisVert grant\u003c\/h3\u003e\u003cp\u003eThe system is listed in Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e program, with \u003cstrong\u003e$3,960\u003c\/strong\u003e for the owner of an existing home, according to the list in effect on the installation date. The amount corresponds to the certified pairing of the DLCURAH36ABK outdoor unit and the DLFULAH36XCX coil.\u003c\/p\u003e\u003cp\u003eWe confirm eligibility before signing and prepare the detailed invoice, model numbers and proof of payment. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003eefficient heat pump grant\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003ch3\u003eFrom the visit to commissioning\u003c\/h3\u003e\u003cp\u003eThe visit is used to check the furnace's condition, its age, its blower and the airflow it can deliver, its heating elements, the filter, the ducts and the air return, as well as the electrical panel and what it already carries. If the furnace is nearing the end of its life, we tell you and present the other options.\u003c\/p\u003e\u003cp\u003eOn installation day, the coil is mounted on the furnace and connected to the condensate drain. The outdoor unit goes on a wall bracket or a stand, \u003cstrong\u003eabove the snow line\u003c\/strong\u003e, away from roof drip. The insulated copper line set is brazed, pressure-tested and put under vacuum. The outdoor unit is connected on its \u003cstrong\u003ededicated circuit\u003c\/strong\u003e, with an outdoor disconnect, and the thermostat is replaced with a model that manages the heat pump and electric auxiliary heat. Commissioning checks the charge, airflow, defrost and the elements coming in; we then explain the settings to you.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eThe furnace filter now serves both units: check it every month in season and replace it according to its format. Keep the outdoor unit clear of snow and leaves, without covering it. A yearly check of the electric furnace, its elements and its blower is still worthwhile, and annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the heat pump covers the coil, the condensate drain and the electrical connections. In winter, the white vapour during defrost is normal.\u003c\/p\u003e\u003ch3\u003eWarranty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE Compact Quiet Comfort | 3 Tons - 36,000 BTU (Coil DLFULA 21 in.) - R410A. We check your electric furnace and your panel, assess the home room by room and confirm your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67797824700708,"sku":"DLCURAH36ABK","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_DLCURA_3_TONNES_36000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082528"},{"product_id":"thermopompe-centrale-add-on-arcoaire-compact-quiet-comfort-3-tonnes-36000-btu-serpentin-dlfula-17-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE Compact Quiet Comfort | 3 Tons - 36,000 BTU (Coil DLFULA 17.5 in.) - R410A","description":"\u003ch2\u003eThree tons of heat pump on a mid-width electric furnace\u003c\/h2\u003e\u003cp\u003eMany family homes are heated by a mid-width \u003cstrong\u003eelectric furnace\u003c\/strong\u003e that is still in good condition, with no central air conditioning or with an old air conditioner. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE Compact Quiet Comfort | 3 Tons - 36,000 BTU (Coil DLFULA 17.5 in.) - R410A\u003c\/strong\u003e is added to that furnace: the \u003cstrong\u003eDLFULAH36XBX\u003c\/strong\u003e coil sits on its air outlet, the \u003cstrong\u003eDLCURAH36ABK\u003c\/strong\u003e outdoor unit is installed outside, and the heat pump heats and cools through the same \u003cstrong\u003educts\u003c\/strong\u003e. The furnace stays in place as backup, and its electric elements only heat in deep cold.\u003c\/p\u003e\u003cp\u003eIts certified ratings are \u003cstrong\u003e15.5 SEER2\u003c\/strong\u003e, \u003cstrong\u003e10.0 EER2\u003c\/strong\u003e and \u003cstrong\u003e8.6 HSPF2\u003c\/strong\u003e. The system is \u003cstrong\u003eENERGY STAR\u003c\/strong\u003e certified with the \u003cstrong\u003ecold-climate designation\u003c\/strong\u003e under \u003cstrong\u003eENERGY STAR ID 2841441\u003c\/strong\u003e, its certificate still lists capacity at \u003cstrong\u003e-30 °C\u003c\/strong\u003e, and it qualifies for a \u003cstrong\u003e$3,288 LogisVert grant\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eThe 17.5 in. coil and its certificate\u003c\/h3\u003e\u003cp\u003eIn the \u003cstrong\u003eADD-ON\u003c\/strong\u003e approach, the furnace blower pushes air through the heat pump coil, which warms it in winter and cools it in summer. The coil's width must match that of the furnace's air outlet: here, \u003cstrong\u003e17.5 in.\u003c\/strong\u003e, a common width for residential furnaces.\u003c\/p\u003e\u003cp\u003eThe same outdoor unit is also available with a wider coil, meant for larger furnaces. Each pairing has its own AHRI certificate, its own ratings and its own grant amount. The furnace in place determines the coil; we measure it on site before confirming the model.\u003c\/p\u003e\u003ch3\u003eThe furnace blower, the critical point\u003c\/h3\u003e\u003cp\u003eA 3-ton heat pump requires substantial airflow, especially in cooling. In an ADD-ON system, it is the furnace blower that has to supply it. A mid-width furnace may be up to the task, but it has to be checked: a blower that is too weak or a duct system that is too restrictive reduces the heat pump's efficiency, causes the coil to freeze in summer or the system to overheat in winter.\u003c\/p\u003e\u003cp\u003eDuring the visit, we examine the blower, its available speeds, the filter, the air return and the duct sizes. If the furnace cannot deliver the required airflow, we tell you plainly and present other options, such as a smaller size or a central heat pump with an air handler.\u003c\/p\u003e\u003ch3\u003eThe homes it is meant for\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e3-ton\u003c\/strong\u003e size, or \u003cstrong\u003e36,000 BTU\/h\u003c\/strong\u003e, often matches a two-storey cottage with a basement, a large bungalow or a spacious semi-detached house in \u003cstrong\u003eLongueuil\u003c\/strong\u003e, on the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e or in \u003cstrong\u003eLaval\u003c\/strong\u003e, heated by an electric furnace and often cooled until now by window units, or not at all. The size is confirmed by a room-by-room load calculation. In an ADD-ON system, we choose it first for good cooling, without oversizing, then assess the share of heating the heat pump will be able to take on.\u003c\/p\u003e\u003ch3\u003eWhat the certificate lists\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eAt -8 °C\u003c\/strong\u003e (17 °F): \u003cstrong\u003e27,400 BTU\/h\u003c\/strong\u003e, with a \u003cstrong\u003eCOP of 2.12\u003c\/strong\u003e.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eAt -15 °C\u003c\/strong\u003e (5 °F): \u003cstrong\u003e31,600 BTU\/h\u003c\/strong\u003e, with a \u003cstrong\u003eCOP of 1.85\u003c\/strong\u003e, about 88% of the nominal size.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eAt -30 °C\u003c\/strong\u003e: \u003cstrong\u003e20,000 BTU\/h\u003c\/strong\u003e, with a \u003cstrong\u003eCOP of 1.26\u003c\/strong\u003e.\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eThe -8 °C and -15 °C points are measured separately; we report each one as published. These figures come from certificate \u003cstrong\u003eAHRI 213372120\u003c\/strong\u003e, published by NEEP.\u003c\/p\u003e\u003ch3\u003eReading the ratings plainly\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eHSPF2\u003c\/strong\u003e of 8.6 measures the heat pump's efficiency over the whole heating season. It is a sound rating for a cold-climate certified heat pump, without being among the highest; in an ADD-ON system, where the furnace's elements take over during deep cold, it applies mostly to the long stretches of fall, mild winter and spring, when the heat pump works the most.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCOP\u003c\/strong\u003e gives the reading at a specific temperature: at -8 °C, the heat pump delivers more than twice the heat it uses in electricity, whereas the elements of an electric furnace never deliver more heat than the electricity they receive. In cooling, the \u003cstrong\u003eSEER2\u003c\/strong\u003e of 15.5 measures efficiency over a typical summer and the \u003cstrong\u003eEER2\u003c\/strong\u003e of 10.0 measures full-load efficiency on a hot day.\u003c\/p\u003e\u003ch3\u003eWhich unit heats, and when\u003c\/h3\u003e\u003cp\u003eA compatible thermostat decides when the furnace steps in. The heat pump heats first; when it can no longer hold the set point, the thermostat brings in the furnace's electric elements as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e. During defrost, those elements can also heat for a few minutes so that the air from the grilles stays warm.\u003c\/p\u003e\u003cp\u003eThe moment auxiliary heat comes in takes into account the heat pump's capacity, the home's heat loss and your comfort preferences. For most of a \u003cstrong\u003eMontreal\u003c\/strong\u003e winter, the heat pump heats on its own; the furnace's elements step in mainly during cold snaps. We set this moment during commissioning and adjust it as needed.\u003c\/p\u003e\u003ch3\u003eCooling\u003c\/h3\u003e\u003cp\u003eIn summer, the heat pump cools every room served by the ducts. Its \u003cstrong\u003evariable-speed\u003c\/strong\u003e (\u003cstrong\u003einverter\u003c\/strong\u003e) compressor slows down as it approaches the set point and runs for long periods at low speed, which removes moisture from the air and keeps the basement drier. Condensate drains from the coil to a floor drain or a pump. The system runs on \u003cstrong\u003eR-410A\u003c\/strong\u003e, a refrigerant that refrigeration technicians know well.\u003c\/p\u003e\u003ch3\u003eThe $3,288 LogisVert grant\u003c\/h3\u003e\u003cp\u003eThe system is listed in Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e program, with \u003cstrong\u003e$3,288\u003c\/strong\u003e for the owner of an existing home, according to the list in effect on the installation date. The amount corresponds to the certified pairing of the DLCURAH36ABK outdoor unit and the DLFULAH36XBX coil.\u003c\/p\u003e\u003cp\u003eWe confirm eligibility before signing and prepare the detailed invoice, model numbers and proof of payment. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003eefficient heat pump grant\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003ch3\u003eThe steps\u003c\/h3\u003e\u003col\u003e\u003cli\u003e\u003cstrong\u003eVisit\u003c\/strong\u003e: electric furnace condition and age, blower and airflow, heating elements, ducts, air return, electrical panel, load calculation.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eWritten quote\u003c\/strong\u003e: size, coil, planned settings, corrections to the duct system where needed.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eCoil\u003c\/strong\u003e: installation on the furnace, plenum adjustment, condensate drain connection.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eOutdoor unit\u003c\/strong\u003e: wall bracket or stand, \u003cstrong\u003eabove the snow line\u003c\/strong\u003e, away from roof drip.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eRefrigerant circuit\u003c\/strong\u003e: insulated copper line set, brazing, pressure test and vacuum.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eElectrical and thermostat\u003c\/strong\u003e: \u003cstrong\u003ededicated circuit\u003c\/strong\u003e, outdoor disconnect, a panel able to carry the heat pump in addition to the furnace, thermostat that manages the heat pump and electric auxiliary heat.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eCommissioning\u003c\/strong\u003e: charge, blower speed setting, airflow, defrost and the furnace's elements coming in.\u003c\/li\u003e\u003c\/ol\u003e\u003ch3\u003eTwo units, coordinated maintenance\u003c\/h3\u003e\u003cp\u003eWith an ADD-ON system, the home has two units that share the same blower and the same filter. Check that filter every month in season and replace it according to its format: it protects both the furnace and the coil. Keep the outdoor unit clear of snow and leaves, without covering it. A yearly check of the electric furnace and its elements is still worthwhile, and annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the heat pump covers the coil, the condensate drain and the electrical connections; the simplest approach is to schedule them together, in the fall. The white vapour during defrost, in winter, is normal.\u003c\/p\u003e\u003ch3\u003eWarranty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE Compact Quiet Comfort | 3 Tons - 36,000 BTU (Coil DLFULA 17.5 in.) - R410A. We check your electric furnace's blower and condition, assess the home room by room and confirm your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67797824766244,"sku":"DLCURAH36ABK","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_DLCURA_3_TONNES_36000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082528"},{"product_id":"thermopompe-centrale-add-on-arcoaire-r4h5s-economique-1-5-tonnes-18000-btu-serpentin-evd4x-14-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 1.5 Tons - 18,000 BTU (Coil EVD4X 14.5 in.) - R410A","description":"\u003ch2\u003eAdd air conditioning and shoulder-season heating to your electric furnace without replacing it\u003c\/h2\u003e\u003cp\u003eIn many small homes across Greater \u003cstrong\u003eMontreal\u003c\/strong\u003e, the \u003cstrong\u003eelectric furnace\u003c\/strong\u003e still works very well, but it heats alone from fall to spring and the house has no central air conditioning. The \u003cstrong\u003eADD-ON\u003c\/strong\u003e system meets both needs at once: a \u003cstrong\u003ecoil\u003c\/strong\u003e is installed on the existing furnace and an outdoor unit heats and cools through the same \u003cstrong\u003educts\u003c\/strong\u003e. The furnace stays in place and its elements are only used as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 1.5 Tons - 18,000 BTU (Coil EVD4X 14.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eR4H5S18AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X18M14A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eThe R4H5S series is the entry level of this Arcoaire family, and the 1.5-ton size is aimed at compact homes. It is a measured way to hand a good share of the heating over to the heat pump rather than the furnace's elements, and add summer comfort, without dismantling a system that works.\u003c\/p\u003e\u003ch3\u003eWhich homes this size suits\u003c\/h3\u003e\u003cp\u003eA 1.5-ton \u003cstrong\u003eADD-ON central heat pump\u003c\/strong\u003e is meant for smaller homes that already have a forced-air electric furnace and a duct network: a small, well-insulated bungalow, a townhouse, a compact semi-detached house or a duplex unit with its own furnace. What matters is that this electric furnace is in good condition and that its blower can move the air the coil needs.\u003c\/p\u003e\u003cp\u003eFloor area alone does not settle the question. Attic and wall insulation, window age, orientation and the airtightness of the envelope change the needs from one house to the next. An older home that was never renovated may call for the next size up, while a recent, well-sealed house is often fine with this one. We do the load calculation, room by room, before proposing a size.\u003c\/p\u003e\u003ch3\u003eWhat the heat pump does, what the furnace keeps\u003c\/h3\u003e\u003cp\u003eA heat pump does not produce its heat with heating elements, the way the electric furnace does: it moves it. In winter, the refrigerant picks up heat from the outdoor air, the compressor concentrates it and sends it to the coil sitting on the furnace. The furnace blower pushes the house air through that coil, then into the ducts. In summer, a reversing valve flips the cycle and the heat from the house is rejected outdoors.\u003c\/p\u003e\u003cp\u003eThe furnace, for its part, stays ready to heat. Its blower now serves both appliances, and its electric elements only come on when the thermostat calls for backup heat. The refrigeration circuit runs on \u003cstrong\u003eR-410A\u003c\/strong\u003e, a refrigerant that refrigeration technicians know well.\u003c\/p\u003e\u003ch3\u003eA size chosen first for cooling\u003c\/h3\u003e\u003cp\u003eWith an ADD-ON system, the electric furnace's elements already cover the coldest days. The heat pump therefore does not need to be sized for the worst of winter: it is chosen according to the home's cooling needs, while checking that it carries a good share of the heating the rest of the year. That is why a small house is often better served by 1.5 tons than by a larger size.\u003c\/p\u003e\u003cp\u003eAn oversized unit cools too fast, shuts off, then starts again. These short cycles leave humidity in the air, create temperature differences between rooms and wear out components. A properly sized unit runs longer on each cycle, which gives drier air in summer and steadier heat in the shoulder seasons.\u003c\/p\u003e\u003ch3\u003eSummer: the whole house cooled through the ducts\u003c\/h3\u003e\u003cp\u003eOnce installed, the heat pump cools every room served by the ducts, with no unit visible on the wall. Cool air comes out of the existing grilles and returns through the furnace's return air. The coil also removes humidity: the condensed water flows through a drain to a floor drain or a pump, and a basement served by the ducts benefits from this drier air.\u003c\/p\u003e\u003cp\u003eIn a small house, the bedrooms are often the rooms that get the hottest in July. We check that each one has its supply register and that air can return to the furnace, even with the door closed. A bedroom without a return path stays warmer than the rest of the house, whatever the equipment.\u003c\/p\u003e\u003ch3\u003eWinter: the heat pump first, the electric backup next\u003c\/h3\u003e\u003cp\u003eIn fall, in spring and through a good part of winter, the heat pump heats alone. As the cold deepens, the heat it can capture decreases while the home's needs increase. The thermostat then brings in the furnace's elements, which supplement the heat on the coldest nights. This pairing does not carry the cold-climate designation: the furnace's electric backup is precisely what serves as the safety net.\u003c\/p\u003e\u003cp\u003eThe thermostat adds the electric elements as auxiliary heat when the heat pump can no longer hold the set point, then takes them out as soon as it is enough again. During defrost cycles, the elements may also come on for a few minutes so that cool air does not come out of the grilles.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eR4H5S18AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X18M14A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility. This page therefore publishes no rating figure for this pairing.\u003c\/p\u003e\u003cp\u003eTo read these ratings when the time comes: SEER2 measures seasonal cooling efficiency, EER2 the efficiency on a hot day at full demand, and HSPF2 seasonal heating efficiency. They apply to a specific combination, outdoor unit and coil, and that is the combination we write into the quote.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003egrant for efficient heat pumps\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eWhat installation on your furnace includes\u003c\/h2\u003e\u003ch3\u003eThe 14.5 in. EVD4X coil\u003c\/h3\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, in the supply plenum. Before the quote, we check the condition of the electric furnace, the airflow of its blower and the duct sizes, then we measure the furnace outlet and the free space above it. The 14.5 in. coil must line up with the furnace; if it does not, we fabricate a sealed transition. In a basement with a low ceiling, this measurement sometimes decides how the plenum is rebuilt.\u003c\/p\u003e\u003cp\u003eThe coil has its own pan and condensate drain. We connect it to a floor drain or a pump with a steady slope, and if a humidifier already drains to the same spot, we arrange the two drains so that both flow without backing up.\u003c\/p\u003e\u003ch3\u003eOutdoor unit, refrigerant line and electrical\u003c\/h3\u003e\u003cp\u003eThe outdoor unit goes on a bracket or a pad, above the snow line, away from roof drips, dryer vents and bedroom windows. Defrost water must be able to drain without freezing on a driveway or a walkway. The insulated copper line connects the unit to the coil; we braze it, pressure test it and pull a vacuum before opening the valves.\u003c\/p\u003e\u003cp\u003eOn the electrical side, the outdoor unit requires a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e and a nearby disconnect. In a house heated by an electric furnace, the panel is often already heavily loaded: we check its capacity and free space during the visit rather than on installation day.\u003c\/p\u003e\u003ch3\u003eThermostat and commissioning\u003c\/h3\u003e\u003cp\u003eA compatible \u003cstrong\u003ethermostat\u003c\/strong\u003e decides when the heat pump heats alone and when the electric furnace's elements add backup heat. A furnace-only thermostat cannot control a heat pump; we replace it and add, where needed, the wiring missing between the furnace and the outdoor unit.\u003c\/p\u003e\u003cp\u003eAt commissioning, we check the refrigerant charge, the airflow in heat pump mode, defrost and how the electric backup comes in. We then set with you the point at which the furnace's elements should step in, and show you how to read the thermostat.\u003c\/p\u003e\u003ch3\u003eMaintenance and warranty\u003c\/h3\u003e\u003cp\u003eThe furnace filter now works all year: check it every month and replace it according to its format. Keep the outdoor unit clear of snow and leaves, without covering it in winter since it heats. Plan annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the coil, the condensate drain and the electrical connections; the electric furnace and its elements are checked during the same visit. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003eFor an ADD-ON system, these three licences cover the three parts of the job: the connection to the ducts, the refrigeration circuit and the electrical supply to the outdoor unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 1.5 Tons - 18,000 BTU (Coil EVD4X 14.5 in.) - R410A. We examine your furnace and ducts and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67797963997476,"sku":"R4H5S18AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_R4H5S_1_5_TONNES_18000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082540"},{"product_id":"thermopompe-centrale-add-on-arcoaire-n4h5s-performance-1-5-tonnes-18000-btu-serpentin-evd4x-14-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 1.5 Tons - 18,000 BTU (Coil EVD4X 14.5 in.) - R410A","description":"\u003ch2\u003eA small home, an electric furnace and a thermostat that puts the heat pump to work first\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eADD-ON\u003c\/strong\u003e system adds a heat pump to an existing \u003cstrong\u003eelectric furnace\u003c\/strong\u003e: a \u003cstrong\u003ecoil\u003c\/strong\u003e is installed on the furnace and the outdoor unit heats and cools through the same \u003cstrong\u003educts\u003c\/strong\u003e. The furnace's elements are only used as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 1.5 Tons - 18,000 BTU (Coil EVD4X 14.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eN4H5S18AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X18M14A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eIn this type of installation, the equipment matters, but the logic that runs it matters just as much. Two heat sources share the same blower and the same ducts, and the \u003cstrong\u003ethermostat\u003c\/strong\u003e decides, hour by hour, whether the heat pump is enough or whether the furnace's electric elements need to back it up. This page explains how that sharing works in a compact home, then what the installation includes.\u003c\/p\u003e\u003ch3\u003eHeat pump and electric backup, plainly\u003c\/h3\u003e\u003cp\u003eBoth sources run on electricity, but not in the same way. The furnace's heating elements produce heat directly: they give back as heat the electricity they use, and no more. The heat pump, for its part, moves heat from the outdoor air into the house. For most of the year, it heats alone. When the cold becomes too sharp for it, the furnace's elements join in as backup. In summer, the heat pump cools the whole house through the same grilles.\u003c\/p\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and the furnace blower serves both sources. The thermostat brings in the elements as auxiliary heat when the heat pump can no longer hold the set point, then takes them out as soon as it is enough again. That is the basic rule of an ADD-ON system on an electric furnace.\u003c\/p\u003e\u003ch3\u003eYour home's balance point\u003c\/h3\u003e\u003cp\u003eThe colder it gets outside, the more heat the house loses, and the less the heat pump can capture. At a certain moment, the two curves cross: that is the balance point. Above it, the heat pump is enough; below it, the furnace's elements must supplement the heat. This point is not printed on the unit; it depends on your house: its insulation, its windows, its airtightness and its size.\u003c\/p\u003e\u003cp\u003eIn a compact, well-insulated home, a 1.5-ton size pushes that point fairly deep into winter. In a house that loses a lot of heat, it arrives sooner. That is one of the reasons we do a load calculation, room by room, before confirming the size.\u003c\/p\u003e\u003ch3\u003eKeeping the elements at rest as long as possible\u003c\/h3\u003e\u003cp\u003eThe second setting determines when the electric backup comes in. With an electric furnace, the logic is simple: the heat pump keeps control as long as it is enough, and the elements only come in once it no longer is. Every hour the heat pump heats alone is an hour when the elements, which only give back the electricity they use, stay off.\u003c\/p\u003e\u003cp\u003eBackup that comes in too early runs the elements when the heat pump would be enough; backup that comes in too late can leave the house cool on the morning of a cold snap. We set these parameters with you at commissioning, and they remain adjustable.\u003c\/p\u003e\u003ch3\u003eWhat the thermostat needs to do\u003c\/h3\u003e\u003cp\u003eA furnace-only thermostat cannot control a heat pump. The thermostat we install controls the reversing valve, the furnace's blower and elements, and the outdoor unit, and it takes the outdoor temperature into account, through a sensor or weather data depending on the model. It also manages defrost: during those few minutes, the furnace's elements can come on so that the air coming out of the grilles stays warm.\u003c\/p\u003e\u003cp\u003eWhere needed, we add the wiring missing between the furnace and the outdoor unit, and at commissioning we explain how to read the screen: which source is heating, when the furnace's elements join in, and how to adjust the setpoint without upsetting the sharing.\u003c\/p\u003e\u003ch3\u003eWhich homes this size suits\u003c\/h3\u003e\u003cp\u003eThe 1.5-ton size is aimed at compact homes that already have a forced-air electric furnace: a small bungalow, a townhouse, a semi-detached house or a plex unit served by its own furnace and its own duct network. With an ADD-ON system, the heat pump is chosen first according to cooling needs, since the furnace's elements cover the deep cold. A unit larger than needed would cool in fits and starts and remove humidity poorly.\u003c\/p\u003e\u003cp\u003eFloor area alone does not settle it. A house from the seventies whose attic was never re-insulated does not compare with a recent, well-sealed townhouse, even if both have the same living area. The load calculation accounts for the walls, the windows, the orientation and air leakage, and it is what confirms whether 1.5 tons is enough or whether the next size up is needed.\u003c\/p\u003e\u003ch3\u003eSummer: cooling and drier air\u003c\/h3\u003e\u003cp\u003eIn cooling mode, the house air passes through the cold coil, which removes both heat and humidity. The condensed water flows through a drain to a floor drain or a pump. A properly sized unit runs long enough on each cycle to dry the air well, which you feel most in the bedrooms and the basement.\u003c\/p\u003e\u003cp\u003eWe also check the return air: a house heated by an electric furnace alone does not always have enough returns for cooling, and a closed bedroom without a return stays warmer than the rest of the house.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eN4H5S18AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X18M14A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility. We therefore publish no rating figure here for this pairing.\u003c\/p\u003e\u003cp\u003eOnce these ratings are confirmed, here is how to read them: SEER2 reflects cooling efficiency over a season, EER2 the efficiency on a heat-wave day, and HSPF2 heating efficiency over a season. In an ADD-ON installation, HSPF2 tells only part of the story, since the furnace's elements supplement the heat during the coldest hours.\u003c\/p\u003e\u003ch3\u003eLogisVert grant\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size. The program's conditions are summarized on our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003egrant for efficient heat pumps\u003c\/a\u003e.\u003c\/p\u003e\u003ch2\u003eThe installation, from the furnace to the thermostat\u003c\/h2\u003e\u003ch3\u003eThe visit before the quote\u003c\/h3\u003e\u003cp\u003eWe check the condition of the electric furnace and its elements, the airflow of its blower and the duct sizes before the quote. The blower must be able to move the air the coil needs, and the ducts must deliver it to the grilles without whistling. We also measure the furnace outlet and the clearance above it: the 14.5 in. coil must line up with it, or a sealed transition is planned. If the furnace shows signs of advanced wear, we tell you before you sign.\u003c\/p\u003e\u003ch3\u003eThe job\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eCoil\u003c\/strong\u003e: set on the furnace's air outlet, connected to the plenum and to its condensate drain.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eOutdoor unit\u003c\/strong\u003e: on a bracket, above the snow line, away from roof drips and dryer vents.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eRefrigerant line\u003c\/strong\u003e: insulated copper, brazing, pressure test and vacuum before the valves are opened.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eElectrical\u003c\/strong\u003e: \u003cstrong\u003ededicated circuit\u003c\/strong\u003e and outdoor disconnect.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eCommissioning\u003c\/strong\u003e: refrigerant charge, airflow, defrost and setting of the electric backup.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eThe furnace filter now works summer and winter: check it every month and replace it according to its format. Keep the outdoor unit clear of snow and leaves. Plan annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the coil, the condensate drain and the electrical connections, in addition to a check of the electric furnace and its elements. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 1.5 Tons - 18,000 BTU (Coil EVD4X 14.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67797964030244,"sku":"N4H5S18AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_N4H5S_1_5_TONNES_18000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082539"},{"product_id":"thermopompe-centrale-add-on-arcoaire-hsh6-haut-de-gamme-1-5-tonnes-18000-btu-serpentin-evd4x-14-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE HSH6 Premium | 1.5 Tons - 18,000 BTU (Coil EVD4X 14.5 in.) - R410A","description":"\u003ch2\u003eReplace the old central air conditioner with a heat pump that also heats\u003c\/h2\u003e\u003cp\u003eMany homes already have a central air conditioner added to the \u003cstrong\u003eelectric furnace\u003c\/strong\u003e: a condenser in the yard and a \u003cstrong\u003ecoil\u003c\/strong\u003e above the furnace. When that air conditioner reaches the end of its life, replacing it with an \u003cstrong\u003eADD-ON\u003c\/strong\u003e system changes things: the new outdoor unit still cools in summer, but it also heats the house for a good part of the year, through the same \u003cstrong\u003educts\u003c\/strong\u003e. The furnace stays in place and its elements are only used as backup.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE HSH6 Premium | 1.5 Tons - 18,000 BTU (Coil EVD4X 14.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eHSH618GKA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X18M14A\u003c\/strong\u003e coil. The HSH6 series is presented as the premium tier of this Arcoaire family, and the 1.5-ton size is aimed at small houses and compact homes.\u003c\/p\u003e\u003ch3\u003eFrom air conditioner to heat pump: what changes\u003c\/h3\u003e\u003cp\u003eAn air conditioner does only one thing: it rejects the heat of the house outdoors. A heat pump does the same job in summer, then reverses the cycle in winter thanks to a reversing valve: it captures heat from the outdoor air and delivers it to the coil, which the furnace blower then distributes through the ducts. The circuit runs on \u003cstrong\u003eR-410A\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eFor you, the difference shows mostly at the thermostat. It now controls two heat sources: the heat pump heats first, and the furnace's electric elements join in as backup when the cold becomes too sharp. The original thermostat, designed for a furnace and an air conditioner, cannot manage this sharing; we replace it with a compatible model.\u003c\/p\u003e\u003ch3\u003eWhy the old coil does not stay\u003c\/h3\u003e\u003cp\u003eThe coil in place was chosen for an air conditioner. In heating mode, a heat pump's coil becomes the hot side of the circuit, and an air conditioner coil is not always designed for this double role. It may also have been intended for another refrigerant. Above all, a system's ratings are established for a specific combination, outdoor unit and coil: that is why we install the \u003cstrong\u003eEVD4X18M14A\u003c\/strong\u003e coil with the \u003cstrong\u003eHSH618GKA\u003c\/strong\u003e unit, rather than connecting a new unit to a coil from another generation.\u003c\/p\u003e\u003ch3\u003eThe existing refrigerant line\u003c\/h3\u003e\u003cp\u003eThe copper line connecting the old condenser to the coil often runs through a finished wall or a basement ceiling. Keeping it would simplify the work, but only if its diameter suits the new unit, if it is in good condition and if it can be properly cleaned. R-410A works at higher pressures than older-generation refrigerants, and a doubtful line eventually calls for a service visit. We assess it during the visit; when in doubt, we replace it.\u003c\/p\u003e\u003ch3\u003eThe right size is not necessarily the old air conditioner's\u003c\/h3\u003e\u003cp\u003eThe size of the old unit gives a hint, not an answer. Many air conditioners were chosen \"a little bigger, to be sure,\" and the house may have changed since: new windows, a re-insulated attic, a finished basement. With an ADD-ON system, the heat pump is sized first according to cooling needs, since the furnace's elements cover the deep cold.\u003c\/p\u003e\u003cp\u003eThe 1.5-ton size usually suits a small, well-insulated bungalow, a townhouse or a duplex unit with its own electric furnace. A larger house, or one that loses a lot of heat, will call for the next size up. The room-by-room load calculation settles it before the quote.\u003c\/p\u003e\u003ch3\u003eThe ducts of an older home\u003c\/h3\u003e\u003cp\u003eThe ducts of a bungalow built for an electric furnace alone were designed for warm air. Air conditioning and a heat pump generally require more airflow than the furnace does in heating, and the return air is often what limits the system. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote, as well as the number of returns and where they are.\u003c\/p\u003e\u003cp\u003eAnother change sometimes surprises people: the air a heat pump delivers in winter is milder than the air the electric furnace's elements used to blow. The house is no less warm for it, but the system runs longer and more gently. Tight ducts and unobstructed grilles make a real difference to that comfort.\u003c\/p\u003e\u003cp\u003eIf part of the ductwork runs through a garage, a crawl space or an attic, it must be insulated: in summer, a cold duct in a warm space becomes covered with condensation. We locate these sections during the visit and note them in the quote when they require work.\u003c\/p\u003e\u003ch3\u003eWinter, with the furnace's electric backup\u003c\/h3\u003e\u003cp\u003eIn fall, in spring and through a good part of winter, the heat pump heats alone. When the cold deepens, the heat it captures decreases while the home's needs increase, and the furnace's elements join in as backup. This pairing does not carry the cold-climate designation; in an ADD-ON system, the furnace's electric backup is there precisely for the coldest nights. The thermostat brings the elements in when the heat pump can no longer hold the set point, then takes them out as soon as it is enough again.\u003c\/p\u003e\u003cp\u003eThe moment the elements come in is set at the thermostat, according to your house and your comfort preferences. During defrost cycles, the furnace's elements may also heat for a few minutes so that the air from the grilles stays warm. We set these parameters with you at commissioning.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eHSH618GKA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X18M14A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility. No rating figure is therefore published on this page.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size; our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003egrant for efficient heat pumps\u003c\/a\u003e summarizes its conditions.\u003c\/p\u003e\u003ch2\u003eThe replacement, step by step\u003c\/h2\u003e\u003ch3\u003eFrom removing the old unit to commissioning\u003c\/h3\u003e\u003col\u003e\u003cli\u003e\u003cstrong\u003eVisit and load calculation\u003c\/strong\u003e: electric furnace and its elements, ducts, return air, electrical panel and location of the outdoor unit.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eRemoval of the old air conditioner\u003c\/strong\u003e: the refrigerant is recovered before disconnection, then the old coil is removed from the plenum.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eNew coil\u003c\/strong\u003e: the 14.5 in. coil is set on the furnace's air outlet; if the widths do not match, we fabricate a sealed transition. The condensate drain goes to a floor drain or a pump.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eOutdoor unit\u003c\/strong\u003e: on a bracket or a pad, above the snow line, where defrost water can drain without freezing on a walkway.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eRefrigerant line\u003c\/strong\u003e: new, or reused after verification, brazed, pressure tested and put under vacuum.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eElectrical and thermostat\u003c\/strong\u003e: \u003cstrong\u003ededicated circuit\u003c\/strong\u003e, outdoor disconnect, new thermostat and control wiring.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eCommissioning\u003c\/strong\u003e: refrigerant charge, airflow, defrost, setting of the electric backup, then an explanation of how it all works.\u003c\/li\u003e\u003c\/ol\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eThe furnace filter now works all year: check it every month and replace it according to its format. Unlike the old air conditioner, the outdoor unit is not covered in winter, since it heats; keep it clear of snow and leaves. Annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the coil, the condensate drain and the electrical connections also includes a check of the electric furnace and its elements. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003ch3\u003eWarranty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003cp\u003eKeep the invoice and the commissioning report, with the serial numbers of both units: they serve as the reference for any service request.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE HSH6 Premium | 1.5 Tons - 18,000 BTU (Coil EVD4X 14.5 in.) - R410A. We examine your current air conditioner, your furnace and your ducts, then confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67797964063012,"sku":"HSH618GKA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_HSH6_1_5_TONNES_18000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082539"},{"product_id":"thermopompe-centrale-add-on-arcoaire-h4h5s-ion-1-5-tonnes-18000-btu-serpentin-evd4x-14-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE H4H5S ION | 1.5 Tons - 18,000 BTU (Coil EVD4X 14.5 in.) - R410A","description":"\u003ch2\u003eA 14.5 in. coil that fits the electric furnace you already have\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eADD-ON\u003c\/strong\u003e system adds a heat pump to an existing \u003cstrong\u003eelectric furnace\u003c\/strong\u003e: a \u003cstrong\u003ecoil\u003c\/strong\u003e is installed on the furnace and the outdoor unit heats and cools through the same \u003cstrong\u003educts\u003c\/strong\u003e. The furnace's elements are only used as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE H4H5S ION | 1.5 Tons - 18,000 BTU (Coil EVD4X 14.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eH4H5S18AKAAA\u003c\/strong\u003e outdoor unit, from the ION series, with the \u003cstrong\u003eEVD4X18M14A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eThe whole project rests on one point: the electric furnace in place becomes the base of the new system. Its blower will move the heat pump's air, its air outlet will receive the coil and its duct network will distribute warmth as well as cool air. Before talking about the outdoor unit, we therefore look at the furnace.\u003c\/p\u003e\u003ch3\u003eWhat your furnace needs to offer\u003c\/h3\u003e\u003cp\u003eAn electric furnace can accept a heat pump coil, on a few conditions. It must be in good condition and still have several years of service ahead of it, and its heating elements must be reliable, since they will serve as backup: grafting a new system onto a furnace at the end of its life means reopening the job a few winters later. Its blower must be able to move the airflow the coil requires. And there must be room above the air outlet to set the coil and rebuild the plenum.\u003c\/p\u003e\u003cp\u003eWe check the condition of the electric furnace and its elements, the airflow of its blower and the duct sizes before the quote. If the furnace shows signs of advanced wear, we tell you frankly, and we present the option of a complete central system alongside.\u003c\/p\u003e\u003ch3\u003eThe 14.5 in. EVD4X coil\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eEVD4X18M14A\u003c\/strong\u003e coil sits on the furnace's air outlet, in the supply plenum, after the heating section. Its 14.5 in. dimension must match the furnace: when the two line up, the connection is direct; when they differ, we fabricate a sealed transition so that all the air passes through the coil with no leakage around it.\u003c\/p\u003e\u003cp\u003eHeight matters as much as width. In a basement with a low ceiling or a mechanical closet, the space between the top of the furnace and the joists can be tight; we measure it during the visit to plan how the plenum and duct take-offs are rebuilt. The coil also has its own pan and condensate drain, which we route to a floor drain or a pump with a steady slope.\u003c\/p\u003e\u003ch3\u003eThe furnace blower works for two\u003c\/h3\u003e\u003cp\u003eIn an ADD-ON system, the heat pump has no indoor blower of its own: the furnace blower pushes the air through the coil. Its settings must therefore suit a 1.5-ton coil, in cooling as in heating. Airflow that is too low makes the coil freeze in summer and reduces efficiency in winter; airflow that is too high makes the grilles whistle and removes less humidity. We adjust the blower speeds at commissioning and check the result at the grilles.\u003c\/p\u003e\u003ch3\u003eWhich homes this size suits\u003c\/h3\u003e\u003cp\u003eThe 1.5-ton size is meant for compact homes already equipped with a forced-air electric furnace: a small, well-insulated bungalow, a townhouse, a semi-detached house, or a duplex unit with its own furnace and its own ducts. With an ADD-ON system, the heat pump is chosen first according to cooling needs, since the furnace's elements cover the deep cold; a unit larger than necessary would cool in fits and starts.\u003c\/p\u003e\u003cp\u003eInsulation, windows, orientation and airtightness count as much as the size of the house. The room-by-room load calculation confirms the size before the quote.\u003c\/p\u003e\u003ch3\u003eSharing the seasons\u003c\/h3\u003e\u003cp\u003eA heat pump moves heat instead of producing it. In winter, its refrigerant, \u003cstrong\u003eR-410A\u003c\/strong\u003e, captures heat from the outdoor air and delivers it to the coil; in summer, a reversing valve flips the cycle and rejects the heat of the house outdoors. In fall, in spring and through a good part of winter, the heat pump heats alone. When the cold becomes too sharp for it, the thermostat brings in the furnace's electric elements as backup. This pairing does not carry the cold-climate designation: the furnace's electric backup remains there for the coldest nights.\u003c\/p\u003e\u003cp\u003eThe elements come in when the heat pump can no longer hold the set point, and the thermostat takes them out as soon as it is enough again. During defrost, the elements can also heat for a few minutes so that the air from the grilles stays warm.\u003c\/p\u003e\u003ch3\u003eDrier air in summer\u003c\/h3\u003e\u003cp\u003eIn cooling mode, the air passes through the cold coil, which removes heat and humidity at the same time. A properly sized unit runs long enough on each cycle to dry the air well. You notice it in the bedrooms, where sleep is more comfortable, and in the basement, where the damp smell recedes when the ducts serve it.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eH4H5S18AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X18M14A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility. For this reason, this page shows no rating figure.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size. The program's general conditions are on our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003egrant for efficient heat pumps\u003c\/a\u003e.\u003c\/p\u003e\u003ch2\u003eInstallation by AirGreen\u003c\/h2\u003e\u003ch3\u003eOutdoor unit and refrigerant line\u003c\/h3\u003e\u003cp\u003eThe outdoor unit goes on a wall bracket or a pad, above the snow line, away from roof drips, dryer vents and bedroom windows. We choose a spot where defrost water drains without freezing on a walkway and where the unit stays accessible for maintenance. The insulated copper line follows the shortest possible route to the coil; it is brazed, pressure tested and put under vacuum before the valves are opened.\u003c\/p\u003e\u003cp\u003eIn a townhouse or a semi-detached house, the side yard is often narrow and the neighbour's window is never far. Some municipalities also regulate where outdoor equipment may go. We take these constraints into account when choosing the location and present it to you before the work, so that the unit ends up neither under a gutter nor in front of a bedroom window.\u003c\/p\u003e\u003ch3\u003eElectrical, thermostat and commissioning\u003c\/h3\u003e\u003cp\u003eThe outdoor unit requires a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e and a nearby disconnect; in a house heated by an electric furnace, where the panel is often already heavily loaded, we check during the visit that it has the space needed. A compatible \u003cstrong\u003ethermostat\u003c\/strong\u003e decides when the heat pump heats alone and when the furnace's elements add backup heat; a furnace-only thermostat cannot do this, and we replace it.\u003c\/p\u003e\u003cp\u003eAt commissioning, we check the refrigerant charge, the airflow, defrost and how the electric backup comes in, then we set with you the moment the furnace's elements step in.\u003c\/p\u003e\u003ch3\u003eMaintenance and warranty\u003c\/h3\u003e\u003cp\u003eThe furnace filter now serves both appliances, summer and winter: check it every month and replace it according to its format. Keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the coil, the condensate drain and the electrical connections, in addition to a check of the electric furnace and its elements. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE H4H5S ION | 1.5 Tons - 18,000 BTU (Coil EVD4X 14.5 in.) - R410A. We examine your furnace, measure the space for the coil and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67797967077668,"sku":"H4H5S18AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_H4H5S_1_5_TONNES_18000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082528"},{"product_id":"thermopompe-centrale-add-on-arcoaire-n4h5s-performance-2-tonnes-24000-btu-serpentin-evd4x-14-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 2 Tons - 24,000 BTU (Coil EVD4X 14.5 in.) - R410A","description":"\u003ch2\u003eMake the electric furnace's elements run far less often\u003c\/h2\u003e\u003cp\u003eA house heated by an \u003cstrong\u003eelectric furnace\u003c\/strong\u003e runs its heating elements every time heat is called for, from fall to spring. The \u003cstrong\u003eADD-ON\u003c\/strong\u003e system changes that routine without removing the furnace: a \u003cstrong\u003ecoil\u003c\/strong\u003e is installed on the existing furnace and an outdoor unit heats and cools through the same \u003cstrong\u003educts\u003c\/strong\u003e. The furnace stays in place and its elements are only used as backup, for the cold the heat pump does not cover alone.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 2 Tons - 24,000 BTU (Coil EVD4X 14.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eN4H5S24AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X24M14A\u003c\/strong\u003e coil. This page focuses on what changes day to day when the heat pump takes over from the elements for most of the heating season.\u003c\/p\u003e\u003ch3\u003eA heat pump for most of the year\u003c\/h3\u003e\u003cp\u003eFrom September to late fall, then from spring until the first warm days, an electric furnace often starts for short periods just to chase away the morning chill. That is exactly the heat pump's territory: it takes over those hours by moving heat from the outdoor air, then keeps heating through a good part of winter. The furnace's elements only come on when the cold becomes too sharp for the heat pump, and spend most of the season at rest.\u003c\/p\u003e\u003cp\u003eIn summer, the same outdoor unit cools the whole house. For a home that had no central air conditioning, that is often the other half of the decision.\u003c\/p\u003e\u003ch3\u003eWhich homes the 2-ton size suits\u003c\/h3\u003e\u003cp\u003eThe 2-ton size is aimed at mid-sized homes already equipped with a forced-air electric furnace: a bungalow with a basement, a semi-detached house, a roomier townhouse or a modest cottage. With an ADD-ON system, the heat pump is sized first according to cooling needs, since the furnace's elements cover the deep cold. An oversized unit would cool in fits and starts and leave humidity in the air.\u003c\/p\u003e\u003cp\u003eHomes heated by an electric furnace and ducts are often older, and their envelope has sometimes been renovated piece by piece. Replaced windows, a re-insulated attic, a basement still unfinished: every detail counts. The room-by-room load calculation confirms whether 2 tons is the right size or whether to go one notch down or up.\u003c\/p\u003e\u003ch3\u003eHow the heat pump heats\u003c\/h3\u003e\u003cp\u003eA heat pump does not make its heat the way the furnace's elements do: it moves it. In winter, its refrigerant, \u003cstrong\u003eR-410A\u003c\/strong\u003e, captures the heat contained in the outdoor air; the compressor concentrates it and sends it to the coil sitting on the furnace. The furnace blower passes the house air through that coil, then into the ducts. In summer, a reversing valve flips the cycle and the heat of the house is rejected outdoors.\u003c\/p\u003e\u003ch3\u003eSharing with the furnace's elements\u003c\/h3\u003e\u003cp\u003eA compatible \u003cstrong\u003ethermostat\u003c\/strong\u003e decides when the heat pump heats alone and when the furnace's electric elements join in as backup. As long as the heat pump holds the set point, the elements stay off; when it is no longer enough, the thermostat brings them in, then takes them out as soon as it is enough again. During defrost, the elements can heat for a few minutes so that the air from the grilles stays warm.\u003c\/p\u003e\u003cp\u003eThe moment the backup comes in depends mainly on the cold at which the heat pump is no longer enough for your house, and on your comfort preferences. We set it with you at commissioning. This pairing does not carry the cold-climate designation: the furnace's electric backup remains there for the coldest nights.\u003c\/p\u003e\u003ch3\u003eWhat does not change\u003c\/h3\u003e\u003cp\u003eThe electric furnace, its elements, its blower and its ducts remain in place, since the furnace continues to serve. The ADD-ON system replaces neither its elements nor its blower: it connects to its air outlet and ties into its controls through the thermostat. Your furnace keeps its role as backup heat, and the heat pump takes on the rest.\u003c\/p\u003e\u003ch3\u003eCooling and dehumidification\u003c\/h3\u003e\u003cp\u003eIn cooling mode, the cold coil removes heat and humidity from the house air. The condensed water flows through a drain to a floor drain or a pump. A well-chosen size runs long enough on each cycle to dry the air, which makes the house more comfortable at the same temperature and helps a basement served by the ducts stay drier.\u003c\/p\u003e\u003cp\u003eA house designed for an electric furnace alone sometimes has few return air openings. Cooling is more demanding on this point: without a return, a closed bedroom stays warmer than the rest of the house. We check the returns during the visit and, where needed, propose an additional return in the quote.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eN4H5S24AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X24M14A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility. We therefore publish no rating figure for this pairing.\u003c\/p\u003e\u003cp\u003eOnce the ratings are confirmed, HSPF2 will be the most telling one for you: it measures the heat pump's seasonal heating efficiency. SEER2 measures cooling efficiency over a summer, and EER2 the efficiency on a heat-wave day. In an ADD-ON system, these ratings describe the heat pump; the furnace's elements, for their part, still give back as heat the electricity they use, and no more.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003egrant for efficient heat pumps\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eWhat we do on site\u003c\/h2\u003e\u003ch3\u003eThe visit\u003c\/h3\u003e\u003cp\u003eWe check the condition of the electric furnace and its elements, the airflow of its blower and the duct sizes before the quote. An older electric furnace may have a blower that is barely enough for the airflow a 2-ton coil requires; we confirm this before proposing this size. We also measure the air outlet and the clearance above the furnace: the 14.5 in. coil must line up with it, or we plan a sealed transition. Finally, we look at the electrical panel: in a home heated by an electric furnace, it is often already heavily loaded, and the outdoor unit must find its circuit there.\u003c\/p\u003e\u003ch3\u003eThe work\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eCoil\u003c\/strong\u003e: set on the furnace's air outlet, connected to the plenum, with its condensate drain to a floor drain or a pump.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eOutdoor unit\u003c\/strong\u003e: on a bracket or a pad, above the snow line, away from roof drips and bedroom windows.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eRefrigerant line\u003c\/strong\u003e: insulated copper, brazing, pressure test and vacuum.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eElectrical\u003c\/strong\u003e: \u003cstrong\u003ededicated circuit\u003c\/strong\u003e, outdoor disconnect and thermostat wiring.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eCommissioning\u003c\/strong\u003e: refrigerant charge, airflow, defrost and setting of the electric backup.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eMaintenance and warranty\u003c\/h3\u003e\u003cp\u003eThe furnace filter now works all year: check it every month and replace it according to its format. Keep the outdoor unit clear of snow and leaves. Plan annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the coil, the condensate drain and the electrical connections, in addition to a check of the electric furnace and its elements. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 2 Tons - 24,000 BTU (Coil EVD4X 14.5 in.) - R410A. We examine your furnace, your ducts and your electrical panel, then confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67797967143204,"sku":"N4H5S24AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_N4H5S_2_TONNES_24000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082539"},{"product_id":"thermopompe-centrale-add-on-arcoaire-r4h5s-economique-2-tonnes-24000-btu-serpentin-evd4x-14-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 2 Tons - 24,000 BTU (Coil EVD4X 14.5 in.) - R410A","description":"\u003ch2\u003eCool the whole bungalow and let the heat pump heat as long as the weather allows\u003c\/h2\u003e\u003cp\u003eIn a house heated by an \u003cstrong\u003eelectric furnace\u003c\/strong\u003e, the project often starts with the wish to finally have \u003cstrong\u003ecentral air conditioning\u003c\/strong\u003e. The \u003cstrong\u003eADD-ON\u003c\/strong\u003e system meets that request and goes further: a \u003cstrong\u003ecoil\u003c\/strong\u003e is installed on the existing furnace and the outdoor unit cools in summer, then heats the house through the same \u003cstrong\u003educts\u003c\/strong\u003e for a good part of the year. The furnace's elements are only used as backup.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 2 Tons - 24,000 BTU (Coil EVD4X 14.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eR4H5S24AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X24M14A\u003c\/strong\u003e coil. The R4H5S series is the entry level of this Arcoaire family; at 2 tons, it is aimed at the typical bungalow with a basement.\u003c\/p\u003e\u003ch3\u003eA heat pump rather than a plain air conditioner\u003c\/h3\u003e\u003cp\u003eOn the job site, a central air conditioner and an ADD-ON heat pump look very much alike: an outdoor unit, a copper line, a coil on the furnace and a thermostat. The difference lies in a reversing valve. The air conditioner can only reject the heat of the house outdoors; the heat pump can also do the opposite and capture heat from the outdoor air to heat the house.\u003c\/p\u003e\u003cp\u003eIn practice, the heat pump takes over fall, spring and a good part of winter. The electric furnace's elements stay ready for the deep cold. You gain air conditioning and give those elements far fewer operating hours.\u003c\/p\u003e\u003ch3\u003eWhich bungalows this size suits\u003c\/h3\u003e\u003cp\u003eThe 2-ton size is meant for mid-sized homes that already have a forced-air electric furnace: a bungalow with a basement, a semi-detached house, a roomy townhouse. With an ADD-ON system, the heat pump is sized first according to cooling needs, since the furnace's elements cover the deep cold. Bigger is not better: an oversized unit reaches the setpoint too fast and leaves humidity in the air.\u003c\/p\u003e\u003cp\u003eTwo bungalows of the same size can have very different needs. A well-insulated attic, recent windows and an orientation sheltered from the afternoon sun reduce the cooling load; a large west-facing picture window increases it. We do the load calculation, room by room, before confirming the size.\u003c\/p\u003e\u003ch3\u003eSummer comfort, room by room\u003c\/h3\u003e\u003cp\u003eThe heat pump cools every room served by the ducts. Cool air comes out of the existing grilles and returns to the furnace through the return air openings. In a bungalow, bedrooms facing south or west are often the warmest at the end of the day; we check that each one has enough supply and a return path, even with the door closed.\u003c\/p\u003e\u003cp\u003eThe basement also benefits from the system, but it needs little cooling. The dampers on the grilles let you reduce the air there and send more toward the main floor. We do this initial balancing at commissioning.\u003c\/p\u003e\u003ch3\u003eHumidity, the other half of comfort\u003c\/h3\u003e\u003cp\u003eIn cooling mode, the cold coil condenses the humidity in the air, and the water flows through a drain to a floor drain or a pump. A house at the right humidity feels cooler at the same temperature. That is one of the reasons a right-sized unit is better than an oversized one: it runs long enough on each cycle to remove humidity, instead of cooling the air without drying it.\u003c\/p\u003e\u003cp\u003eIf a humidifier is mounted on the furnace plenum, its location has to be reviewed since the coil is installed in that spot. We identify it during the visit and plan its relocation.\u003c\/p\u003e\u003ch3\u003eWinter with an electric furnace\u003c\/h3\u003e\u003cp\u003eA compatible \u003cstrong\u003ethermostat\u003c\/strong\u003e decides when the heat pump heats alone and when the furnace's elements join in as backup. As long as the heat pump holds the set point, it heats alone; when it is no longer enough, the thermostat brings in the electric elements, then takes them out as soon as it is enough again. The moment the backup comes in is set according to your house and your comfort preferences; we set it with you at commissioning.\u003c\/p\u003e\u003cp\u003eThis pairing does not carry the cold-climate designation. That is not a flaw in an ADD-ON system: when the cold becomes too sharp for the heat pump, the furnace's elements supplement the heat. You will simply notice that the air from the grilles is milder when the heat pump is heating than when the elements are running, and that cycles are longer. During defrost, the elements may heat for a few minutes to avoid a draft of cool air.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eR4H5S24AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X24M14A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility. This page therefore gives no rating figure.\u003c\/p\u003e\u003cp\u003eWhen these ratings are confirmed, keep this in mind: SEER2 describes cooling efficiency over an entire season, EER2 its efficiency on a hot day at full demand, and HSPF2 the heat pump's heating efficiency over a season. They apply to the combination formed by the outdoor unit and the coil, and that precise combination is what we write into the quote.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003egrant for efficient heat pumps\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eInstallation on an electric furnace\u003c\/h2\u003e\u003ch3\u003eBefore the quote\u003c\/h3\u003e\u003cp\u003eWe check the condition of the electric furnace and its elements, the airflow of its blower and the duct sizes before the quote. The blower must be able to move the air a 2-ton coil needs, and the return air must keep up. We measure the furnace's air outlet and the free space above it: the 14.5 in. coil must line up with it, or we plan a sealed transition. The ADD-ON system replaces neither the furnace's elements nor its blower; it connects to its air outlet and its controls.\u003c\/p\u003e\u003cp\u003eWe also look at the electrical panel. In a house heated by an electric furnace, it is often already heavily loaded and does not always have free space for the outdoor unit's breaker, and it is better to know this at the visit than on the day of the work.\u003c\/p\u003e\u003ch3\u003eThe work\u003c\/h3\u003e\u003cp\u003eThe coil is set on the furnace and connected to the plenum, with its condensate drain. Outside, the unit goes on a bracket or a pad, above the snow line, away from roof drips and dryer vents, where defrost water will not freeze on a walkway. The insulated copper line connects the two; we braze it, pressure test it and pull a vacuum before opening the valves.\u003c\/p\u003e\u003cp\u003eOn the electrical side, the outdoor unit gets a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e and a disconnect, and the new thermostat is wired to the furnace and the outdoor unit. Commissioning comes last: refrigerant charge, airflow, defrost, setting of the electric backup and an explanation of the thermostat.\u003c\/p\u003e\u003ch3\u003eMaintenance and warranty\u003c\/h3\u003e\u003cp\u003eThe furnace filter now works summer and winter: check it every month and replace it according to its format. Keep the outdoor unit clear of snow and leaves, with no cover in winter since it heats. Plan annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the coil, the condensate drain and the electrical connections, in addition to a check of the electric furnace and its elements. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 2 Tons - 24,000 BTU (Coil EVD4X 14.5 in.) - R410A. We assess your bungalow room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67797967208740,"sku":"R4H5S24AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_R4H5S_2_TONNES_24000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082540"},{"product_id":"thermopompe-centrale-add-on-arcoaire-hsh6-haut-de-gamme-2-tonnes-24000-btu-serpentin-evd4x-14-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE HSH6 Premium | 2 Tons - 24,000 BTU (Coil EVD4X 14.5 in.) - R410A","description":"\u003ch2\u003eA two-level cottage, ducts already in place and a more even temperature from one level to the next\u003c\/h2\u003e\u003cp\u003eIn a cottage heated by a forced-air \u003cstrong\u003eelectric furnace\u003c\/strong\u003e, the temperature gap between the main floor and the upper floor returns every summer: the upstairs bedrooms hold the day's heat while the basement stays cool. The \u003cstrong\u003eADD-ON\u003c\/strong\u003e system brings air conditioning through the existing \u003cstrong\u003educts\u003c\/strong\u003e and hands most of the year's heating to the heat pump rather than the elements, without removing the furnace.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE HSH6 Premium | 2 Tons - 24,000 BTU (Coil EVD4X 14.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eHSH624GKA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003ecoil\u003c\/strong\u003e \u003cstrong\u003eEVD4X24M14A\u003c\/strong\u003e. The HSH6 series is presented as the premium tier of this Arcoaire family. In a cottage, the choice of equipment matters, but the way the air reaches the upper floor matters just as much.\u003c\/p\u003e\u003ch3\u003eWhat the ADD-ON system does\u003c\/h3\u003e\u003cp\u003eThe coil is installed on the furnace's air outlet, and an outdoor unit is connected to it by a copper line. In summer, the \u003cstrong\u003eR-410A\u003c\/strong\u003e refrigeration circuit removes heat and humidity from the air passing through the coil. In winter, a reversing valve flips the cycle: the heat pump captures heat from the outdoor air and delivers it to the coil. In both cases, the furnace blower pushes the air into the ducts. The furnace's electric elements are only used as backup, for the deep cold.\u003c\/p\u003e\u003ch3\u003eWhich cottages the 2-ton size suits\u003c\/h3\u003e\u003cp\u003eThe 2-ton size is aimed at a modest cottage, a two-level townhouse with a basement or a semi-detached house, provided the envelope is reasonably insulated. With an ADD-ON system, the heat pump is sized first on cooling, since the furnace's elements cover the coldest nights. A larger cottage, or one whose upper floor sits under a poorly insulated roof, may call for the next size up.\u003c\/p\u003e\u003cp\u003eThe room-by-room load calculation takes into account what weighs most in a cottage: the attic above the bedrooms, windows exposed to the afternoon sun and air leaks around the upstairs windows. It is what confirms the size before the quote.\u003c\/p\u003e\u003ch3\u003eWhy the upper floor stays warmer in summer\u003c\/h3\u003e\u003cp\u003eA cottage's upper floor receives heat from the roof, and the warm air of the house accumulates there. The original ducts were designed for the furnace: they send warm air to grilles often located low on the walls, and that air naturally ends up rising to the upper floor. In cooling, the logic reverses. Cool air, being heavier, tends to stay down, and the upper floor only gets its share if the ducts going up are large enough and if the air can return to the furnace.\u003c\/p\u003e\u003cp\u003eDuring the visit, we therefore check the number and size of the supplies serving the upper floor, whether there are return air openings upstairs, and the condition of ducts running through walls or the attic.\u003c\/p\u003e\u003ch3\u003eReturn air upstairs\u003c\/h3\u003e\u003cp\u003eA cottage built for an electric furnace alone sometimes has a single return, on the main floor or in the basement. In heating, that works; in cooling, the warm air built up upstairs has no path back to the coil. A closed bedroom without a return becomes the warmest room in the house. Depending on the layout, an additional return upstairs, a transfer grille or a clearance under the doors improves things noticeably; we state in the quote what your house requires.\u003c\/p\u003e\u003ch3\u003eBalancing airflow by season\u003c\/h3\u003e\u003cp\u003eThe dampers on the grilles and main ducts let you split the air between levels. In summer, more is sent upstairs and less to the basement; in winter, you can return to a more even setting. We do an initial balancing at commissioning and show you where the dampers are. The fan circulation mode offered by most thermostats can also help narrow the gap between levels during hot spells.\u003c\/p\u003e\u003cp\u003eOne precaution: avoid fully closing a large number of grilles in the basement. The coil needs enough airflow to work properly; too many closed grilles starve it of that air, make the remaining ones whistle and can cause the coil to freeze in cooling mode. Better to reduce than to close.\u003c\/p\u003e\u003ch3\u003eHeating with the heat pump, then with the electric backup\u003c\/h3\u003e\u003cp\u003eIn fall, in spring and through a good part of winter, the heat pump heats alone. When the cold becomes too sharp for it, a compatible \u003cstrong\u003ethermostat\u003c\/strong\u003e brings in the furnace's electric elements as backup, then takes them out as soon as the heat pump is enough again. This pairing does not carry the cold-climate designation; in an ADD-ON system, the furnace's electric backup is precisely what covers the coldest nights.\u003c\/p\u003e\u003cp\u003eThe air the heat pump delivers is milder than the air from the furnace's elements, and the cycles are longer. In a cottage, this gentler operation mixes the air between levels for longer. During defrost, the furnace's elements may heat for a few minutes so that the air from the grilles stays warm.\u003c\/p\u003e\u003ch3\u003eDehumidification in summer\u003c\/h3\u003e\u003cp\u003eThe cold coil removes humidity from the air, and the condensed water flows through a drain to a floor drain or a pump. A right-sized unit runs long enough on each cycle to dry the air well; upstairs, under a roof warmed by the sun, that difference is felt from the first hot night.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eHSH624GKA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X24M14A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility. That is why no rating figure appears on this page.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003egrant for efficient heat pumps\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eInstallation in a cottage\u003c\/h2\u003e\u003ch3\u003eFrom the visit to commissioning\u003c\/h3\u003e\u003cp\u003eWe check the condition of the electric furnace and its elements, the airflow of its blower and the duct sizes before the quote. The blower must be able to push air all the way to the upstairs bedrooms through a 2-ton coil. The 14.5 in. coil is set on the furnace's air outlet; if it does not line up, we fabricate a sealed transition. Its condensate drain goes to a floor drain or a pump.\u003c\/p\u003e\u003cp\u003eThe outdoor unit goes on a bracket or a pad, above the snow line, away from roof drips and bedroom windows, and it gets a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e with a disconnect. The insulated copper line is brazed, pressure tested and put under vacuum. The thermostat goes in a central room on the main floor, out of direct sun and drafts. Commissioning includes the refrigerant charge, airflow, defrost, the setting of the electric backup and balancing of the dampers.\u003c\/p\u003e\u003ch3\u003eMaintenance and warranty\u003c\/h3\u003e\u003cp\u003eThe furnace filter now works all year: check it every month and replace it according to its format. Keep the outdoor unit clear of snow and leaves. Plan annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the coil, the condensate drain and the electrical connections, in addition to a check of the electric furnace and its elements. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE HSH6 Premium | 2 Tons - 24,000 BTU (Coil EVD4X 14.5 in.) - R410A. We assess the cottage room by room, from the upper floor to the basement, and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67797967405348,"sku":"HSH624GKA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_HSH6_2_TONNES_24000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082539"},{"product_id":"thermopompe-centrale-add-on-arcoaire-h4h5s-ion-2-tonnes-24000-btu-serpentin-evd4x-14-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE H4H5S ION | 2 Tons - 24,000 BTU (Coil EVD4X 14.5 in.) - R410A","description":"\u003ch2\u003eKeep an electric furnace in good condition and leave its elements only the deep cold\u003c\/h2\u003e\u003cp\u003eA well-maintained \u003cstrong\u003eelectric furnace\u003c\/strong\u003e often still has good years ahead of it. The \u003cstrong\u003eADD-ON\u003c\/strong\u003e system makes use of that: instead of replacing it, a \u003cstrong\u003ecoil\u003c\/strong\u003e and an outdoor unit are added that heat and cool through the same \u003cstrong\u003educts\u003c\/strong\u003e. Its elements are only used as backup, during the cold the heat pump does not cover alone, and they run far fewer hours per year.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE H4H5S ION | 2 Tons - 24,000 BTU (Coil EVD4X 14.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eH4H5S24AKAAA\u003c\/strong\u003e outdoor unit, from the ION series, with the \u003cstrong\u003eEVD4X24M14A\u003c\/strong\u003e coil. Before proposing it, we first check one thing: that your electric furnace deserves to stay in place for the years ahead. That finding guides the whole project.\u003c\/p\u003e\u003ch3\u003eADD-ON or complete system: the starting point\u003c\/h3\u003e\u003cp\u003eThe ADD-ON system makes sense when the furnace is in good condition, its blower can move the airflow of a 2-ton coil and the ducts are adequate. You then keep an appliance that works, add air conditioning, and the heat pump takes over most of the heating.\u003c\/p\u003e\u003cp\u003eIf the furnace is nearing the end of its life, the logic changes. Grafting a new coil onto an appliance that will need replacing in a few winters means redoing part of the work at that point. In that case, we also present the option of a complete central system, and you choose knowing both.\u003c\/p\u003e\u003ch3\u003eSigns of a furnace that can stay\u003c\/h3\u003e\u003cp\u003eA few clues help judge. A furnace serviced every year, without repeated breakdowns, whose blower starts and runs without unusual noise, is generally a good candidate. A previous maintenance report, if you have one, is valuable: it describes the condition of the blower, the heating elements and their connections. Those elements matter most of all, since they become the heat pump's backup.\u003c\/p\u003e\u003cp\u003eOn our side, we check the condition of the electric furnace and its elements, the airflow of its blower and the duct sizes before the quote. If we see signs of advanced wear, we tell you before you sign.\u003c\/p\u003e\u003ch3\u003eWhat the ADD-ON system adds\u003c\/h3\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and the outdoor unit is connected to it by a copper line. A heat pump does not produce its heat, it moves it: in winter, its refrigerant, \u003cstrong\u003eR-410A\u003c\/strong\u003e, captures heat from the outdoor air and delivers it to the coil; in summer, a reversing valve flips the cycle and rejects the heat of the house outdoors. The furnace blower pushes the air through the coil and into the ducts, whatever the season.\u003c\/p\u003e\u003cp\u003eInside the house, little changes: the grilles, the ducts and the location of the filter stay the same. What changes is the thermostat, which now controls the heat pump and the electric backup, and the outdoor unit, which also runs in winter. The air coming out of the grilles when the heat pump is heating is milder than the air from the furnace's elements, and the cycles are longer: that is normal heat pump operation.\u003c\/p\u003e\u003ch3\u003eWhich homes this size suits\u003c\/h3\u003e\u003cp\u003eThe 2-ton size is aimed at mid-sized homes equipped with a forced-air electric furnace: a bungalow with a basement, a semi-detached house, a roomy townhouse or a modest cottage. With an ADD-ON system, the heat pump is sized first on cooling, since the furnace's elements cover the deep cold; an oversized unit would cool in fits and starts and leave humidity in the air. Insulation, windows, orientation and the airtightness of the house count as much as its size, and the room-by-room load calculation confirms the size.\u003c\/p\u003e\u003ch3\u003eEach appliance's role through the year\u003c\/h3\u003e\u003cp\u003eIn fall, the heat pump takes over heating from the first cool evenings. Through a good part of winter, it keeps heating alone. When the cold becomes too sharp for it, the furnace's elements join in as backup and cover the coldest nights; this pairing does not carry the cold-climate designation, and that is precisely the role of the electric backup in an ADD-ON system. In spring, the heat pump takes back control. In summer, it cools and dehumidifies the whole house.\u003c\/p\u003e\u003cp\u003eThe result: the furnace's elements, which used to heat from October to May, now serve only during the coldest periods. They wear more slowly, and the heat pump covers most of the year.\u003c\/p\u003e\u003ch3\u003eThe thermostat that coordinates the two\u003c\/h3\u003e\u003cp\u003eA compatible \u003cstrong\u003ethermostat\u003c\/strong\u003e decides when the heat pump heats alone and when the furnace's elements join in as backup. As long as the heat pump holds the set point, the elements stay off; when it is no longer enough, the thermostat brings them in, then takes them out as soon as it is enough again. During defrost, the elements can heat for a few minutes so that the air from the grilles stays warm.\u003c\/p\u003e\u003cp\u003eThe moment the backup comes in is set according to your house and your comfort preferences. We set it with you at commissioning and show you how to change it.\u003c\/p\u003e\u003ch3\u003eCooling and humidity\u003c\/h3\u003e\u003cp\u003eIn cooling mode, the cold coil removes heat and humidity from the air; the water flows through a drain to a floor drain or a pump. A right-sized unit runs long enough on each cycle to dry the air, which makes the house more comfortable at the same temperature. We also check the return air: a closed bedroom without a return stays warmer than the rest of the house.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eH4H5S24AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X24M14A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility. This page therefore shows no rating figure.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003egrant for efficient heat pumps\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eInstallation and follow-up\u003c\/h2\u003e\u003ch3\u003eThe installation\u003c\/h3\u003e\u003cp\u003eThe 14.5 in. coil is set on the furnace's air outlet; if it does not line up with it, we fabricate a sealed transition. Its condensate drain goes to a floor drain or a pump. The outdoor unit is installed on a bracket or a pad, above the snow line, away from roof drips and dryer vents. The insulated copper line is brazed, pressure tested and put under vacuum before the valves are opened.\u003c\/p\u003e\u003cp\u003eThe outdoor unit gets a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e and a disconnect, and the new thermostat is wired to the furnace and the outdoor unit. At commissioning, we check the refrigerant charge, airflow, defrost and how the electric backup comes in.\u003c\/p\u003e\u003ch3\u003eMaintaining both appliances\u003c\/h3\u003e\u003cp\u003eAn ADD-ON system has two appliances, and each deserves its maintenance. The electric furnace needs a check of its blower, its elements and their connections. The heat pump requires annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the coil, the condensate drain and the electrical connections. Between visits, check the filter every month, since it now works all year, and keep the outdoor unit clear of snow and leaves. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE H4H5S ION | 2 Tons - 24,000 BTU (Coil EVD4X 14.5 in.) - R410A. We examine your furnace with you and confirm whether the ADD-ON system is the right choice, the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67798075048228,"sku":"H4H5S24AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_H4H5S_2_TONNES_24000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082528"},{"product_id":"thermopompe-centrale-add-on-arcoaire-hch6-2-stages-2-tonnes-24000-btu-serpentin-evd4x-14-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE HCH6 2 stages | 2 Tons - 24,000 BTU (Coil EVD4X 14.5 in.) - R410A","description":"\u003ch2\u003eA two-stage compressor, added to the furnace you keep\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eADD-ON\u003c\/strong\u003e system adds a heat pump to an existing \u003cstrong\u003eelectric furnace\u003c\/strong\u003e: a \u003cstrong\u003ecoil\u003c\/strong\u003e is installed on the furnace and the outdoor unit heats and cools through the same \u003cstrong\u003educts\u003c\/strong\u003e. The furnace is only used as backup: its electric elements take over in deep cold. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE HCH6 2 stages | 2 Tons - 24,000 BTU (Coil EVD4X 14.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eHCH624GKA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X24M14A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eWhat sets the HCH6 series apart is in its name: its \u003cstrong\u003etwo-stage compressor\u003c\/strong\u003e. In an ADD-ON installation, this detail has concrete consequences for the choice of thermostat, the settings of the furnace blower and commissioning. This page goes through them, along with what the installation includes.\u003c\/p\u003e\u003ch3\u003eWhat \"two-stage\" means\u003c\/h3\u003e\u003cp\u003eA single-stage compressor works one way only: it is either running or off. A two-stage compressor has two operating levels, a reduced level and full capacity, and the system chooses according to demand. On a mild day, the reduced level may be enough; when demand rises, the second stage comes in.\u003c\/p\u003e\u003cp\u003eThis operation is not continuous modulation: there are two levels, no more. But to take advantage of it, the whole chain has to follow, from the thermostat to the furnace blower. That is where the quality of a two-stage ADD-ON installation is decided.\u003c\/p\u003e\u003ch3\u003eThe thermostat has to follow\u003c\/h3\u003e\u003cp\u003eA furnace-only thermostat cannot control a heat pump, let alone a two-stage heat pump paired with a furnace. The thermostat we install must manage three things: the two compressor stages, the reversing valve that switches the heat pump from heating to cooling, and calling in the furnace's electric elements, as auxiliary heat, when the cold becomes too sharp. An incompatible thermostat can leave the compressor on a single level, which cancels out the point of the series.\u003c\/p\u003e\u003cp\u003eThe wiring matters too: between the thermostat, the furnace and the outdoor unit, there must be enough conductors to carry each of these signals. We assess it during the visit and add the missing wiring where needed.\u003c\/p\u003e\u003ch3\u003eThe furnace blower and the two levels\u003c\/h3\u003e\u003cp\u003eIn an ADD-ON system, the furnace blower is what pushes the air through the coil. With a two-stage compressor, the airflow must match the level in use: airflow suited to the reduced level, higher airflow at full capacity. Depending on the furnace, these settings are made on its control board or through the wiring of the motor speeds. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote, and we confirm that the furnace can provide these settings.\u003c\/p\u003e\u003ch3\u003eWhich homes this size suits\u003c\/h3\u003e\u003cp\u003eThe 2-ton size is aimed at mid-sized homes already equipped with a forced-air electric furnace: a bungalow with a basement, a semi-detached house, a roomy townhouse or a modest cottage. With an ADD-ON system, the heat pump is sized first on cooling, since the furnace's elements cover the deep cold. An oversized unit would spend its time starting and stopping, even with two stages.\u003c\/p\u003e\u003cp\u003eInsulation, windows, orientation and airtightness change the needs from one house to the next, at equal size. The room-by-room load calculation confirms the size before the quote.\u003c\/p\u003e\u003ch3\u003eWinter: the heat pump, then the furnace\u003c\/h3\u003e\u003cp\u003eA heat pump moves heat instead of producing it. In winter, its refrigerant, \u003cstrong\u003eR-410A\u003c\/strong\u003e, captures heat from the outdoor air and delivers it to the coil. In fall, in spring and through a good part of winter, it heats alone. When the cold becomes too sharp, the \u003cstrong\u003ethermostat\u003c\/strong\u003e brings in the furnace's \u003cstrong\u003eelectric elements\u003c\/strong\u003e as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e. This pairing does not carry the cold-climate designation; the furnace's elements cover the coldest nights.\u003c\/p\u003e\u003cp\u003eEvery hour the heat pump heats alone is an hour those elements stay off: that is what lightens the electric furnace's load over the winter. During defrost, the elements can heat for a few minutes so that the air from the grilles stays warm. The moment auxiliary heat comes in is set according to your house, its insulation and your comfort.\u003c\/p\u003e\u003cp\u003eIn heating, the thermostat follows a sequence: the heat pump's reduced level first, full capacity when demand rises, then the furnace's electric elements once the heat pump is no longer enough. Properly set, this sequence avoids calling auxiliary heat too early on a cool morning, while letting it take over without hesitation when the cold sets in for good.\u003c\/p\u003e\u003ch3\u003eSummer: cooling and humidity\u003c\/h3\u003e\u003cp\u003eIn summer, a reversing valve flips the cycle and the heat of the house is rejected outdoors. The cold coil also removes humidity from the air, and the condensed water flows through a drain to a floor drain or a pump. On days when the reduced level is enough, the system runs in longer cycles, which helps keep the air dry; during a heat wave, the second stage takes over.\u003c\/p\u003e\u003cp\u003eWe also check the return air. A closed bedroom without a return stays warmer than the rest of the house, whatever the compressor.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eHCH624GKA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X24M14A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility. No rating figure therefore appears on this page.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003egrant for efficient heat pumps\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eInstallation by AirGreen\u003c\/h2\u003e\u003ch3\u003eThe 14.5 in. coil and the work\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eCoil\u003c\/strong\u003e: set on the furnace's air outlet; if the widths do not match, we fabricate a sealed transition. The condensate drain goes to a floor drain or a pump.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eOutdoor unit\u003c\/strong\u003e: on a bracket or a pad, above the snow line, away from roof drips, dryer vents and bedroom windows.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eRefrigerant line\u003c\/strong\u003e: insulated copper, brazing, pressure test and vacuum before the valves are opened.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eElectrical\u003c\/strong\u003e: \u003cstrong\u003ededicated circuit\u003c\/strong\u003e, outdoor disconnect and control wiring for both stages and the furnace; we check that the panel can carry both the heat pump and the electric furnace's elements.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eThermostat\u003c\/strong\u003e: a model compatible with a two-stage heat pump paired with an electric furnace.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eCommissioning for each level\u003c\/h3\u003e\u003cp\u003eAt commissioning, we check the refrigerant charge and the airflow at the reduced level as well as at full capacity, in heating as in cooling. We test defrost, the furnace's electric elements coming in and the stage sequence controlled by the thermostat. We then set with you the moment electric auxiliary heat takes over, and show you how to read the screen.\u003c\/p\u003e\u003ch3\u003eMaintenance and warranty\u003c\/h3\u003e\u003cp\u003eThe furnace filter now works all year: check it every month and replace it according to its format. Keep the outdoor unit clear of snow and leaves. Plan annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the coil, the condensate drain and the electrical connections, in addition to a check of the electric furnace, its elements and its blower. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE HCH6 2 stages | 2 Tons - 24,000 BTU (Coil EVD4X 14.5 in.) - R410A. We check your electric furnace, your thermostat and your ducts, then confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67798081569060,"sku":"HCH624GKA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_HCH6_2_TONNES_24000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082539"},{"product_id":"thermopompe-centrale-add-on-arcoaire-h4h7t-ion-2-stages-2-tonnes-24000-btu-serpentin-evd4x-14-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE H4H7T ION 2 stages | 2 Tons - 24,000 BTU (Coil EVD4X 14.5 in.) - R410A","description":"\u003ch2\u003eA two-stage heat pump whose ratings are confirmed with your furnace\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eADD-ON\u003c\/strong\u003e system adds a heat pump to an existing \u003cstrong\u003eelectric furnace\u003c\/strong\u003e: a \u003cstrong\u003ecoil\u003c\/strong\u003e is installed on the furnace and the outdoor unit heats and cools through the same \u003cstrong\u003educts\u003c\/strong\u003e. The furnace is only used as backup, through its electric elements. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE H4H7T ION 2 stages | 2 Tons - 24,000 BTU (Coil EVD4X 14.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eH4H7T24AKAAA\u003c\/strong\u003e outdoor unit, from the ION series, with the \u003cstrong\u003eEVD4X24M14A\u003c\/strong\u003e coil, with a \u003cstrong\u003etwo-stage compressor\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThis pairing has a particularity: its ratings are not read on their own, they are read with the furnace it will be installed on. That is why your furnace's model is the first thing we note during the visit.\u003c\/p\u003e\u003ch3\u003eRatings that depend on the furnace\u003c\/h3\u003e\u003cp\u003eThe AHRI certification directory lists the pairing of the \u003cstrong\u003eH4H7T24AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X24M14A\u003c\/strong\u003e coil only with specific furnaces: the SEER2 and HSPF2 ratings depend on the blower of the furnace in place. We confirm them with your furnace model before the quote. This page therefore publishes no rating figure: it could not apply to every furnace.\u003c\/p\u003e\u003cp\u003eThis comes from the very way an ADD-ON system works. In this type of installation, the heat pump has no indoor blower of its own: the furnace blower is what moves the air through the coil. The airflow and the power use of that blower are part of the system's efficiency, just like the outdoor unit.\u003c\/p\u003e\u003ch3\u003eYour furnace's model\u003c\/h3\u003e\u003cp\u003eThe furnace's model number appears on its nameplate, usually inside the access panel or on the side of the cabinet. If you send us a legible photo before the visit, we can start the check sooner; otherwise, we note it on site. We then check whether your furnace is among the combinations listed with this pairing. If it is not, we tell you before the quote and present the options, rather than putting forward ratings that would not apply to your home.\u003c\/p\u003e\u003ch3\u003eThe two-stage compressor\u003c\/h3\u003e\u003cp\u003eA single-stage compressor is either running or off. The H4H7T series compressor has two stages: a reduced level and full capacity, chosen according to demand. To benefit from it, the thermostat must be able to control both heat pump stages and calling in the furnace's electric elements, and the furnace blower must provide airflow suited to each level. A furnace-only thermostat cannot do this; we replace it with a compatible model and add the missing wiring where needed.\u003c\/p\u003e\u003ch3\u003eWhich homes this size suits\u003c\/h3\u003e\u003cp\u003eThe 2-ton size is aimed at mid-sized homes equipped with a forced-air electric furnace: a bungalow with a basement, a semi-detached house, a roomy townhouse or a modest cottage. With an ADD-ON system, the heat pump is sized first on cooling, since the furnace's elements cover the deep cold. A unit that is too large would run in short cycles and remove humidity poorly, even with two stages.\u003c\/p\u003e\u003cp\u003eAt equal size, a well-insulated house and a house that loses a lot of heat do not have the same needs. The room-by-room load calculation confirms the size before the quote.\u003c\/p\u003e\u003ch3\u003eSharing between the heat pump and the furnace\u003c\/h3\u003e\u003cp\u003eA heat pump moves heat instead of producing it: in winter, its refrigerant, \u003cstrong\u003eR-410A\u003c\/strong\u003e, captures heat from the outdoor air and delivers it to the coil. The \u003cstrong\u003ethermostat\u003c\/strong\u003e follows a sequence: the reduced level first, full capacity when demand rises, then the furnace's \u003cstrong\u003eelectric elements\u003c\/strong\u003e, as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e, when the cold becomes too sharp for the heat pump. This pairing does not carry the cold-climate designation; the furnace's elements cover the coldest nights.\u003c\/p\u003e\u003cp\u003eAs long as the heat pump is enough, the electric furnace's elements stay off; they come in only to top up the heat when demand exceeds what the heat pump can deliver. During defrost, they can also heat for a few minutes so that the air from the grilles stays warm. The moment auxiliary heat comes in is set with you at commissioning, according to your house.\u003c\/p\u003e\u003ch3\u003eCooling and humidity\u003c\/h3\u003e\u003cp\u003eIn summer, a reversing valve flips the cycle and rejects the heat of the house outdoors. The cold coil also removes humidity, and the condensed water flows through a drain to a floor drain or a pump. On days when the reduced level is enough, cycles are longer, which helps keep the air dry; during a heat wave, full capacity takes over. We also check the return air, without which a closed bedroom stays warmer than the rest of the house.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003egrant for efficient heat pumps\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003ch3\u003eThe visit\u003c\/h3\u003e\u003cp\u003eWe note the furnace model and check its condition, the airflow of its blower and the duct sizes before the quote. We measure the air outlet and the clearance above the furnace: the 14.5 in. coil must line up with it, or we plan a sealed transition. Finally, we look at the electrical panel, which will have to carry both the heat pump and the furnace's elements, and the possible location of the outdoor unit.\u003c\/p\u003e\u003cp\u003eThe ducts deserve the same attention. Air conditioning and a heat pump generally require more airflow than the furnace does in heating, and the return air is often what limits the system. We count the returns, check their size and note the ducts that run through an unheated space: those must be insulated so they do not become covered with condensation in summer.\u003c\/p\u003e\u003ch3\u003eThe work\u003c\/h3\u003e\u003cp\u003eThe coil is set on the furnace's air outlet and connected to the plenum, with its condensate drain to a floor drain or a pump. The outdoor unit goes on a bracket or a pad, above the snow line, away from roof drips and dryer vents, where defrost water does not freeze on a walkway. The insulated copper line is brazed, pressure tested and put under vacuum before the valves are opened. The outdoor unit gets a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e and a disconnect, and the control wiring connects the thermostat, the furnace and the outdoor unit.\u003c\/p\u003e\u003ch3\u003eCommissioning\u003c\/h3\u003e\u003cp\u003eWe check the refrigerant charge and the airflow at each of the two stages, in heating as in cooling, then defrost and the complete sequence up to the furnace's electric elements coming in. The furnace blower settings are adjusted to match the confirmed combination. We finish by explaining the thermostat: whether the heat pump is heating alone or with electric auxiliary heat, at which level, and how to change the setpoint.\u003c\/p\u003e\u003ch3\u003eMaintenance and warranty\u003c\/h3\u003e\u003cp\u003eThe furnace filter now works all year: check it every month and replace it according to its format. Keep the outdoor unit clear of snow and leaves. Plan annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the coil, the condensate drain and the electrical connections, in addition to a check of the electric furnace and its elements. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE H4H7T ION 2 stages | 2 Tons - 24,000 BTU (Coil EVD4X 14.5 in.) - R410A. We note your electric furnace model and confirm the system ratings, the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67798091039012,"sku":"H4H7T24AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_H4H7T_2_TONNES_24000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082528"},{"product_id":"thermopompe-centrale-add-on-arcoaire-n4h5s-performance-2-5-tonnes-30000-btu-serpentin-evd4x-17-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 2.5 Tons - 30,000 BTU (Coil EVD4X 17.5 in.) - R410A","description":"\u003ch2\u003eTwo and a half tons of cooling and heating on a family-sized furnace\u003c\/h2\u003e\u003cp\u003eIn a family home heated by a forced-air \u003cstrong\u003eelectric furnace\u003c\/strong\u003e, the \u003cstrong\u003educt\u003c\/strong\u003e network already serves every room, from the basement to the bedrooms. The \u003cstrong\u003eADD-ON\u003c\/strong\u003e system builds on that network: a \u003cstrong\u003ecoil\u003c\/strong\u003e is installed on the existing furnace and an outdoor unit heats and cools through the same ducts. The furnace stays in place and is only used as backup, through its electric elements.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 2.5 Tons - 30,000 BTU (Coil EVD4X 17.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eN4H5S30AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X30M17A\u003c\/strong\u003e coil. At this size, the coil moves up to 17.5 in.: a detail that matters when it is set on the furnace, and one we check from the first visit.\u003c\/p\u003e\u003ch3\u003eThe 17.5 in. coil\u003c\/h3\u003e\u003cp\u003eThe smaller sizes in this family use a narrower coil; this one moves up to 17.5 in. to accommodate the heat exchange surface of a 2.5-ton system. Furnaces serving larger homes often have a wider cabinet, and the coil then lines up with it directly. When the furnace is narrower or wider, we fabricate a sealed transition so that all the air passes through the coil, with no leakage at the sides.\u003c\/p\u003e\u003cp\u003eWe also measure the height available between the top of the furnace and the joists. A finished basement, with a finished ceiling around the mechanical room, can limit the space for the coil and the rebuilt plenum; better to know this before the quote than on the day of the work.\u003c\/p\u003e\u003ch3\u003eWhich homes this size suits\u003c\/h3\u003e\u003cp\u003eThe 2.5-ton size is aimed at roomier homes: a bungalow with a finished basement, a family-sized cottage, a split-level house or a generous semi-detached house, as found in \u003cstrong\u003eLaval\u003c\/strong\u003e, on the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e or on the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e. With an ADD-ON system, the heat pump is sized first on cooling needs, since the furnace's elements cover the deep cold.\u003c\/p\u003e\u003cp\u003eFloor area is not enough to choose. A well-insulated house with recent windows may be fine with the next size down; a house with lots of glass or a poorly insulated attic may need more. The room-by-room load calculation confirms the size. An oversized unit would run in short cycles, leave humidity in the air and create differences between rooms.\u003c\/p\u003e\u003ch3\u003eWhat the furnace must be able to do\u003c\/h3\u003e\u003cp\u003eIn an ADD-ON system, the furnace blower is what pushes the air through the coil. A 2.5-ton coil requires an airflow that not every furnace can deliver, especially the smaller ones. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. We also count the return air openings: a family home built for a furnace alone sometimes has too few for cooling, and that is often what limits the system.\u003c\/p\u003e\u003ch3\u003eHow the system works\u003c\/h3\u003e\u003cp\u003eA heat pump moves heat instead of producing it. In winter, its refrigerant, \u003cstrong\u003eR-410A\u003c\/strong\u003e, captures heat from the outdoor air; the compressor concentrates it and sends it to the coil, which the furnace blower sweeps before pushing the air into the ducts. In summer, a reversing valve flips the cycle and the heat of the house is rejected outdoors. The electric furnace itself changes nothing in how it works: its elements wait for the thermostat to call them.\u003c\/p\u003e\u003ch3\u003eWinter, with the furnace's electric auxiliary heat\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003ethermostat\u003c\/strong\u003e decides when the heat pump heats alone and when the furnace's \u003cstrong\u003eelectric elements\u003c\/strong\u003e come in as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e. In fall, in spring and through a good part of winter, the heat pump is enough. When the cold becomes too sharp for it, the elements top up the heat. This pairing does not carry the cold-climate designation; in an ADD-ON system, the furnace's elements are precisely what covers the coldest nights.\u003c\/p\u003e\u003cp\u003eIn an electrically heated family home, those elements are among the largest loads of the winter: the longer the heat pump heats alone, the less they run. During defrost, they may heat for a few minutes so that the air from the grilles stays warm. The moment auxiliary heat comes in is set according to your house, its insulation and your comfort.\u003c\/p\u003e\u003ch3\u003eSummer in a family home\u003c\/h3\u003e\u003cp\u003eA family home builds up heat from several sources in summer: sun on the large windows, the kitchen, electronic devices. The heat pump cools every room served by the ducts, and the coil removes humidity from the air; the condensed water flows through a drain to a floor drain or a pump.\u003c\/p\u003e\u003cp\u003eA finished basement needs little cooling but benefits from the drier air. The dampers on the grilles let you reduce the airflow there and send more to the bedrooms; we do this initial balancing at commissioning, avoiding fully closing too many grilles, which would starve the coil of the air it needs.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eN4H5S30AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X30M17A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility. This page therefore publishes no rating figure.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003egrant for efficient heat pumps\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eThe installation, from the basement to the yard\u003c\/h2\u003e\u003ch3\u003eIn the basement\u003c\/h3\u003e\u003cp\u003eThe 17.5 in. coil is set on the furnace's air outlet and connected to the supply plenum. Its condensate drain is routed to a floor drain or a pump, with a steady slope. If a humidifier is mounted on the plenum, its location is reviewed, since the coil takes that spot. We also replace the thermostat: a thermostat made for an electric furnace alone cannot control a heat pump and its auxiliary heat, and we add, where needed, the wiring missing to the outdoor unit.\u003c\/p\u003e\u003ch3\u003eIn the yard\u003c\/h3\u003e\u003cp\u003eThe outdoor unit is installed on a bracket or a pad, above the snow line, away from roof drips, dryer vents and bedroom windows. Defrost water must drain without freezing on a driveway or a walkway, and the unit must remain accessible for maintenance. The insulated copper line runs to the coil; it is brazed, pressure tested and put under vacuum before the valves are opened. The unit gets a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e and a nearby disconnect; we check that the panel can carry the heat pump in addition to the furnace's elements.\u003c\/p\u003e\u003cp\u003eAt commissioning, we check the refrigerant charge, airflow, defrost and the furnace's electric elements coming in, then we explain the thermostat to you.\u003c\/p\u003e\u003ch3\u003eMaintenance and warranty\u003c\/h3\u003e\u003cp\u003eThe furnace filter now works all year: check it every month and replace it according to its format. Keep the outdoor unit clear of snow and leaves, without covering it in winter. Plan annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the coil, the condensate drain and the electrical connections, in addition to a check of the electric furnace and its elements. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 2.5 Tons - 30,000 BTU (Coil EVD4X 17.5 in.) - R410A. We assess the home room by room, measure the space for the coil and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67798098870564,"sku":"N4H5S30AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_N4H5S_2_5_TONNES_30000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082539"},{"product_id":"thermopompe-centrale-add-on-arcoaire-r4h5s-economique-2-5-tonnes-30000-btu-serpentin-evd4x-17-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 2.5 Tons - 30,000 BTU (Coil EVD4X 17.5 in.) - R410A","description":"\u003ch2\u003eAdd a heat pump to a home heated by an electric furnace, starting with the panel\u003c\/h2\u003e\u003cp\u003eIn a house heated by an \u003cstrong\u003eelectric furnace\u003c\/strong\u003e, the panel already carries all of the heating. The \u003cstrong\u003eADD-ON\u003c\/strong\u003e system hands a good share of it to the heat pump: a \u003cstrong\u003ecoil\u003c\/strong\u003e is installed on the existing furnace and an outdoor unit heats and cools through the same \u003cstrong\u003educts\u003c\/strong\u003e. The furnace stays in place and is only used as backup: its electric elements cover the cold the heat pump does not cover alone.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 2.5 Tons - 30,000 BTU (Coil EVD4X 17.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eR4H5S30AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X30M17A\u003c\/strong\u003e coil. The R4H5S series is the entry level of this Arcoaire family. Before talking about the unit, we look at something often forgotten in an electrically heated house: the electrical panel.\u003c\/p\u003e\u003ch3\u003eWhy start with the electrical panel\u003c\/h3\u003e\u003cp\u003eIn a house heated by an electric furnace, the panel already feeds the furnace's elements, often the largest load in the house, on top of the range, the water heater and the dryer. Sometimes it is enough to add a heat pump; sometimes it is already full, or its capacity is taken up by a spa or a charging station. The outdoor unit of a 2.5-ton system requires a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e and a nearby disconnect, and it comes on top of the furnace's elements, which stay connected for backup: that needs planning.\u003c\/p\u003e\u003cp\u003eDuring the visit, we open the panel, note the free space and the existing loads, and check the cable route to the outdoor unit. If the panel requires work, we state it clearly in the quote. That way, you know before signing everything the project includes.\u003c\/p\u003e\u003ch3\u003eWhat the ADD-ON system adds\u003c\/h3\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, in the supply plenum. A copper line connects it to the outdoor unit. The furnace blower pushes the house air through the coil, then into the existing ducts: no new grilles, no unit on the wall. The furnace's heating elements and their power supply are not touched: they stay in place for backup.\u003c\/p\u003e\u003ch3\u003eWhich homes this size suits\u003c\/h3\u003e\u003cp\u003eThe 2.5-ton size is aimed at roomier homes: a split-level house, a bungalow with a finished basement, a family-sized cottage or a generous semi-detached house. With an ADD-ON system, the heat pump is sized first on cooling needs, since the furnace's elements cover the deep cold. A unit larger than needed would cool in fits and starts and leave humidity in the air.\u003c\/p\u003e\u003cp\u003eA split-level house has its own challenges: the offset levels do not all receive air the same way, and the room above the garage is often the hardest to cool. The room-by-room load calculation accounts for insulation, windows and orientation, and it is what confirms the size.\u003c\/p\u003e\u003ch3\u003eHow the heat pump heats and cools\u003c\/h3\u003e\u003cp\u003eA heat pump does not produce heat: it moves it. In winter, its refrigerant, \u003cstrong\u003eR-410A\u003c\/strong\u003e, captures heat from the outdoor air; the compressor concentrates it and sends it to the coil. In summer, a reversing valve flips the cycle, and the heat of the house is rejected outdoors. The air coming out of the grilles when the heat pump is heating is milder than that of the furnace's elements, and the cycles are longer: that is normal heat pump operation.\u003c\/p\u003e\u003ch3\u003eBackup from the furnace's elements\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003ethermostat\u003c\/strong\u003e decides when the heat pump heats alone and when the furnace's \u003cstrong\u003eelectric elements\u003c\/strong\u003e come in as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e. Every hour the heat pump is enough is an hour those elements stay off. The moment auxiliary heat comes in takes two things into account: the cold at which the heat pump is no longer enough for your house, and the comfort you expect when the outdoor temperature drops quickly.\u003c\/p\u003e\u003cp\u003eThis pairing does not carry the cold-climate designation; in an ADD-ON system, the furnace's elements are precisely what covers the coldest nights. During defrost, they may also heat for a few minutes so that the air from the grilles stays warm. We set the parameters with you at commissioning.\u003c\/p\u003e\u003ch3\u003eCooling and humidity\u003c\/h3\u003e\u003cp\u003eIn cooling mode, the cold coil removes heat and humidity from the air. The condensed water flows through a drain to a floor drain or a pump; if a humidifier already empties into the same drain, we arrange the two drains so that both flow without backing up. A right-sized unit runs long enough on each cycle to dry the air, which makes the house more comfortable at the same temperature.\u003c\/p\u003e\u003cp\u003eWe also check the return air. A closed bedroom without a return stays warmer than the rest of the house, and a home designed for a furnace alone sometimes has too few returns for cooling.\u003c\/p\u003e\u003ch3\u003eThe 17.5 in. coil on the furnace\u003c\/h3\u003e\u003cp\u003eWe check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The blower must be able to move the airflow of a 2.5-ton coil. The 17.5 in. coil must line up with the furnace's air outlet; if it does not, we fabricate a sealed transition. We also measure the clearance above the furnace and identify any humidifier mounted on the plenum, whose location will need to be reviewed.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eR4H5S30AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X30M17A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility. No rating figure is therefore published here.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003egrant for efficient heat pumps\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eThe job\u003c\/h2\u003e\u003ch3\u003eThe steps\u003c\/h3\u003e\u003col\u003e\u003cli\u003e\u003cstrong\u003eVisit and load calculation\u003c\/strong\u003e: rooms, insulation, windows, furnace, ducts, return air and electrical panel.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eCoil\u003c\/strong\u003e: set on the furnace's air outlet, connected to the plenum, with its condensate drain.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eOutdoor unit\u003c\/strong\u003e: on a bracket or a pad, above the snow line, away from roof drips, dryer vents and bedroom windows.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eRefrigerant line\u003c\/strong\u003e: insulated copper, brazing, pressure test and vacuum before the valves are opened.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eElectrical\u003c\/strong\u003e: dedicated circuit, outdoor disconnect and control wiring, on a panel checked to carry the heat pump in addition to the furnace's elements.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eThermostat\u003c\/strong\u003e: replaced with a model that manages the heat pump and electric auxiliary heat, since a furnace-only thermostat cannot control a heat pump.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eCommissioning\u003c\/strong\u003e: refrigerant charge, airflow, defrost, the furnace's elements coming in and an explanation of the thermostat.\u003c\/li\u003e\u003c\/ol\u003e\u003ch3\u003eMaintenance and warranty\u003c\/h3\u003e\u003cp\u003eThe furnace filter now works all year: check it every month and replace it according to its format. Keep the outdoor unit clear of snow and leaves, with no cover in winter since it heats. Plan annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the coil, the condensate drain and the electrical connections; the electric furnace and its elements also deserve a check. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003eThe electrical licence makes full sense in an electrically heated home: checking the panel and connecting the outdoor unit are part of the same job as the refrigeration circuit and the connection to the ducts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 2.5 Tons - 30,000 BTU (Coil EVD4X 17.5 in.) - R410A. We assess the home room by room, check your electrical panel and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67798480453924,"sku":"R4H5S30AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_R4H5S_2_5_TONNES_30000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082540"},{"product_id":"thermopompe-centrale-add-on-arcoaire-hsh6-haut-de-gamme-2-5-tonnes-30000-btu-serpentin-evd4x-17-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE HSH6 Premium | 2.5 Tons - 30,000 BTU (Coil EVD4X 17.5 in.) - R410A","description":"\u003ch2\u003eDucts that measure up to a two-and-a-half-ton heat pump\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eADD-ON\u003c\/strong\u003e system adds a heat pump to an existing \u003cstrong\u003eelectric furnace\u003c\/strong\u003e: a \u003cstrong\u003ecoil\u003c\/strong\u003e is installed on the furnace and the outdoor unit heats and cools through the same \u003cstrong\u003educts\u003c\/strong\u003e. The furnace is only used as backup, through its electric elements. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE HSH6 Premium | 2.5 Tons - 30,000 BTU (Coil EVD4X 17.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eHSH630GKA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X30M17A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eThe HSH6 series is presented as the premium tier of this Arcoaire family. But in a central system, the equipment does only half the work: the other half happens in the ducts. A 2.5-ton heat pump connected to a network that is too narrow or poorly sealed will never deliver the expected comfort. That is why this page talks as much about the ducts as about the unit.\u003c\/p\u003e\u003ch3\u003eWhy the ducts decide the result\u003c\/h3\u003e\u003cp\u003eThe ducts of a house heated by an electric furnace alone were sized for warm air. Yet air conditioning and a heat pump generally require more airflow than the furnace does in heating. If the network cannot carry that airflow, the blower strains, the grilles whistle, the coil can freeze in summer, and the rooms far from the furnace fall behind.\u003c\/p\u003e\u003cp\u003eWe check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. For a 2.5-ton system, we look in particular at the cross-section of the main ducts, the number of supplies per room and, above all, the return air.\u003c\/p\u003e\u003ch3\u003eReturn air and grilles\u003c\/h3\u003e\u003cp\u003eReturn air is often the weak link in a house built for a furnace. A single return in the basement, or a return grille that is too small, limits the whole system: the blower cannot push more air than it receives. In cooling, a closed bedroom without a return becomes the warmest room in the house. Depending on the layout, an additional return, a larger grille or a transfer grille solves it.\u003c\/p\u003e\u003cp\u003eOn the supply side, each room must receive airflow in proportion to its needs. Large rooms with lots of glass and bedrooms under the roof need more; the basement, much less. The dampers in the ducts and grilles allow this balancing, which we do at commissioning. We avoid, however, fully closing too many grilles, which would starve the coil of the air it needs.\u003c\/p\u003e\u003ch3\u003eSealing and insulating the ducts\u003c\/h3\u003e\u003cp\u003eA duct that leaks in the basement loses little, since the air stays in the house. A duct that leaks in a garage, a crawl space or an attic, on the other hand, loses warm air in winter and cool air in summer. These sections must be sealed and insulated: in summer, a cold duct running through a warm space becomes covered with condensation and can stain a ceiling. We locate these sections during the visit and state in the quote the work they require.\u003c\/p\u003e\u003ch3\u003eWhich homes this size suits\u003c\/h3\u003e\u003cp\u003eThe 2.5-ton size is aimed at roomier homes: a bungalow with a finished basement, a family-sized cottage, a split-level house or a generous semi-detached house. With an ADD-ON system, the heat pump is sized first on cooling, since the furnace's elements cover the deep cold. The room-by-room load calculation takes into account insulation, windows and orientation; it is what confirms the size, and it is also what indicates the airflow each room must receive.\u003c\/p\u003e\u003ch3\u003eThe system in brief\u003c\/h3\u003e\u003cp\u003eThe 17.5 in. coil is set on the furnace's air outlet; if it does not line up with it, we fabricate a sealed transition. A heat pump moves heat instead of producing it: in winter, its refrigerant, \u003cstrong\u003eR-410A\u003c\/strong\u003e, captures heat from the outdoor air and delivers it to the coil; in summer, a reversing valve flips the cycle and rejects the heat of the house outdoors. In both cases, the furnace blower is what pushes the air into the ducts.\u003c\/p\u003e\u003ch3\u003eHeating, with electric auxiliary heat\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003ethermostat\u003c\/strong\u003e decides when the heat pump heats alone and when the furnace's \u003cstrong\u003eelectric elements\u003c\/strong\u003e come in as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e. In fall, in spring and through a good part of winter, the heat pump is enough and the elements stay off; when the cold becomes too sharp, they top up the heat. This pairing does not carry the cold-climate designation, and the furnace's elements are what covers the coldest nights. During defrost, they may also heat for a few minutes so that the air from the grilles stays warm.\u003c\/p\u003e\u003cp\u003eThe air the heat pump delivers is milder than that of the furnace's elements, and the cycles are longer. Tight, well-balanced ducts make all the difference here: the heat reaches every room without a cold draft near the windows.\u003c\/p\u003e\u003ch3\u003eCooling and humidity\u003c\/h3\u003e\u003cp\u003eIn cooling mode, the cold coil removes heat and humidity from the air; the condensed water flows through a drain to a floor drain or a pump. Properly set airflow matters here too: too low, it makes the coil freeze; too high, it removes less humidity. Properly sized, the system runs long enough on each cycle to keep the air dry, from the main floor up to the bedrooms.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eHSH630GKA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X30M17A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility. This page therefore publishes no rating figure.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003egrant for efficient heat pumps\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eInstallation by AirGreen\u003c\/h2\u003e\u003ch3\u003eFrom the visit to commissioning\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eVisit\u003c\/strong\u003e: load calculation, inspection of the ducts, the return air and the furnace, measurement of the space for the coil and check of the electrical panel, which must carry the heat pump in addition to the furnace.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eDucts\u003c\/strong\u003e: returns, grilles, sealing or insulation as the quote provides.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eCoil\u003c\/strong\u003e: set on the furnace's air outlet, connected to the plenum, with its condensate drain to a floor drain or a pump.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eOutdoor unit\u003c\/strong\u003e: on a bracket or a pad, above the snow line, away from roof drips and dryer vents.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eRefrigerant line and electrical\u003c\/strong\u003e: insulated copper, brazing, pressure test, vacuum, \u003cstrong\u003ededicated circuit\u003c\/strong\u003e and disconnect.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eThermostat and commissioning\u003c\/strong\u003e: thermostat that manages the heat pump and electric auxiliary heat, refrigerant charge, airflow, defrost, the furnace's elements coming in and balancing of the dampers.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eMaintenance and warranty\u003c\/h3\u003e\u003cp\u003eThe furnace filter now works all year, and a clogged filter reduces airflow as much as a duct that is too narrow: check it every month and replace it according to its format. Keep the outdoor unit clear of snow and leaves, and the grilles free of furniture and rugs. Plan annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the coil, the condensate drain and the electrical connections, in addition to a check of the electric furnace and its elements. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE HSH6 Premium | 2.5 Tons - 30,000 BTU (Coil EVD4X 17.5 in.) - R410A. We assess the home room by room, inspect your ducts and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67798486155556,"sku":"HSH630GKA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_HSH6_2_5_TONNES_30000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082539"},{"product_id":"thermopompe-centrale-add-on-arcoaire-h4h5s-ion-2-5-tonnes-30000-btu-serpentin-evd4x-17-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE H4H5S ION | 2.5 Tons - 30,000 BTU (Coil EVD4X 17.5 in.) - R410A","description":"\u003ch2\u003eAn electric furnace that keeps its elements for the deep cold\u003c\/h2\u003e\u003cp\u003eMany homes in Greater \u003cstrong\u003eMontreal\u003c\/strong\u003e are heated by an \u003cstrong\u003eelectric furnace\u003c\/strong\u003e: heating elements in a cabinet, a blower and a network of \u003cstrong\u003educts\u003c\/strong\u003e. The \u003cstrong\u003eADD-ON\u003c\/strong\u003e system connects to it without removing anything: a \u003cstrong\u003ecoil\u003c\/strong\u003e is installed on the furnace and an outdoor unit heats and cools through the same ducts. The furnace is only used as backup, and its elements only come on when the heat pump is no longer enough.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE H4H5S ION | 2.5 Tons - 30,000 BTU (Coil EVD4X 17.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eH4H5S30AKAAA\u003c\/strong\u003e outdoor unit, from the ION series, with the \u003cstrong\u003eEVD4X30M17A\u003c\/strong\u003e coil. In a home heated by an electric furnace, the heat pump changes the very way electricity becomes heat.\u003c\/p\u003e\u003ch3\u003eTwo ways to heat with electricity\u003c\/h3\u003e\u003cp\u003eA heating element turns electricity into heat, no more and no less: what it consumes, it gives back. A heat pump works differently. It uses electricity to run a compressor, which captures the heat already present in the outdoor air and carries it inside. In mild weather, it thus delivers more heat than it consumes in electricity, which no element can do.\u003c\/p\u003e\u003cp\u003eThe colder it gets, the less heat there is to capture outside, and the more the house loses. That is where the furnace's elements take back their role. This pairing does not carry the cold-climate designation: in an ADD-ON system, the electric furnace covers the coldest nights.\u003c\/p\u003e\u003ch3\u003eThe heat pump cycle\u003c\/h3\u003e\u003cp\u003eIn winter, the refrigerant, \u003cstrong\u003eR-410A\u003c\/strong\u003e, evaporates in the outdoor unit as it captures heat from the air, then the compressor compresses it and sends it to the coil sitting on the furnace. The furnace blower passes the house air through that coil, which gives up its heat to it, then pushes it into the ducts. In summer, a reversing valve flips the cycle: the coil turns cold, removes heat and humidity from the air, and the outdoor unit rejects that heat outdoors.\u003c\/p\u003e\u003ch3\u003eElements as backup\u003c\/h3\u003e\u003cp\u003eA compatible \u003cstrong\u003ethermostat\u003c\/strong\u003e decides when the heat pump heats alone and when the furnace's elements take over. In fall, in spring and through a good part of winter, the heat pump is enough. When it can no longer hold the setpoint, the thermostat calls on the elements. During defrost, they may also heat for a few minutes so that the air from the grilles stays warm.\u003c\/p\u003e\u003cp\u003eWith an electric furnace, the rule is simple: the heat pump keeps control as long as it is enough for the house, since every hour it heats alone is an hour the elements stay off. The setting is therefore made mainly for comfort. We set it with you at commissioning and show you how to read the thermostat screen, so you always know which appliance is heating.\u003c\/p\u003e\u003cp\u003eYou will notice a difference to the touch: when the heat pump is heating, the air coming out of the grilles is milder than the elements' air, and the system runs in longer cycles. The house is no less warm for it; the heat arrives more gently and more continuously. If the air feels cool near a grille, the airflow or location of that grille often deserves a second look, and we check it at commissioning.\u003c\/p\u003e\u003ch3\u003eWhich homes this size suits\u003c\/h3\u003e\u003cp\u003eThe 2.5-ton size is aimed at roomier homes: a bungalow with a finished basement, a family-sized cottage, a split-level house or a generous semi-detached house. With an ADD-ON system, the heat pump is sized first on cooling, since the furnace covers the deep cold. A unit larger than needed would cool in fits and starts and remove humidity poorly.\u003c\/p\u003e\u003cp\u003eAt equal size, a well-insulated house and a house that loses a lot of heat do not have the same needs. The room-by-room load calculation takes into account the walls, the attic, the windows and the orientation; it confirms the size before the quote.\u003c\/p\u003e\u003ch3\u003eThe electric furnace as a base\u003c\/h3\u003e\u003cp\u003eWe check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. An electric furnace in good condition makes an excellent base: its cabinet, its elements and its blower stay in place, and that blower now serves both heating modes and cooling. That blower must, however, be able to move the airflow of a 2.5-ton coil, and its settings must be adapted to the new system. If the furnace shows signs of advanced wear, we tell you before you sign.\u003c\/p\u003e\u003ch3\u003eThe electrical panel\u003c\/h3\u003e\u003cp\u003eIn an all-electric home, the panel already carries the furnace, the water heater, the range and the rest. The outdoor unit requires one more \u003cstrong\u003ededicated circuit\u003c\/strong\u003e, with a nearby disconnect. During the visit, we check the panel's free space and capacity. If work is needed, it appears in the quote, so that nothing surprises you on installation day.\u003c\/p\u003e\u003ch3\u003eCooling and humidity\u003c\/h3\u003e\u003cp\u003eIn summer, the heat pump cools every room served by the ducts. The water the coil removes from the air flows through a drain to a floor drain or a pump. A right-sized unit runs long enough on each cycle to dry the air well. We also check the return air: a closed bedroom without a return stays warmer than the rest of the house.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eH4H5S30AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X30M17A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility. This page therefore publishes no rating figure.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003egrant for efficient heat pumps\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eInstallation on the electric furnace\u003c\/h2\u003e\u003ch3\u003eThe 17.5 in. coil and the work\u003c\/h3\u003e\u003cp\u003eThe 17.5 in. coil is set on the furnace's air outlet and connected to the supply plenum; if it does not line up with the furnace, we fabricate a sealed transition. Its condensate drain is routed to a floor drain or a pump. The outdoor unit is installed on a bracket or a pad, above the snow line, away from roof drips and dryer vents, where defrost water will not freeze on a walkway.\u003c\/p\u003e\u003cp\u003eThe insulated copper line is brazed, pressure tested and put under vacuum before the valves are opened. The thermostat is replaced and wired to the furnace and the outdoor unit. At commissioning, we check the refrigerant charge, airflow, defrost and the switch from the heat pump to the elements.\u003c\/p\u003e\u003ch3\u003eMaintenance and warranty\u003c\/h3\u003e\u003cp\u003eThe furnace filter now works all year: check it every month and replace it according to its format. Keep the outdoor unit clear of snow and leaves, without covering it in winter since it heats. Plan annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the coil, the condensate drain, the electrical connections and the furnace. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE H4H5S ION | 2.5 Tons - 30,000 BTU (Coil EVD4X 17.5 in.) - R410A. We assess the home room by room, check your furnace and your electrical panel, and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67798493987108,"sku":"H4H5S30AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_H4H5S_2_5_TONNES_30000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082528"},{"product_id":"thermopompe-centrale-add-on-arcoaire-n4h5s-performance-3-tonnes-36000-btu-serpentin-evd4x-17-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 3 Tons - 36,000 BTU (Coil EVD4X 17.5 in.) - R410A","description":"\u003ch2\u003eThree tons to cool a large home and take on most of its heating\u003c\/h2\u003e\u003cp\u003eIn a large house heated by a forced-air \u003cstrong\u003eelectric furnace\u003c\/strong\u003e, the \u003cstrong\u003educt\u003c\/strong\u003e network serves several living areas, bedrooms and often a finished basement. The \u003cstrong\u003eADD-ON\u003c\/strong\u003e system builds on that network: a \u003cstrong\u003ecoil\u003c\/strong\u003e is installed on the existing furnace and an outdoor unit heats and cools the whole house through the same ducts. The furnace stays in place and is only used as backup, through its electric elements.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 3 Tons - 36,000 BTU (Coil EVD4X 17.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eN4H5S36AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X36M17A\u003c\/strong\u003e coil. At this size, success depends less on the equipment than on the way air reaches each room.\u003c\/p\u003e\u003ch3\u003eWhich homes this size suits\u003c\/h3\u003e\u003cp\u003eThe 3-ton size is aimed at roomy homes: a spacious cottage, a bungalow with a large finished basement, an open-plan house with lots of windows, as seen in the newer neighbourhoods of \u003cstrong\u003eLaval\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e or the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e. With an ADD-ON system, the heat pump is sized first on cooling needs, since the furnace's elements cover the deep cold.\u003c\/p\u003e\u003cp\u003eIt is also a size that is easy to choose too large. A recent, well-insulated house, even a large one, is often fine with the next size down. An oversized unit reaches the setpoint too fast, runs in short cycles and leaves humidity in the air. The room-by-room load calculation takes into account the insulation, windows, orientation and airtightness of the house; it is what confirms whether 3 tons is the right choice.\u003c\/p\u003e\u003ch3\u003eA large open area, a single duct network\u003c\/h3\u003e\u003cp\u003eAn open area brings together the kitchen, the dining room and the living room, often in front of large windows. In summer, it is the zone that builds up the most heat: sun, cooking, appliances. The supply grilles there must be numerous enough and well placed to cover the whole space, not just one corner. We look at their position relative to the windows and the island, and we check that the return air lets warm air come back to the furnace.\u003c\/p\u003e\u003ch3\u003eAir distribution in a large home\u003c\/h3\u003e\u003cp\u003eIn a large house, the rooms farthest from the furnace are the first to suffer from a poorly suited network: the bedroom at the end of the hallway, the room above the garage, the basement office. Air conditioning and a heat pump generally require more airflow than the furnace does in heating, and a main duct that is too narrow or too few returns limit the whole system.\u003c\/p\u003e\u003cp\u003eWe check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. We count the supplies and returns room by room, and we state in the quote the adjustments needed: an additional return, a larger grille, a duct to insulate if it runs through an unheated space. At commissioning, we balance the dampers so that each room gets its share.\u003c\/p\u003e\u003ch3\u003eWhat the furnace must provide\u003c\/h3\u003e\u003cp\u003eIn an ADD-ON system, the furnace blower is what pushes the air through the coil. A 3-ton coil requires substantial airflow, and a furnace sized primarily for heating cannot always provide it. It is one of the first things we confirm.\u003c\/p\u003e\u003cp\u003eThe 17.5 in. coil is set on the furnace's air outlet; if it does not line up with it, we fabricate a sealed transition. We also measure the clearance above the furnace, often limited in a finished basement, and identify any humidifier mounted on the plenum, whose location will need to be reviewed.\u003c\/p\u003e\u003ch3\u003eHow the heat pump works\u003c\/h3\u003e\u003cp\u003eA heat pump moves heat instead of producing it. In winter, its refrigerant, \u003cstrong\u003eR-410A\u003c\/strong\u003e, captures heat from the outdoor air; the compressor concentrates it and sends it to the coil, which the furnace blower sweeps before pushing the air into the ducts. In summer, a reversing valve flips the cycle and rejects the heat of the house outdoors.\u003c\/p\u003e\u003ch3\u003eWinter, with the furnace's elements taking over\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003ethermostat\u003c\/strong\u003e decides when the heat pump heats alone and when the furnace's \u003cstrong\u003eelectric elements\u003c\/strong\u003e come in as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e. In fall, in spring and through a good part of winter, the heat pump heats alone. When the cold becomes too sharp for it, the elements top up the heat. This pairing does not carry the cold-climate designation; in an ADD-ON system, the furnace's elements are precisely what covers the coldest nights.\u003c\/p\u003e\u003cp\u003eIn a large electrically heated house, those elements represent a significant load all winter. With the heat pump, they stay off as long as it is enough, and during defrost they may heat for a few minutes so that the air from the grilles stays warm. The moment auxiliary heat comes in is set according to your house, its heat loss and your comfort.\u003c\/p\u003e\u003ch3\u003eSummer: heat and humidity\u003c\/h3\u003e\u003cp\u003eIn cooling mode, the cold coil removes heat and humidity from the air; the condensed water flows through a drain to a floor drain or a pump. In a large house, a right-sized unit runs long enough on each cycle to dry the air in every room, not just near the thermostat. A large finished basement benefits especially from this drier air.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eN4H5S36AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X36M17A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility. This page therefore publishes no rating figure.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003egrant for efficient heat pumps\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eInstallation in a large home\u003c\/h2\u003e\u003ch3\u003eOutdoor unit, refrigerant line and electrical\u003c\/h3\u003e\u003cp\u003eThe outdoor unit is installed on a bracket or a pad, above the snow line, away from roof drips, dryer vents and bedroom windows. In a large house, the mechanical room is sometimes far from the most practical exterior wall; we choose the location that keeps the copper line as short and direct as possible, while letting defrost water drain without freezing on a walkway. The insulated line is brazed, pressure tested and put under vacuum before the valves are opened.\u003c\/p\u003e\u003cp\u003eThe unit gets a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e and a nearby disconnect; we check the panel's space and capacity during the visit, since it must carry the heat pump in addition to the furnace's elements. The thermostat is replaced with a model that manages the heat pump and electric auxiliary heat, wired to the furnace and the outdoor unit. At commissioning, we check the refrigerant charge, airflow, defrost and the furnace's elements coming in, then we balance the dampers.\u003c\/p\u003e\u003ch3\u003eMaintenance and warranty\u003c\/h3\u003e\u003cp\u003eThe furnace filter now works all year; with a system this size, a clogged filter is quickly felt in the far rooms. Check it every month and replace it according to its format. Keep the outdoor unit clear of snow and leaves. Plan annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the coil, the condensate drain and the electrical connections, in addition to a check of the electric furnace and its elements. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 3 Tons - 36,000 BTU (Coil EVD4X 17.5 in.) - R410A. We assess the home room by room, check the air distribution and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67798499492132,"sku":"N4H5S36AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_N4H5S_3_TONNES_36000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082539"},{"product_id":"thermopompe-centrale-add-on-arcoaire-r4h5s-economique-3-tonnes-36000-btu-serpentin-evd4x-17-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 3 Tons - 36,000 BTU (Coil EVD4X 17.5 in.) - R410A","description":"\u003ch2\u003eThree tons of cooling and heating, on an electric furnace that stays in service\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eADD-ON\u003c\/strong\u003e system adds a heat pump to an existing \u003cstrong\u003eelectric furnace\u003c\/strong\u003e: a \u003cstrong\u003ecoil\u003c\/strong\u003e is installed on the furnace and the outdoor unit heats and cools through the same \u003cstrong\u003educts\u003c\/strong\u003e. The furnace is only used as backup, through its electric elements. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 3 Tons - 36,000 BTU (Coil EVD4X 17.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eR4H5S36AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X36M17A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eThe R4H5S series is the entry level of this Arcoaire family. At 3 tons, it is aimed at roomy homes, and the outdoor unit becomes a visible part of the property: where it goes, how it gets through winter and how it is connected matter as much as the equipment itself. This page takes the time to cover them.\u003c\/p\u003e\u003ch3\u003eWhat the system includes\u003c\/h3\u003e\u003cp\u003eInside, the coil sits on the furnace's air outlet and the furnace blower pushes the air through it, then into the existing ducts. Outside, the unit contains the compressor and the heat exchanger that capture or reject heat. An insulated copper line connects the two, and the circuit runs on \u003cstrong\u003eR-410A\u003c\/strong\u003e. A compatible thermostat coordinates the heat pump and the furnace's elements. Those elements and their power supply are not touched: they stay in place for backup.\u003c\/p\u003e\u003ch3\u003eWhich homes this size suits\u003c\/h3\u003e\u003cp\u003eThe 3-ton size is aimed at roomy homes: a large cottage, a bungalow with a large finished basement, an open-plan house with plenty of windows. With an ADD-ON system, the heat pump is sized first on cooling needs, since the furnace's elements cover the deep cold. A well-insulated house, even a large one, is sometimes fine with the next size down; an oversized unit would run in short cycles and leave humidity in the air. The room-by-room load calculation confirms the size.\u003c\/p\u003e\u003cp\u003eThe furnace must keep up too. A 3-ton coil requires substantial airflow, and we check the condition of the furnace, the airflow of its blower and the duct sizes before the quote.\u003c\/p\u003e\u003ch3\u003eHeat pump and furnace through the seasons\u003c\/h3\u003e\u003cp\u003eA heat pump moves heat instead of producing it: in winter, it captures heat from the outdoor air and delivers it to the coil; in summer, a reversing valve flips the cycle. In fall, in spring and through a good part of winter, the heat pump heats alone. When the cold becomes too sharp for it, the \u003cstrong\u003ethermostat\u003c\/strong\u003e brings in the furnace's \u003cstrong\u003eelectric elements\u003c\/strong\u003e as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e. This pairing does not carry the cold-climate designation; the furnace's elements cover the coldest nights.\u003c\/p\u003e\u003cp\u003eThe rest of the time, those elements stay off: the heat pump carries the heating, and the electric furnace only tops it up. During defrost, the elements may heat for a few minutes so that the air from the grilles stays warm. The moment auxiliary heat comes in is set with you at commissioning, according to your house.\u003c\/p\u003e\u003ch3\u003eCooling and humidity\u003c\/h3\u003e\u003cp\u003eIn summer, the heat pump cools every room served by the ducts. The cold coil also removes humidity, and the condensed water flows through a drain to a floor drain or a pump. A right-sized unit runs long enough on each cycle to dry the air throughout the house. We check the return air: a closed bedroom without a return stays warmer than the rest of the house.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eR4H5S36AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X36M17A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility. This page therefore publishes no rating figure.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003egrant for efficient heat pumps\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eThe installation, from the yard to the basement\u003c\/h2\u003e\u003ch3\u003eChoosing the location\u003c\/h3\u003e\u003cp\u003eThe location of the outdoor unit is decided during the visit, with you. We look for a spot close to the mechanical room, to keep the copper line short, and clear all around, so that air flows freely through the unit and the technician can reach it. We avoid bedroom windows, yours as well as the neighbour's, and corners where the hot air rejected in summer would stay trapped.\u003c\/p\u003e\u003cp\u003eIn a narrow side yard, the choices narrow. Some municipalities also regulate where outdoor equipment may go, and we take that into account. We present the chosen location to you before the work, so that there are no surprises on the day itself.\u003c\/p\u003e\u003ch3\u003eSnow, ice and defrost water\u003c\/h3\u003e\u003cp\u003eA heat pump runs in winter: it must stay above the snow line, on a wall bracket or a raised pad. It must not sit under a gutter or a roof edge that would drench it with meltwater, since that water freezes on the unit. During defrost, the unit also releases water: we choose a spot where it will not form ice on a driveway, a staircase or a walkway. And unlike an air conditioner, the unit is not covered in winter.\u003c\/p\u003e\u003cp\u003eWall bracket or pad: the choice depends on the wall, the yard and the snow that usually builds up in that spot. A wall bracket easily keeps the unit above the snow, but we avoid fastening it to a bedroom wall, so as not to transmit vibration into it. A raised pad, set on the ground away from the wall, is often better in that case.\u003c\/p\u003e\u003ch3\u003eRefrigerant line and electrical\u003c\/h3\u003e\u003cp\u003eThe insulated copper line goes through the wall via a sealed opening, then reaches the coil by the most direct route. It is brazed, pressure tested and put under vacuum before the valves are opened. Outside, we protect it where it could get snagged.\u003c\/p\u003e\u003cp\u003eThe unit gets a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e and a nearby disconnect, within sight of the unit. During the visit, we check the free space and capacity of the panel, which already feeds the furnace's elements; if work is needed, it appears in the quote. The control wiring connects the new thermostat, the furnace and the outdoor unit.\u003c\/p\u003e\u003ch3\u003eIn the basement: the 17.5 in. coil and commissioning\u003c\/h3\u003e\u003cp\u003eThe 17.5 in. coil is set on the furnace's air outlet; if it does not line up with it, we fabricate a sealed transition. We measure the clearance above the furnace and identify any humidifier mounted on the plenum. The condensate drain goes to a floor drain or a pump, with a steady slope. At commissioning, we check the refrigerant charge, airflow, defrost and the furnace's elements coming in, then we explain the thermostat to you.\u003c\/p\u003e\u003ch3\u003eMaintenance and warranty\u003c\/h3\u003e\u003cp\u003eThe furnace filter now works all year: check it every month and replace it according to its format. After a storm, clear the snow around the outdoor unit and make sure nothing blocks the air; in fall, remove the leaves. Plan annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the coil, the condensate drain and the electrical connections, in addition to a check of the electric furnace and its elements. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 3 Tons - 36,000 BTU (Coil EVD4X 17.5 in.) - R410A. We assess the home room by room, choose the outdoor unit's location with you and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67798916890916,"sku":"R4H5S36AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_R4H5S_3_TONNES_36000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082540"},{"product_id":"thermopompe-centrale-add-on-arcoaire-h4h5s-ion-3-tonnes-36000-btu-serpentin-evd4x-17-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE H4H5S ION | 3 Tons - 36,000 BTU (Coil EVD4X 17.5 in.) - R410A","description":"\u003ch2\u003eChoosing three tons for the right reasons: the load calculation comes first\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eADD-ON\u003c\/strong\u003e system adds a heat pump to an existing \u003cstrong\u003eelectric furnace\u003c\/strong\u003e: a \u003cstrong\u003ecoil\u003c\/strong\u003e is installed on the furnace and the outdoor unit heats and cools through the same \u003cstrong\u003educts\u003c\/strong\u003e. The furnace is only used as backup, through its electric elements. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE H4H5S ION | 3 Tons - 36,000 BTU (Coil EVD4X 17.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eH4H5S36AKAAA\u003c\/strong\u003e outdoor unit, from the ION series, with the \u003cstrong\u003eEVD4X36M17A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eA large house does not automatically call for a large heat pump. In an ADD-ON system, the size is chosen according to a precise logic, and the \u003cstrong\u003eload calculation\u003c\/strong\u003e is what says whether 3 tons is the right choice for yours. This page explains that logic, then what the installation includes.\u003c\/p\u003e\u003ch3\u003eTwo loads to calculate, not one\u003c\/h3\u003e\u003cp\u003eEvery house has two distinct needs: the heat to supply in winter to make up for its losses, and the heat to remove in summer to stay cool. In Quebec, the first is almost always larger than the second. A heat pump sized to cover the deep cold on its own would therefore be too big for summer.\u003c\/p\u003e\u003cp\u003eThe ADD-ON system resolves this dilemma: since the furnace's electric elements cover the coldest nights, the heat pump is sized first on cooling, while checking that it carries a good share of the heating the rest of the year. The result is a unit that is right for summer, and a house that stays warm in winter.\u003c\/p\u003e\u003ch3\u003eWhat we measure, room by room\u003c\/h3\u003e\u003cp\u003eThe load calculation is not based on floor area alone. During the visit, we record for each room the exterior walls and their insulation, the attic or roof above, the size and orientation of the windows, the overall airtightness of the house and how the rooms are used: an open kitchen, an office full of equipment or a glassed-in sunroom do not behave like a north-facing bedroom. The basement, partly below ground, is counted separately.\u003c\/p\u003e\u003cp\u003eThis survey gives two results: the size of the heat pump, and the airflow each room must receive. The second is then used to check the ducts and to balance the dampers at commissioning.\u003c\/p\u003e\u003ch3\u003eWhy an oversized unit hurts comfort\u003c\/h3\u003e\u003cp\u003eAn oversized unit reaches the setpoint in a few minutes, shuts off, then starts again. These short cycles do not give the coil time to remove humidity: the house is cool, but clammy. They also create differences between the rooms near the thermostat and the others, and they wear the components more. In an ADD-ON system, an oversized unit causes another difficulty: it asks the furnace blower for more air than it can deliver.\u003c\/p\u003e\u003ch3\u003eWhen three tons is the right choice\u003c\/h3\u003e\u003cp\u003eThe 3-ton size suits roomy homes whose cooling load justifies it: a large cottage, a bungalow with a large finished basement, an open-plan house with many south- or west-facing windows. If the house already has a central air conditioner of this size that cooled it well, that is a useful clue; if it cooled in fits and starts, that is one too. A recent, well-insulated house, even a large one, is sometimes fine with the next size down.\u003c\/p\u003e\u003ch3\u003eSummer: cool, dry air\u003c\/h3\u003e\u003cp\u003eIn cooling mode, the cold coil removes heat and humidity from the air; the condensed water flows through a drain to a floor drain or a pump. Summer is when the right size shows the most: a properly sized unit runs in long, steady cycles, keeps humidity low and spreads cool air all the way to the rooms far from the furnace. In an open-plan house, large windows exposed to the afternoon sun call for well-placed supplies; we check their position and the return air during the visit.\u003c\/p\u003e\u003ch3\u003eWhat the size changes for winter\u003c\/h3\u003e\u003cp\u003eA heat pump moves heat instead of producing it. In winter, its refrigerant, \u003cstrong\u003eR-410A\u003c\/strong\u003e, captures heat from the outdoor air and delivers it to the coil; in summer, a reversing valve flips the cycle. The colder it gets, the less heat it captures, while the house loses more. The point where the two cross determines when the furnace's elements must take over: a properly sized heat pump pushes that moment fairly deep into winter, without being too big for summer.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003ethermostat\u003c\/strong\u003e manages this handover: it brings in the furnace's \u003cstrong\u003eelectric elements\u003c\/strong\u003e as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e when the heat pump is no longer enough, and leaves them off the rest of the time. During defrost, they may heat for a few minutes so that the air from the grilles stays warm. This pairing does not carry the cold-climate designation; the furnace's elements cover the coldest nights.\u003c\/p\u003e\u003ch3\u003eThe furnace and the ducts must keep up\u003c\/h3\u003e\u003cp\u003eWe check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. A 3-ton coil requires substantial airflow: the furnace must be able to deliver it, and the ducts, especially the returns, must be able to carry it. The 17.5 in. coil is set on the furnace's air outlet; if it does not line up with it, we fabricate a sealed transition. If duct adjustments are needed, they appear in the quote.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eH4H5S36AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X36M17A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility. This page therefore publishes no rating figure.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's \u003cstrong\u003eLogisVert\u003c\/strong\u003e list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size. Our page on the \u003ca href=\"\/en\/pages\/subvention-thermopompes-efficaces-dhydro-quebec\"\u003egrant for efficient heat pumps\u003c\/a\u003e summarizes the program's conditions.\u003c\/p\u003e\u003ch2\u003eInstallation by AirGreen\u003c\/h2\u003e\u003ch3\u003eThe work and commissioning\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eCoil\u003c\/strong\u003e: set on the furnace's air outlet, connected to the plenum, condensate drain to a floor drain or a pump; relocation of a humidifier mounted on the plenum if applicable.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eOutdoor unit\u003c\/strong\u003e: on a bracket or a pad, above the snow line, away from roof drips, dryer vents and bedroom windows.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eRefrigerant line\u003c\/strong\u003e: insulated copper, brazing, pressure test and vacuum before the valves are opened.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eElectrical\u003c\/strong\u003e: \u003cstrong\u003ededicated circuit\u003c\/strong\u003e, outdoor disconnect, check of the panel, which already carries the electric furnace's elements, and control wiring.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eThermostat\u003c\/strong\u003e: a model that manages the heat pump and electric auxiliary heat, since a furnace-only thermostat cannot control a heat pump.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eCommissioning\u003c\/strong\u003e: refrigerant charge, airflow according to the load calculation, defrost, the furnace's elements coming in and balancing of the dampers.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eMaintenance and warranty\u003c\/h3\u003e\u003cp\u003eThe furnace filter now works all year: check it every month and replace it according to its format. Keep the outdoor unit clear of snow and leaves, without covering it in winter. Plan annual \u003cstrong\u003eHVAC\u003c\/strong\u003e maintenance of the coil, the condensate drain and the electrical connections, in addition to a check of the electric furnace and its elements. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE H4H5S ION | 3 Tons - 36,000 BTU (Coil EVD4X 17.5 in.) - R410A. We do the load calculation room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67798927638820,"sku":"H4H5S36AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_H4H5S_3_TONNES_36000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082528"},{"product_id":"thermopompe-centrale-add-on-arcoaire-h4h7t-ion-2-stages-3-tonnes-36000-btu-serpentin-evd4x-17-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE H4H7T ION 2 stages | 3 Tons - 36,000 BTU (Coil EVD4X 17.5 in.) - R410A","description":"\u003ch2\u003eA two-stage heat pump that works with the furnace you already have\u003c\/h2\u003e\u003cp\u003eThe ADD-ON system adds a heat pump to an existing electric furnace: a coil is installed on the furnace and the outdoor unit heats and cools through the same ducts. The furnace is only used as backup, through its electric elements. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE H4H7T ION 2 stages | 3 Tons - 36,000 BTU (Coil EVD4X 17.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eH4H7T36AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X36M17A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eThis pairing is for homeowners who have an \u003cstrong\u003eelectric furnace\u003c\/strong\u003e in good condition and a \u003cstrong\u003educt\u003c\/strong\u003e system that already serves the whole house. Instead of replacing everything, you keep what works and hand most of the heating season, along with all of the summer cooling, to a \u003cstrong\u003ecentral heat pump\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eThe 3-ton size: which home it suits\u003c\/h3\u003e\u003cp\u003eA \u003cstrong\u003e3-ton\u003c\/strong\u003e system is often found in a mid-size two-storey house, a bungalow with a finished basement or a semi-detached home on two levels in \u003cstrong\u003eLaval\u003c\/strong\u003e or on the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e. These examples are only a guide. Wall and attic insulation, the age of the windows, the orientation of the house and the airtightness of the envelope change the result considerably: two homes that look alike can need different sizes.\u003c\/p\u003e\u003cp\u003eIn an ADD-ON installation, we size the heat pump first on the cooling load. The furnace's electric elements remain in place for the coldest days, so there is no need to oversize the outdoor unit so that it covers the whole winter on its own. An oversized unit cools in short cycles, removes less humidity and wears out faster. A room-by-room \u003cstrong\u003eload calculation\u003c\/strong\u003e settles the question before the quote.\u003c\/p\u003e\u003ch3\u003eA two-stage compressor\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eH4H7T36AKAAA\u003c\/strong\u003e outdoor unit belongs to Arcoaire's ION 2 stages series and uses a \u003cstrong\u003etwo-stage compressor\u003c\/strong\u003e: a reduced stage for the hours when the house asks for little, and a full stage for the hours when it needs all of the capacity. The reduced stage lengthens cycles in mild weather, which keeps the temperature more even from one room to the next.\u003c\/p\u003e\u003cp\u003eIn an ADD-ON, this flexibility adds to that of the furnace. In spring and fall, the compressor runs mostly on its reduced stage; when the first cold spells arrive, it moves to the full stage; and when the heat pump is no longer enough, the furnace's electric elements come in as backup. Three levels of response, from a single installation.\u003c\/p\u003e\u003ch3\u003eRatings that depend on your furnace\u003c\/h3\u003e\u003cp\u003eThe AHRI certification directory lists the pairing of the \u003cstrong\u003eH4H7T36AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X36M17A\u003c\/strong\u003e coil only with specific furnaces: the SEER2 and HSPF2 ratings depend on the blower of the furnace in place. We confirm them with your furnace model before the quote.\u003c\/p\u003e\u003cp\u003eThat is why this page shows no efficiency rating: a rating published with a furnace other than yours would not describe your installation. During the visit, we record the brand, model and serial number of the furnace, then give you the confirmed ratings in writing, with the quote.\u003c\/p\u003e\u003ch3\u003eThe furnace blower, the key part of the system\u003c\/h3\u003e\u003cp\u003eIn an ADD-ON, neither the outdoor unit nor the coil moves the air in the house: the \u003cstrong\u003efurnace blower\u003c\/strong\u003e pushes the air through the coil, then into the ducts. Well-adjusted airflow gives the coil what it needs. Airflow that is too low reduces capacity and can freeze the coil in cooling mode; airflow that is too high hurts dehumidification.\u003c\/p\u003e\u003cp\u003eWe check the type of motor, the speeds available and the general condition of the blower, then set the cooling and heat pump heating speeds at commissioning. If the blower is near the end of its life, we tell you before the quote rather than after the installation.\u003c\/p\u003e\u003ch3\u003eThe thermostat: when electric auxiliary heat comes in\u003c\/h3\u003e\u003cp\u003eEvery ADD-ON relies on auxiliary-heat logic. A compatible \u003cstrong\u003ethermostat\u003c\/strong\u003e, often connected to an outdoor sensor, decides at each call for heat whether the heat pump is enough or whether the furnace's \u003cstrong\u003eelectric elements\u003c\/strong\u003e should come in as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e. In cool weather, the heat pump heats alone and the elements stay off. When the cold deepens and it can no longer hold the set point, the elements top up the heat.\u003c\/p\u003e\u003cp\u003eThe moment auxiliary heat comes in takes into account the heat loss of the house, the furnace in place and your priorities: some people want the heat pump to work as long as possible, to keep the elements off, others prefer warmer air as soon as the temperature drops. We set it at commissioning and show you how to change it.\u003c\/p\u003e\u003cp\u003eOne detail sometimes surprises people: the air delivered by the heat pump feels warm rather than hot, and the cycles are longer than with the furnace alone. The house stays at a more even temperature; this is normal operation. During the outdoor unit's defrost, the furnace's elements may also heat briefly so that cool air does not circulate in the rooms.\u003c\/p\u003e\u003ch3\u003eSummer cooling and dehumidification\u003c\/h3\u003e\u003cp\u003eIn summer, the same coil cools the air and removes humidity, which flows through a condensate drain to the floor drain or to a condensate pump. The whole house is cooled through the existing \u003cstrong\u003educts\u003c\/strong\u003e, with no units in the windows. The compressor's reduced stage suits hot, humid days well, when the house mostly needs to be dried out.\u003c\/p\u003e\u003cp\u003eIf the upper floor stays warmer than the main floor, the cause is often in the duct system: poorly balanced registers or not enough return air upstairs. We look at this during the visit and suggest corrections when needed.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's LogisVert list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and a compatible thermostat decides when the heat pump heats alone and when the furnace's elements take over. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The outdoor unit goes on a stand, above the snow line, on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eProject steps\u003c\/h3\u003e\u003col\u003e\u003cli\u003e\u003cstrong\u003eHome visit\u003c\/strong\u003e: survey of the electric furnace, the ducts, the electrical panel, which already carries the furnace's elements, and the planned location of the outdoor unit.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eRoom-by-room load calculation\u003c\/strong\u003e, to confirm that the 3-ton size suits the house.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eWritten quote\u003c\/strong\u003e, with the ratings confirmed for your furnace.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eInstallation of the 17.5 in. coil\u003c\/strong\u003e on the furnace, with a sheet-metal transition if the cabinet width differs, and connection of the condensate drain.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eOutdoor unit\u003c\/strong\u003e on a stand, away from roof drip, then routing of the insulated \u003cstrong\u003erefrigerant line set\u003c\/strong\u003e to the coil.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eElectrical\u003c\/strong\u003e: dedicated circuit, outdoor disconnect and control wiring between the thermostat, the furnace and the outdoor unit.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eCommissioning\u003c\/strong\u003e: nitrogen pressure test, vacuum, adjustment of the \u003cstrong\u003eR-410A\u003c\/strong\u003e charge, the airflow and the moment the thermostat brings in electric auxiliary heat.\u003c\/li\u003e\u003c\/ol\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC maintenance\u003c\/strong\u003e of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003eThe electric furnace also deserves a check of its elements and its blower. Its elements run fewer hours than before, but they must stay ready for the days when the heat pump hands over to them.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003eThe refrigeration and electrical licences cover both sides of an ADD-ON: the refrigerant circuit between the outdoor unit and the coil, and the electrical connection of the outdoor unit and the thermostat.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE H4H7T ION 2 stages | 3 Tons - 36,000 BTU (Coil EVD4X 17.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67798939304228,"sku":"H4H7T36AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_H4H7T_3_TONNES_36000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082528"},{"product_id":"thermopompe-centrale-add-on-arcoaire-n4h5s-performance-3-5-tonnes-42000-btu-serpentin-evd4x-17-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 3.5 Tons - 42,000 BTU (Coil EVD4X 17.5 in.) - R410A","description":"\u003ch2\u003eReplace the central air conditioner with a unit that also heats\u003c\/h2\u003e\u003cp\u003eThe ADD-ON system adds a heat pump to an existing electric furnace: a coil is installed on the furnace and the outdoor unit heats and cools through the same ducts. The furnace is only used as backup, through its electric elements. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 3.5 Tons - 42,000 BTU (Coil EVD4X 17.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eN4H5S42AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X42M17A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eMany homes heated by an \u003cstrong\u003eelectric furnace\u003c\/strong\u003e already have a \u003cstrong\u003ecentral air conditioner\u003c\/strong\u003e: an outdoor unit that only runs in summer and a coil sitting on the furnace. When that air conditioner reaches the end of its life, replacing it with a \u003cstrong\u003ecentral heat pump\u003c\/strong\u003e takes little more work, and the equipment starts working in winter too.\u003c\/p\u003e\u003ch3\u003eFrom air conditioner to heat pump: what changes\u003c\/h3\u003e\u003cp\u003eAn air conditioner and a heat pump look very much alike. Both have an outdoor unit, an indoor coil and a refrigerant line set between them. The difference lies mainly in a \u003cstrong\u003ereversing valve\u003c\/strong\u003e: in a heat pump, it reverses the refrigeration cycle in winter to capture heat from the outdoor air and deliver it to the coil, instead of rejecting the home's heat outside.\u003c\/p\u003e\u003cp\u003eIn practice, the replacement involves four items. The outdoor unit is changed. The existing coil makes way for the \u003cstrong\u003eEVD4X42M17A\u003c\/strong\u003e coil, designed to work in both directions. The thermostat is replaced with a model that can control both the heat pump and the furnace's electric elements. Finally, the location of the outdoor unit is reviewed, because equipment that works in winter is not installed like an air conditioner that sleeps under the snow.\u003c\/p\u003e\u003ch3\u003eThe 3.5-ton size\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e3.5-ton\u003c\/strong\u003e size sits between the common 3-ton and 4-ton sizes. It often suits a large house on two levels, a two-storey home with a finished basement and large south-facing windows, or a house whose old air conditioner struggled to keep the upper floor comfortable. These examples are only a guide: insulation, orientation, airtightness and sun exposure change the actual load.\u003c\/p\u003e\u003cp\u003eReplacing an air conditioner is the right time to redo the calculation. Many older units were chosen by eye, often oversized. A heat pump sized on the cooling load runs longer on each cycle, removes humidity better and leaves the coldest days to the furnace's elements. The \u003cstrong\u003eload calculation\u003c\/strong\u003e is done room by room, before the quote.\u003c\/p\u003e\u003ch3\u003eThe Performance series and the 17.5 in. coil\u003c\/h3\u003e\u003cp\u003eThe name Performance refers to the place of the \u003cstrong\u003eN4H5S42AKAAA\u003c\/strong\u003e unit in the Arcoaire lineup. For this size, we offer the same \u003cstrong\u003eEVD4X42M17A\u003c\/strong\u003e coil with several series of outdoor units; what sets them apart is the outdoor unit. The series name does not replace the ratings of the pairing, which we confirm before the quote.\u003c\/p\u003e\u003cp\u003eThe coil is a \u003cstrong\u003e17.5 in.\u003c\/strong\u003e format, a dimension that has to match the width of the furnace cabinet. When they match, the coil sits directly on the air outlet; when they differ, we fabricate a sheet-metal transition so that all of the air passes through the coil, with no leakage around the sides.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eN4H5S42AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X42M17A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility.\u003c\/p\u003e\u003cp\u003eThat is why no efficiency rating appears on this page. You receive the confirmed ratings in writing, with the quote, before you make your decision.\u003c\/p\u003e\u003ch3\u003eWinter: the heat pump first, the furnace's elements second\u003c\/h3\u003e\u003cp\u003eThe old air conditioner shut down in the fall. The heat pump keeps going: in cool weather, it heats on its own, and the \u003cstrong\u003ethermostat\u003c\/strong\u003e brings in the furnace's \u003cstrong\u003eelectric elements\u003c\/strong\u003e as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e when the heat pump can no longer hold the temperature. The moment auxiliary heat comes in is set at commissioning, based on the heat loss of the house and your comfort. Every hour the heat pump is enough is an hour those elements stay off.\u003c\/p\u003e\u003cp\u003eIn winter, the outdoor unit sometimes gets covered in frost. It melts it with short defrost cycles, during which a plume of vapour comes off the unit. Depending on the setting, the furnace's elements heat during that time so the air blown into the house stays warm.\u003c\/p\u003e\u003cp\u003eThe air delivered by the heat pump is cooler to the touch than the air from the furnace's elements, and the cycles are longer. Heat is spread more evenly through the house; this is normal operation.\u003c\/p\u003e\u003ch3\u003eSummer: the same comfort, better adjusted\u003c\/h3\u003e\u003cp\u003eIn cooling mode, little changes for you: cool air flows through the same \u003cstrong\u003educts\u003c\/strong\u003e and the same registers. The new coil removes humidity from the air; the water drains through the condensate line, which we check and connect to the floor drain or to a condensate pump. A new coil and properly adjusted airflow often make a clear difference compared with a worn-out unit.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's LogisVert list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and a compatible thermostat decides when the heat pump heats alone and when the furnace's elements take over. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The outdoor unit goes on a stand, above the snow line, on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eThe line set and R-410A\u003c\/h3\u003e\u003cp\u003eThe system runs on \u003cstrong\u003eR-410A\u003c\/strong\u003e. If the old air conditioner used the same refrigerant, the existing line set can sometimes be kept, provided its diameter suits the new pairing, it is in good condition and it passes a pressure test. If the old unit ran on an older refrigerant, or if the line set is damaged or poorly insulated, we replace it. We decide during the visit, and the quote spells it out.\u003c\/p\u003e\u003cp\u003eThe refrigerant in the old unit is recovered before it is taken apart, as regulations require. Commissioning then always follows the same sequence: nitrogen pressure test, vacuum, then charge adjustment according to the manufacturer's instructions.\u003c\/p\u003e\u003ch3\u003eThe outdoor unit, in the right place\u003c\/h3\u003e\u003cp\u003eThe old air conditioner often sat on a ground-level slab, sometimes behind a hedge or under a porch. That location does not always suit a heat pump, which works all winter. We install it on a stand, above the snow line, so that air flows freely and defrost water drains away without forming ice under the unit. We avoid roof drip, dryer vents and bedroom windows, and we check your municipality's rules on the location of outdoor equipment.\u003c\/p\u003e\u003cp\u003eThe electrical connection includes a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e, an outdoor disconnect within sight of the unit and control wiring to the furnace and thermostat. We also check that the electrical panel, which already feeds the furnace's elements, has the required capacity.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC maintenance\u003c\/strong\u003e of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003eBecause the heat pump now runs in winter as well as summer, the filter gets dirty faster than in the days of the air conditioner alone. Check it every month for the first few seasons, until you know its pace. The electric furnace, for its part, still deserves a check of its elements and its blower.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 3.5 Tons - 42,000 BTU (Coil EVD4X 17.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67798947266852,"sku":"N4H5S42AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_N4H5S_3_5_TONNES_42000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082539"},{"product_id":"thermopompe-centrale-add-on-arcoaire-hsh4-haut-de-gamme-3-5-tonnes-42000-btu-serpentin-evd4x-17-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE HSH4 Premium | 3.5 Tons - 42,000 BTU (Coil EVD4X 17.5 in.) - R410A","description":"\u003ch2\u003eTwo heat sources, one thermostat that picks the right one\u003c\/h2\u003e\u003cp\u003eThe ADD-ON system adds a heat pump to an existing electric furnace: a coil is installed on the furnace and the outdoor unit heats and cools through the same ducts. The furnace is only used as backup, through its electric elements. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE HSH4 Premium | 3.5 Tons - 42,000 BTU (Coil EVD4X 17.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eHSH442GKA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X42M17A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eAn ADD-ON system is only as good as the way its two heat sources share the winter. This page therefore focuses on what happens between the heat pump and the furnace's electric elements: which one heats, when, and how we set that decision for your home.\u003c\/p\u003e\u003ch3\u003eWhy keep the furnace\u003c\/h3\u003e\u003cp\u003eA \u003cstrong\u003ecentral heat pump\u003c\/strong\u003e heats very efficiently in mild and cool weather, but its capacity drops as the outdoor air gets colder, while the needs of the house rise. The existing \u003cstrong\u003eelectric furnace\u003c\/strong\u003e fills that gap with its heating elements. It is already installed, already connected to the \u003cstrong\u003educts\u003c\/strong\u003e, and it remains available for the days when the cold exceeds what the heat pump can supply alone.\u003c\/p\u003e\u003cp\u003eThis sharing also lets us size the heat pump on the cooling load rather than on the coldest day of the year. The unit stays well suited to summer, whereas an oversized unit would cool in short cycles and remove humidity poorly.\u003c\/p\u003e\u003ch3\u003eThe thermostat, the brain of the system\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eheat pump thermostat\u003c\/strong\u003e replaces the furnace thermostat. It controls the heat pump, the furnace's \u003cstrong\u003eelectric elements\u003c\/strong\u003e and the blower. Usually connected to an \u003cstrong\u003eoutdoor sensor\u003c\/strong\u003e, it knows the outside temperature and decides, at each call for heat, which source to start. In summer, it controls the cooling with the same device.\u003c\/p\u003e\u003cp\u003eThe furnace's elements become \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e: the thermostat brings them in when the heat pump can no longer hold the set point, and leaves them off the rest of the time. With an outdoor sensor, it can also stop the heat pump below a chosen temperature and let the elements heat alone. Both settings are set according to your house.\u003c\/p\u003e\u003ch3\u003eYour home's balance point\u003c\/h3\u003e\u003cp\u003eEvery house has its \u003cstrong\u003ebalance point\u003c\/strong\u003e: the outdoor temperature at which the heat supplied by the heat pump equals the heat the house loses. Above that point, the heat pump is enough. Below it, the furnace's elements have to add their heat. A well-insulated house has a lower balance point than a house that loses a lot of heat, because it needs less energy at the same outdoor temperature.\u003c\/p\u003e\u003cp\u003eThis point appears on no spec sheet: it depends on your house as much as on the equipment. We estimate it from the load calculation and the confirmed ratings of the pairing, then use it to set the thermostat.\u003c\/p\u003e\u003ch3\u003eComfort or consumption: two ways to set auxiliary heat\u003c\/h3\u003e\u003cp\u003eThe thermostat setting reflects your priorities. If you want the heat pump to heat as long as possible, we set auxiliary heat close to the balance point: the furnace's elements only step in when the heat pump truly can no longer keep up. If you prefer warmer air at the registers from the first real cold days, we let auxiliary heat come in earlier.\u003c\/p\u003e\u003cp\u003eWith an electric furnace, the first setting is almost always the more frugal one: the elements turn electricity into heat without capturing anything outdoors, whereas the heat pump moves heat from the outdoor air. We explain the effect of each setting during commissioning, and you can change it later as you get to know the system.\u003c\/p\u003e\u003ch3\u003eDefrost, without a cold draft\u003c\/h3\u003e\u003cp\u003eIn cold, humid weather, frost forms on the outdoor unit's coil. The heat pump clears it with short defrost cycles, during which a plume of white vapour comes out of the unit; this is normal. During these cycles, the control can briefly run the furnace's elements so that the air coming out of the registers stays warm. We check this behaviour at commissioning.\u003c\/p\u003e\u003ch3\u003eWhat the heat pump changes for the electric furnace\u003c\/h3\u003e\u003cp\u003eIn a home heated by an electric furnace, the heating elements used to provide all of the heating. With the heat pump, they become a supplement: the heat pump covers the larger part of the season, and the elements are only used when the cold deepens or during defrost. The furnace runs fewer hours, but it must stay in good condition, ready to take over.\u003c\/p\u003e\u003cp\u003eOn the electrical panel, nothing is removed: the furnace's elements stay connected for the coldest nights, and the outdoor unit is added on its own circuit. That is why the panel's capacity is part of the visit, just like the furnace and the ducts.\u003c\/p\u003e\u003ch3\u003eThe 3.5-ton size and the 17.5 in. coil\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e3.5-ton\u003c\/strong\u003e size often serves a large house on two levels, a two-storey home with a finished basement or a bungalow with a lot of glazing in \u003cstrong\u003eLongueuil\u003c\/strong\u003e or on the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e. These examples are only a guide: insulation, window age and airtightness change the actual load, and a room-by-room \u003cstrong\u003eload calculation\u003c\/strong\u003e settles it before the quote.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eEVD4X42M17A\u003c\/strong\u003e coil is a \u003cstrong\u003e17.5 in.\u003c\/strong\u003e format; it has to match the width of the furnace cabinet, with a sheet-metal transition when needed. In summer, the same coil cools and dries the air of the whole house, and condensate drains to the floor drain or a pump. The name Premium indicates the rank of the \u003cstrong\u003eHSH442GKA\u003c\/strong\u003e unit in the Arcoaire lineup; it does not replace the ratings of the pairing.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eHSH442GKA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X42M17A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility.\u003c\/p\u003e\u003cp\u003eThese ratings are also used to estimate the house's balance point and to set the thermostat's auxiliary heat. That is one more reason to confirm them in writing rather than rely on an approximate value; this page therefore shows none.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's LogisVert list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and a compatible thermostat decides when the heat pump heats alone and when the furnace's elements take over. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The outdoor unit goes on a stand, above the snow line, on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eControl wiring and commissioning\u003c\/h3\u003e\u003cp\u003eA heat pump thermostat needs more conductors than an ordinary furnace thermostat. The existing wire is sometimes enough; otherwise, we run a new cable between the thermostat and the furnace. A second cable connects the furnace to the outdoor unit, and the outdoor sensor, when one is planned, is installed out of direct sun and away from the air discharged by the unit.\u003c\/p\u003e\u003cp\u003eOn the power side, the outdoor unit is fed by a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e and an outdoor disconnect; we check before the quote that the panel can carry the unit in addition to the furnace's elements. The unit sits on a stand above the snow line, away from roof drip and bedroom windows.\u003c\/p\u003e\u003cp\u003eAt commissioning, we perform the nitrogen pressure test and the vacuum on the \u003cstrong\u003erefrigerant line set\u003c\/strong\u003e, adjust the \u003cstrong\u003eR-410A\u003c\/strong\u003e charge and the airflow, then test each mode: cooling, heat pump heating, auxiliary heat from the furnace's elements and defrost.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC maintenance\u003c\/strong\u003e of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003eAlso keep the outdoor sensor clear: a sensor buried in snow or exposed to a warm air outlet distorts the thermostat's decision. Also have the electric furnace, its elements and its blower checked during the annual maintenance.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE HSH4 Premium | 3.5 Tons - 42,000 BTU (Coil EVD4X 17.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67799179231524,"sku":"HSH442GKA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_HSH4_3_5_TONNES_42000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082539"},{"product_id":"thermopompe-centrale-add-on-arcoaire-r4h5s-economique-3-5-tonnes-42000-btu-serpentin-evd4x-17-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 3.5 Tons - 42,000 BTU (Coil EVD4X 17.5 in.) - R410A","description":"\u003ch2\u003eKeep what works in the house and add what is missing\u003c\/h2\u003e\u003cp\u003eThe ADD-ON system adds a heat pump to an existing electric furnace: a coil is installed on the furnace and the outdoor unit heats and cools through the same ducts. The furnace's electric elements are only used as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 3.5 Tons - 42,000 BTU (Coil EVD4X 17.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eR4H5S42AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X42M17A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eThe ADD-ON starts from a simple observation: in many homes, the \u003cstrong\u003eelectric furnace\u003c\/strong\u003e and the \u003cstrong\u003educts\u003c\/strong\u003e still have good years ahead of them. It would be a shame to replace them only to get air conditioning and more efficient heating. This pairing adds a \u003cstrong\u003ecentral heat pump\u003c\/strong\u003e to the existing system and leaves in place everything that is still in good condition.\u003c\/p\u003e\u003ch3\u003eWhat you keep\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eThe electric furnace\u003c\/strong\u003e, whose heating elements become the backup for the coldest days.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eThe duct system\u003c\/strong\u003e, the supply registers and the return air grilles.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eThe filter rack\u003c\/strong\u003e and the filter format you already know.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eAccessories\u003c\/strong\u003e connected to the furnace, such as a humidifier, in most cases; we check their position relative to the coil.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eThe thermostat location\u003c\/strong\u003e, even though the device itself changes.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eWhat the installation adds\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eThe \u003cstrong\u003eR4H5S42AKAAA\u003c\/strong\u003e outdoor unit, on a stand above the snow line.\u003c\/li\u003e\u003cli\u003eThe \u003cstrong\u003eEVD4X42M17A\u003c\/strong\u003e coil, a \u003cstrong\u003e17.5 in.\u003c\/strong\u003e format, placed on the furnace's air outlet.\u003c\/li\u003e\u003cli\u003eAn insulated \u003cstrong\u003erefrigerant line set\u003c\/strong\u003e between the outdoor unit and the coil.\u003c\/li\u003e\u003cli\u003eA \u003cstrong\u003econdensate drain\u003c\/strong\u003e to the floor drain or a pump.\u003c\/li\u003e\u003cli\u003eA \u003cstrong\u003ededicated circuit\u003c\/strong\u003e and an outdoor disconnect.\u003c\/li\u003e\u003cli\u003eA \u003cstrong\u003eheat pump thermostat\u003c\/strong\u003e that controls the heat pump and brings in the furnace's electric elements as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e.\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eIf an old central air conditioner already had its coil and line set, we assess what can be kept. The coil itself is replaced, since it must now work in heating as well as cooling.\u003c\/p\u003e\u003ch3\u003eThe furnace: what we check before proposing an ADD-ON\u003c\/h3\u003e\u003cp\u003eAn ADD-ON is only worthwhile if the furnace that goes with it is reliable. During the visit, we examine:\u003c\/p\u003e\u003cul\u003e\u003cli\u003ethe age and general condition of the furnace, along with its maintenance history;\u003c\/li\u003e\u003cli\u003ethe width of the cabinet, to match it to the 17.5 in. coil;\u003c\/li\u003e\u003cli\u003ethe blower: type of motor, speeds available and ability to deliver the airflow the coil requires;\u003c\/li\u003e\u003cli\u003ethe clearance above the furnace, since the coil fits between the air outlet and the plenum;\u003c\/li\u003e\u003cli\u003ethe condition of the heating elements and their connections, and the compatibility of the furnace control with a heat pump thermostat that manages auxiliary heat.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eWhen an ADD-ON is not the right choice\u003c\/h3\u003e\u003cp\u003eWe sometimes advise against this type of installation. A furnace at the end of its life, a blower unable to deliver the required airflow or a duct system too small for air conditioning turn a simple addition into a series of compromises. In those cases, a \u003cstrong\u003ecentral heat pump\u003c\/strong\u003e paired with a new air handler, which replaces the furnace, is often the most sensible long-term solution.\u003c\/p\u003e\u003cp\u003eIf the furnace shows signs of advanced wear, such as heating elements that keep failing, electrical connections that have overheated or a tired blower, it is better to settle that question before adding anything to it. We would rather tell you during the visit than install a new coil on equipment that will need replacing shortly after.\u003c\/p\u003e\u003ch3\u003eThe Economy series\u003c\/h3\u003e\u003cp\u003eThe name Economy designates the series of the \u003cstrong\u003eR4H5S42AKAAA\u003c\/strong\u003e unit in the Arcoaire lineup. The \u003cstrong\u003eEVD4X42M17A\u003c\/strong\u003e coil is the same as in the other series of this size; it is the outdoor unit that changes. In an ADD-ON, the furnace's electric elements handle the coldest days: the heat pump concentrates on summer cooling and on heating in the shoulder seasons, and the choice of series becomes a matter of priorities.\u003c\/p\u003e\u003cp\u003eThe series name does not tell the whole story, though. What counts are the ratings of the pairing, and we confirm them before the quote.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eR4H5S42AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X42M17A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility.\u003c\/p\u003e\u003cp\u003eThis page therefore shows no efficiency rating. The confirmed ratings, provided in writing, let you compare this series with the other options of the same size on a concrete basis.\u003c\/p\u003e\u003ch3\u003eThe 3.5-ton size\u003c\/h3\u003e\u003cp\u003eThis size often suits a family home of good size: a two-storey house with a finished basement in \u003cstrong\u003eLaval\u003c\/strong\u003e, a split-level on the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, an extended bungalow. These examples are only a guide, since insulation, windows and airtightness change the load. Because the furnace's electric elements cover the deep cold, we size the heat pump on the cooling load, established by a room-by-room \u003cstrong\u003eload calculation\u003c\/strong\u003e: an oversized unit cools in short cycles and dries the air poorly.\u003c\/p\u003e\u003ch3\u003eWinter and summer, day to day\u003c\/h3\u003e\u003cp\u003eIn mild and cool weather, the heat pump heats alone. When the cold deepens and it can no longer keep up, the \u003cstrong\u003ethermostat\u003c\/strong\u003e brings in the furnace's electric elements as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e; in deep cold, they carry the heating. The point at which the backup comes in is set according to the heat loss of the house and your preferences; we set it at commissioning. The air delivered by the heat pump is less hot than the air from the electric elements and the cycles are longer: this is normal. During defrost cycles, a plume of vapour comes out of the outdoor unit, and the furnace's elements may come on briefly to keep the supply air comfortable.\u003c\/p\u003e\u003cp\u003eIn summer, the same unit cools the whole house through the existing ducts. The coil removes humidity from the air, and the water goes to the condensate drain. If the upper floor stays warmer than the main floor, we look at register balancing and return air during the visit.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's LogisVert list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and a compatible thermostat decides when the heat pump heats alone and when the electric furnace takes over. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The outdoor unit goes on a stand, above the snow line, on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eOn site, the order of work stays the same: installation of the coil and drain, installation of the stand and outdoor unit away from roof drip, routing of the line set, electrical connection, then commissioning with a nitrogen pressure test, vacuum, and adjustment of the \u003cstrong\u003eR-410A\u003c\/strong\u003e charge, the airflow and the thermostat's auxiliary heat setting.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC maintenance\u003c\/strong\u003e of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003eThe filter stays where it was, at the furnace inlet. It now also protects the coil: a clogged filter reduces the airflow and the capacity of the system, summer and winter. The electric furnace keeps its usual maintenance, centred on the blower, the heating elements and their connections.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 3.5 Tons - 42,000 BTU (Coil EVD4X 17.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67799184998692,"sku":"R4H5S42AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_R4H5S_3_5_TONNES_42000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082540"},{"product_id":"thermopompe-centrale-add-on-arcoaire-hsh6-haut-de-gamme-3-5-tonnes-42000-btu-serpentin-evd4x-17-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE HSH6 Premium | 3.5 Tons - 42,000 BTU (Coil EVD4X 17.5 in.) - R410A","description":"\u003ch2\u003eA heat pump on the furnace, and ducts ready to keep up\u003c\/h2\u003e\u003cp\u003eThe ADD-ON system adds a heat pump to an existing electric furnace: a coil is installed on the furnace and the outdoor unit heats and cools through the same ducts. The furnace's electric elements are only used as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE HSH6 Premium | 3.5 Tons - 42,000 BTU (Coil EVD4X 17.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eHSH642GKA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X42M17A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eIn a central system, the equipment only does half the work. The other half belongs to the \u003cstrong\u003educt\u003c\/strong\u003e system: it carries warm or cool air to each room and brings it back to the coil. A well-chosen heat pump connected to an ill-suited duct system gives a house with uneven temperatures, noisy registers or a poorly cooled upper floor. This page explains what we look at in your ducts before proposing this pairing.\u003c\/p\u003e\u003ch3\u003eWhat air conditioning asks of the ducts\u003c\/h3\u003e\u003cp\u003eMany duct systems were designed for an electric furnace alone. Yet, for the same capacity, air conditioning and heat pump heating move more air than the furnace's heating elements, because the air comes out less hot, or cooler. A duct system sized tightly for the furnace can therefore become too narrow once the coil is added.\u003c\/p\u003e\u003cp\u003eThe signs are well known: whistling at the grilles, registers that blow hard near the furnace and weakly at the end of the run, a blower that struggles. We observe and measure the duct system during the visit; the quote specifies any corrections needed.\u003c\/p\u003e\u003ch3\u003eReturn air, often the weak link\u003c\/h3\u003e\u003cp\u003eThe blower can only push the air it receives. In many homes, supply registers are plentiful but return grilles are scarce, sometimes a single one on the main floor. The blower is then starved of air, airflow at the coil drops, and the heat pump's capacity drops with it.\u003c\/p\u003e\u003cp\u003eAdding a return upstairs or enlarging an existing grille often fixes several things at once: better airflow, less noise, a more even temperature between levels. We tell you whether it would help in your home and where that return could run.\u003c\/p\u003e\u003ch3\u003eThe upper floor that is too warm in summer\u003c\/h3\u003e\u003cp\u003eCool air is heavier than warm air and tends to stay low, while heat from the roof builds up high. In a two-level house cooled from the basement, the upper floor is therefore often the hardest area. Three levers help: balancing the dampers to send more air upstairs in summer, a return upstairs, and adjusting the speed of the furnace blower.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eEVD4X42M17A\u003c\/strong\u003e coil also removes humidity from the air. A less humid house feels cooler at the same temperature, which helps the upper floor stay comfortable on warm nights.\u003c\/p\u003e\u003ch3\u003eThe 17.5 in. coil and the plenum\u003c\/h3\u003e\u003cp\u003eThe coil fits between the furnace's air outlet and the supply \u003cstrong\u003eplenum\u003c\/strong\u003e, the sheet-metal box from which the main ducts branch out. Clearance is therefore needed above the furnace, and the existing plenum is often modified or rebuilt to accommodate the coil. The \u003cstrong\u003e17.5 in.\u003c\/strong\u003e format has to match the width of the furnace cabinet; if they differ, a sealed sheet-metal transition joins them.\u003c\/p\u003e\u003cp\u003eThe coil also adds resistance to the airflow. On a duct system that is already tight, it matters: one more reason to check the ducts before the installation rather than after. Finally, we seal the joints around the coil so that all of the air passes through it.\u003c\/p\u003e\u003ch3\u003eDucts in unheated spaces\u003c\/h3\u003e\u003cp\u003eA duct that runs through a garage, a crawl space or an attic loses heat in winter and gains heat in summer. In cooling mode, its cold surface can also condense humidity from the surrounding air and drip. These sections must be well insulated and sealed. We locate them during the visit and tell you whether they need correcting.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eHSH642GKA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X42M17A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility.\u003c\/p\u003e\u003cp\u003eA system's ratings are established under standardized test conditions; in your home, the condition of the ducts affects what the system actually delivers. That is why we check the ducts at the same time as we confirm the ratings, and why this page shows none.\u003c\/p\u003e\u003ch3\u003eThe 3.5-ton size and the HSH6 series\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e3.5-ton\u003c\/strong\u003e size often suits a good-sized two-storey house, a house on two levels with a finished basement, or a townhouse in \u003cstrong\u003eMontreal\u003c\/strong\u003e whose duct system serves three levels. These examples are only a guide: insulation, sun exposure and airtightness change the load, which we establish with a room-by-room \u003cstrong\u003eload calculation\u003c\/strong\u003e. In an ADD-ON, the furnace's electric elements cover the deep cold, which lets us size the heat pump on cooling and avoid the short cycles of an oversized unit.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eHSH642GKA\u003c\/strong\u003e unit belongs to the HSH6 series, one of Arcoaire's Premium series. The coil is the same as in the other series of this size; the outdoor unit makes the difference, and the ratings of the pairing are confirmed before the quote.\u003c\/p\u003e\u003ch3\u003eWinter with two heat sources\u003c\/h3\u003e\u003cp\u003eIn cool weather, the heat pump heats alone, and air circulates through the ducts for longer, at a milder temperature than with the furnace's electric elements. When the cold deepens and the heat pump can no longer keep up, the \u003cstrong\u003ethermostat\u003c\/strong\u003e brings those elements in as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e; in deep cold, they carry most of the heating. The auxiliary heat threshold is set at commissioning according to the house and your preferences. During defrost cycles, the elements may come on briefly so that the air at the registers stays warm.\u003c\/p\u003e\u003cp\u003eThese longer cycles have a useful effect on distribution: air passes through the filter more often, and the temperature varies less from one room to the next.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's LogisVert list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and a compatible thermostat decides when the heat pump heats alone and when the electric furnace takes over. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The outdoor unit goes on a stand, above the snow line, on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe insulated \u003cstrong\u003erefrigerant line set\u003c\/strong\u003e connects the outdoor unit to the coil; it undergoes a nitrogen pressure test and a vacuum before the \u003cstrong\u003eR-410A\u003c\/strong\u003e charge. At commissioning, we set the blower speed for cooling and heat pump heating, then check the air distribution at the main registers and the operation of the condensate drain.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC maintenance\u003c\/strong\u003e of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003eAlso keep the return grilles clear: furniture, a curtain or a rug blocking them reduces the airflow of the whole system. Dust the grilles from time to time, and leave the registers in unused rooms open, otherwise the duct system loses its balance.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003eThe ventilation licence matters especially in an ADD-ON: work on the plenum, the returns and the ducts is part of the same job as the heat pump.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE HSH6 Premium | 3.5 Tons - 42,000 BTU (Coil EVD4X 17.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67799189061924,"sku":"HSH642GKA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_HSH6_3_5_TONNES_42000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082539"},{"product_id":"thermopompe-centrale-add-on-arcoaire-h4h5s-ion-3-5-tonnes-42000-btu-serpentin-evd4x-17-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE H4H5S ION | 3.5 Tons - 42,000 BTU (Coil EVD4X 17.5 in.) - R410A","description":"\u003ch2\u003eAn outdoor unit that works all winter, placed accordingly\u003c\/h2\u003e\u003cp\u003eThe ADD-ON system adds a heat pump to an existing electric furnace: a coil is installed on the furnace and the outdoor unit heats and cools through the same ducts. The furnace's electric elements are only used as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE H4H5S ION | 3.5 Tons - 42,000 BTU (Coil EVD4X 17.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eH4H5S42AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X42M17A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eA central air conditioner spends the winter switched off. A heat pump works outside in cold weather, under snow and freezing rain. The location of the outdoor unit therefore becomes a major decision in the project, just like the choice of size. This page explains how we choose it.\u003c\/p\u003e\u003ch3\u003eWhat happens outside while the house is heating\u003c\/h3\u003e\u003cp\u003eIn heating mode, the outdoor unit captures the heat contained in the outdoor air, even cold air, and the \u003cstrong\u003eR-410A\u003c\/strong\u003e carries it to the coil on the furnace. The outdoor unit's coil then becomes colder than the surrounding air, and the air's moisture settles on it as frost. To clear it, the heat pump runs short defrost cycles: a plume of white vapour rises from the unit, and you may hear a brief whoosh when the reversing valve changes position. Both are normal.\u003c\/p\u003e\u003cp\u003eIn summer, the role reverses: the unit rejects outside the heat removed from the house. In both seasons, it needs open air around it to run normally.\u003c\/p\u003e\u003ch3\u003eAbove the snow, away from ice\u003c\/h3\u003e\u003cp\u003eA unit set on the ground can end up buried after a storm, or blocked by snow sliding off the roof or pushed aside when clearing the driveway. We install it on a stand that keeps it above the usual snow line on your property, taking into account the snowbanks that clearing creates every winter.\u003c\/p\u003e\u003cp\u003eThe stand also deals with water. During defrost, the water draining from the unit must be able to get away. On a raised unit, it falls to the ground and runs off; on a unit at ground level, it can freeze under the equipment and form a block of ice that interferes with its operation. We also avoid placing the unit above a walkway or stairs, where that water would freeze in the path.\u003c\/p\u003e\u003ch3\u003eRoof drip and wind\u003c\/h3\u003e\u003cp\u003eWater falling from a roof without a gutter, or from an overflowing gutter, freezes in layers on the unit and can damage the fins or the fan. We place the unit outside the roof's drip line, or plan protection when the location leaves no other option.\u003c\/p\u003e\u003cp\u003eWind matters too: a corner of the house exposed to prevailing winds collects snow and blows it onto the unit. A sheltered but not enclosed location is preferable. The unit must keep the clearance specified by the manufacturer all around it, with no hedge, fence or shed blocking the airflow.\u003c\/p\u003e\u003ch3\u003eNeighbours, windows and municipal rules\u003c\/h3\u003e\u003cp\u003eA heat pump that runs in winter also runs at night. We avoid placing it under a bedroom window, yours or your neighbour's, or near outdoor sitting areas. The municipalities and boroughs of \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e and \u003cstrong\u003eLongueuil\u003c\/strong\u003e often regulate the location of outdoor equipment: setbacks from property lines, front-yard restrictions, a visual screen in some cases. We check these rules for your address before setting the location.\u003c\/p\u003e\u003ch3\u003eThe 3.5-ton size and the ION series\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e3.5-ton\u003c\/strong\u003e size often serves a large house on two levels, a two-storey home with a finished basement or an extended semi-detached house on the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e. These examples are only a guide: insulation, windows and airtightness change the load, which we establish with a room-by-room \u003cstrong\u003eload calculation\u003c\/strong\u003e. Because the furnace's electric elements cover the coldest days, the heat pump is sized on cooling, which avoids the short cycles of an oversized unit.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eH4H5S42AKAAA\u003c\/strong\u003e unit is part of Arcoaire's ION series. For this size, the same \u003cstrong\u003eEVD4X42M17A\u003c\/strong\u003e coil goes with several series of outdoor units; the ratings of each pairing are confirmed before the quote.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eH4H5S42AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X42M17A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility.\u003c\/p\u003e\u003cp\u003eWe give them to you in writing with the quote. No rating is shown on this page, since there is no certificate for this exact pairing.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's LogisVert list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and a compatible thermostat decides when the heat pump heats alone and when the electric furnace takes over. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The outdoor unit goes on a stand, above the snow line, on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eInside: the 17.5 in. coil and the heat pump thermostat\u003c\/h3\u003e\u003cp\u003eIn the basement, the \u003cstrong\u003eEVD4X42M17A\u003c\/strong\u003e coil sits between the furnace's air outlet and the plenum. Its \u003cstrong\u003e17.5 in.\u003c\/strong\u003e format must match the width of the furnace cabinet; when needed, a sheet-metal transition joins them. The coil has its own \u003cstrong\u003econdensate drain\u003c\/strong\u003e: in summer, it removes humidity from the air in the house, and that water drains to the floor drain or a condensate pump.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eheat pump thermostat\u003c\/strong\u003e decides when the heat pump is enough and when backup is needed. In cool weather, the heat pump works alone; when the cold deepens, the thermostat brings in the furnace's electric elements as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e, and in deep cold, they take over. The auxiliary heat threshold is set at commissioning, according to the heat loss of the house and your comfort. The heat pump's air is less hot than the air from the electric elements, and its cycles are longer: this is normal.\u003c\/p\u003e\u003ch3\u003eThe line set route\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003erefrigerant line set\u003c\/strong\u003e connects the outdoor unit to the coil. It passes through the wall via an opening that we seal against air and water, then runs to the furnace by the most direct and tidy route possible. The suction line is insulated along its entire length to prevent condensation in summer and losses in winter. Outside, a line cover protects the line set from sun and impacts when the location calls for it.\u003c\/p\u003e\u003cp\u003eThe joints are brazed under nitrogen, then the line set undergoes a pressure test and a vacuum before the refrigerant charge.\u003c\/p\u003e\u003ch3\u003eElectrical: dedicated circuit and disconnect\u003c\/h3\u003e\u003cp\u003eThe outdoor unit is fed by a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e from the electrical panel. An outdoor disconnect, installed within sight of the unit, lets it be de-energized for maintenance. Before the quote, we check that the panel has the required space and capacity, taking into account the electric furnace that stays connected for backup; if a modification is needed, the quote spells it out. A control cable also connects the outdoor unit to the furnace and the thermostat.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC maintenance\u003c\/strong\u003e of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003eAfter a storm, clear the snow around and on top of the unit by hand or with a broom, without an ice pick or metal shovel that could damage the fins. Do not cover the unit for the winter: it must be able to run at all times.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE H4H5S ION | 3.5 Tons - 42,000 BTU (Coil EVD4X 17.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67799193288996,"sku":"H4H5S42AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_H4H5S_3_5_TONNES_42000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082528"},{"product_id":"thermopompe-centrale-add-on-arcoaire-n4h5s-performance-4-tonnes-48000-btu-serpentin-evd4x-24-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 4 Tons - 48,000 BTU (Coil EVD4X 24.5 in.) - R410A","description":"\u003ch2\u003eFour tons on the furnace, provided the calculation confirms it\u003c\/h2\u003e\u003cp\u003eThe ADD-ON system adds a heat pump to an existing electric furnace: a coil is installed on the furnace and the outdoor unit heats and cools through the same ducts. The furnace's electric elements are only used as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 4 Tons - 48,000 BTU (Coil EVD4X 24.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eN4H5S48AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X48M24A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eAt this size, the most common mistake is not a lack of capacity but too much of it. A \u003cstrong\u003e4-ton\u003c\/strong\u003e system suits a large house; installed in a house that does not need that much, it cools in bursts and leaves the air humid. This page explains how we decide whether this size is the right one for you.\u003c\/p\u003e\u003ch3\u003eWhich homes suit the 4-ton size\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e4-ton\u003c\/strong\u003e size is often found in a large two-level house with a finished basement, a heavily glazed house facing south or west, or an extended house whose \u003cstrong\u003educt\u003c\/strong\u003e system now serves more rooms than it did originally, in \u003cstrong\u003eLaval\u003c\/strong\u003e as on the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e. These examples are only a guide. A large, recent, well-insulated house may do with a smaller size, while a more modest house that is very sunny and leaky may need more.\u003c\/p\u003e\u003ch3\u003eWhy we size on cooling\u003c\/h3\u003e\u003cp\u003eIn an ADD-ON, the \u003cstrong\u003eelectric furnace\u003c\/strong\u003e stays in place, and its heating elements cover the coldest days. The heat pump therefore does not have to cover the winter peak on its own, and we size it on the house's cooling load. This choice protects what matters in summer: cycles long enough to remove humidity, a stable temperature and a compressor that does not start over and over.\u003c\/p\u003e\u003cp\u003eConversely, choosing the size based on heating would often push toward a unit that is too big for summer. The furnace's electric elements are there precisely to avoid that compromise.\u003c\/p\u003e\u003ch3\u003eWhat the load calculation measures\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eload calculation\u003c\/strong\u003e is done room by room. During the visit, we record:\u003c\/p\u003e\u003cul\u003e\u003cli\u003ethe area and orientation of the windows, their type and the shading they get;\u003c\/li\u003e\u003cli\u003ethe insulation of the walls, attic and basement, as it can be observed or documented;\u003c\/li\u003e\u003cli\u003ethe overall airtightness of the house and known sources of air leakage;\u003c\/li\u003e\u003cli\u003einternal heat gains: kitchen, appliances, number of occupants;\u003c\/li\u003e\u003cli\u003ethe layout of the rooms and how the duct system serves them.\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eThe result gives a cooling load and a heat loss for each room, then for the whole house. That is the basis on which we recommend a size, not the size of the old unit.\u003c\/p\u003e\u003ch3\u003eWhen the house falls between two sizes\u003c\/h3\u003e\u003cp\u003eSometimes the calculation places the house between two sizes. We then look at two things. First, the capacity of the duct system and the furnace blower: a larger size makes no sense if the ducts cannot carry the air it requires. Second, the house's summer profile: a humid house, or one that gets a lot of afternoon sun, does not behave like a shaded one. We present both options and the reason for our recommendation.\u003c\/p\u003e\u003ch3\u003eThe Performance series and the 24.5 in. coil\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eN4H5S48AKAAA\u003c\/strong\u003e unit belongs to Arcoaire's Performance series. At this size, the \u003cstrong\u003eEVD4X48M24A\u003c\/strong\u003e coil is shared by several series of outdoor units; what sets them apart is the outdoor unit, and the ratings of each pairing are confirmed before the quote.\u003c\/p\u003e\u003cp\u003eThe coil is a \u003cstrong\u003e24.5 in.\u003c\/strong\u003e format, designed for the wide cabinets often found on high-capacity furnaces. If your furnace's width differs, a sealed sheet-metal transition joins the two.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eN4H5S48AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X48M24A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility.\u003c\/p\u003e\u003cp\u003eWe confirm them for the size chosen after the load calculation: if your house calls for a neighbouring size, those are the ratings of that pairing you receive in writing. This page therefore shows no efficiency rating.\u003c\/p\u003e\u003ch3\u003eWinter, in two steps\u003c\/h3\u003e\u003cp\u003eIn cool weather, the heat pump heats alone. When the cold deepens and it can no longer hold the set point, the \u003cstrong\u003ethermostat\u003c\/strong\u003e brings in the furnace's electric elements as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e. The auxiliary heat threshold is set at commissioning based on the calculated heat loss and your preferences. During the outdoor unit's defrost, a plume of vapour forms and the furnace's elements may come on briefly so that the air at the registers stays warm.\u003c\/p\u003e\u003cp\u003eThe heat pump's air is less hot than the air from the electric elements and its cycles are longer; heat is spread more evenly through a large house.\u003c\/p\u003e\u003ch3\u003eDehumidification, one more reason to size correctly\u003c\/h3\u003e\u003cp\u003eIn summer, the coil cools the air and removes humidity, which drains through the condensate line. This dehumidification happens mostly during long cycles: at the start of a cycle, the coil must first cool down before it condenses water. An oversized unit reaches the set point before it has dried the air, and the house stays cool but clammy. A properly sized unit runs longer and leaves the house drier, which you clearly feel during heat waves in \u003cstrong\u003eMontreal\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's LogisVert list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and a compatible thermostat decides when the heat pump heats alone and when the electric furnace takes over. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The outdoor unit goes on a stand, above the snow line, on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eChecks specific to a large size\u003c\/h3\u003e\u003cp\u003eA 4-ton system asks more of the house than a small one. Before the quote, we check that the \u003cstrong\u003efurnace blower\u003c\/strong\u003e can deliver the airflow the coil requires, that the main ducts and the returns can carry it, and that the electrical panel has the capacity needed for the outdoor unit's \u003cstrong\u003ededicated circuit\u003c\/strong\u003e, on top of the electric furnace that stays in service for backup.\u003c\/p\u003e\u003cp\u003eThe outdoor unit, bulkier than a small size, goes on a sturdy stand above the snow line, out of roof drip and away from bedroom windows. The insulated \u003cstrong\u003erefrigerant line set\u003c\/strong\u003e is brazed under nitrogen, pressure-tested and evacuated, then the \u003cstrong\u003eR-410A\u003c\/strong\u003e charge is adjusted at commissioning, along with the airflow and the thermostat's auxiliary heat threshold.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC maintenance\u003c\/strong\u003e of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003eAt this size, the coil handles a large volume of air. A clean filter and a clean coil keep the capacity the calculation planned for; a clogged filter, on the other hand, gives up part of the benefit of careful sizing. The electric furnace keeps its usual maintenance: blower, heating elements and connections.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 4 Tons - 48,000 BTU (Coil EVD4X 24.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67799314039076,"sku":"N4H5S48AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_N4H5S_4_TONNES_48000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082539"},{"product_id":"thermopompe-centrale-add-on-arcoaire-hsh4-haut-de-gamme-4-tonnes-48000-btu-serpentin-evd4x-24-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE HSH4 Premium | 4 Tons - 48,000 BTU (Coil EVD4X 24.5 in.) - R410A","description":"\u003ch2\u003eA 24.5 in. coil that fits properly in the furnace room\u003c\/h2\u003e\u003cp\u003eThe ADD-ON system adds a heat pump to an existing electric furnace: a coil is installed on the furnace and the outdoor unit heats and cools through the same ducts. The furnace's electric elements are only used as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE HSH4 Premium | 4 Tons - 48,000 BTU (Coil EVD4X 24.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eHSH448GKA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X48M24A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eIn an ADD-ON, a good part of the work happens around the furnace, in a space that is often tight: a mechanical room in the basement, sometimes a furnace squeezed between a water heater and a finished wall. That is where the coil has to find its place, with its drain, its connections and the access needed for maintenance. This page details what we check in that room.\u003c\/p\u003e\u003ch3\u003eThe 24.5 in. coil and the furnace\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eEVD4X48M24A\u003c\/strong\u003e coil sits on the furnace's air outlet. Its \u003cstrong\u003e24.5 in.\u003c\/strong\u003e format matches the wide cabinets often found on high-capacity furnaces. When the widths match, the coil sits directly on the furnace; when they differ, we fabricate a sealed sheet-metal transition so that all of the air passes through the coil, not around it.\u003c\/p\u003e\u003cp\u003eMost basement furnaces blow upward, but some blow horizontally or downward. We check the orientation of yours and how the coil must connect to it before giving you the quote.\u003c\/p\u003e\u003ch3\u003eAvailable height and the plenum\u003c\/h3\u003e\u003cp\u003eThe coil fits between the furnace and the supply \u003cstrong\u003eplenum\u003c\/strong\u003e, the sheet-metal box from which the main ducts branch out. Clearance is therefore needed above the furnace. In a basement with a low ceiling, or when the plenum is enclosed in a finished ceiling, this height has to be worked out carefully: sometimes the plenum must be rebuilt, a duct takeoff moved or part of the ceiling opened. We note it during the visit and the quote spells it out, rather than finding out on installation day.\u003c\/p\u003e\u003ch3\u003eCondensate: drain, trap and pump\u003c\/h3\u003e\u003cp\u003eIn summer, the coil cools the air in the house and removes its humidity. At this size, the amount of water collected on a hot, humid day is significant. It flows through a \u003cstrong\u003econdensate drain\u003c\/strong\u003e fitted with a trap, on a steady slope to the floor drain. When no drain is within reach, a condensate pump lifts the water to a discharge point.\u003c\/p\u003e\u003cp\u003eIf the coil sits above a finished space or a floor that is sensitive to water, we add overflow protection, such as an auxiliary pan or a safety switch that stops cooling if the water no longer drains.\u003c\/p\u003e\u003ch3\u003eThe filter and furnace accessories\u003c\/h3\u003e\u003cp\u003eThe filter stays at the furnace inlet, upstream of the blower and the coil: it now protects both. Accessories already connected to the plenums, such as a humidifier or an air exchanger connection, stay in place in most cases. We do check their position, though, since the coil takes up part of the supply plenum and some accessories have to be moved to fit.\u003c\/p\u003e\u003ch3\u003eThe 4-ton size and the HSH4 series\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e4-ton\u003c\/strong\u003e size often serves a large two-level house, an extended two-storey home or a house with a finished basement and lots of windows, in \u003cstrong\u003eLongueuil\u003c\/strong\u003e or on the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e. These examples are only a guide. A room-by-room \u003cstrong\u003eload calculation\u003c\/strong\u003e establishes the cooling load; because the furnace's electric elements cover the deep cold, that load guides the choice of size. An oversized unit cools in short cycles and removes humidity poorly.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eHSH448GKA\u003c\/strong\u003e unit belongs to the HSH4 series, one of Arcoaire's Premium series. The coil is the same for the other series of this size; the outdoor unit makes the difference.\u003c\/p\u003e\u003cp\u003eEquipment of this size also needs a furnace blower that can keep up. We check that the existing blower can deliver the airflow the coil requires at full capacity; if it cannot, the quote says so clearly, before any decision.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eHSH448GKA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X48M24A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility.\u003c\/p\u003e\u003cp\u003eThe confirmed ratings are given to you in writing with the quote; this page shows none.\u003c\/p\u003e\u003ch3\u003eTwo heat sources, one thermostat\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eheat pump thermostat\u003c\/strong\u003e replaces the furnace thermostat. In cool weather, it hands heating to the heat pump; when the cold deepens and the heat pump is no longer enough, it brings in the furnace's electric elements as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e. The auxiliary heat threshold is set at commissioning, according to the heat loss of the house and your preferences.\u003c\/p\u003e\u003cp\u003eDuring the outdoor unit's defrost, the furnace's elements may come on briefly so that the air at the registers stays warm, and a plume of vapour comes out of the unit. The heat pump's air is less hot than the air from the electric elements; its cycles are longer and the house stays at a more even temperature.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's LogisVert list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and a compatible thermostat decides when the heat pump heats alone and when the electric furnace takes over. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The outdoor unit goes on a stand, above the snow line, on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eOutside: the unit, the line set and the electrical work\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eHSH448GKA\u003c\/strong\u003e outdoor unit goes on a sturdy stand above the snow line, out of roof drip and away from bedroom windows, in compliance with municipal rules. The insulated \u003cstrong\u003erefrigerant line set\u003c\/strong\u003e passes through the wall via a sealed opening and runs to the coil; its joints are brazed under nitrogen, then it undergoes a pressure test and a vacuum before the \u003cstrong\u003eR-410A\u003c\/strong\u003e charge. The electrical work includes a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e, an outdoor disconnect and control wiring between the thermostat, the furnace and the unit.\u003c\/p\u003e\u003cp\u003eAt commissioning, we adjust the charge, the blower airflow and the thermostat's auxiliary heat threshold, then check the condensate drain flow and, where applicable, that the pump starts.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC maintenance\u003c\/strong\u003e of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003eKeep access to the coil and drain clear in the mechanical room: the annual maintenance depends on it. If a condensate pump is installed, check from time to time during the summer that it starts and that its tubing is neither kinked nor clogged. The electric furnace keeps its usual maintenance, centred on the blower, the heating elements and their connections.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE HSH4 Premium | 4 Tons - 48,000 BTU (Coil EVD4X 24.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67799314596132,"sku":"HSH448GKA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_HSH4_4_TONNES_48000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082539"},{"product_id":"thermopompe-centrale-add-on-arcoaire-r4h5s-economique-4-tonnes-48000-btu-serpentin-evd4x-24-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 4 Tons - 48,000 BTU (Coil EVD4X 24.5 in.) - R410A","description":"\u003ch2\u003eThe heat pump heats first, your electric furnace backs it up\u003c\/h2\u003e\u003cp\u003eThe ADD-ON system adds a heat pump to an existing electric furnace: a coil is installed on the furnace and the outdoor unit heats and cools through the same ducts. The furnace's electric elements are only used as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 4 Tons - 48,000 BTU (Coil EVD4X 24.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eR4H5S48AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X48M24A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eThe principle of an ADD-ON does not change from one house to the next: the heat pump heats as long as it is enough, the electric furnace's elements take over when the cold demands it, and in summer the heat pump cools the whole house. What changes is the furnace in place: its age, its blower, its control and the electrical panel that feeds it. Here is what each of these points calls for.\u003c\/p\u003e\u003ch3\u003eWhat is inside an electric furnace\u003c\/h3\u003e\u003cp\u003eAn \u003cstrong\u003eelectric furnace\u003c\/strong\u003e is a simple piece of equipment: a blower pushes the house air across \u003cstrong\u003eheating elements\u003c\/strong\u003e, resistances similar to those of an electric baseboard, and the heated air goes out into the \u003cstrong\u003educts\u003c\/strong\u003e. The elements are grouped, and the furnace control turns them on one after the other according to demand, rather than calling for all the power at once.\u003c\/p\u003e\u003cp\u003eIn an ADD-ON, none of this disappears. The coil is added on the air outlet, the furnace blower pushes air through it summer and winter, and the elements stay ready to serve. A heat pump moves heat rather than producing it: it captures heat from the outdoor air and carries it to the coil. As long as it is enough, the elements stay idle.\u003c\/p\u003e\u003ch3\u003eWho heats, and when\u003c\/h3\u003e\u003cp\u003eIn mild and cool weather, the heat pump heats alone. When the cold deepens and it can no longer hold the set point, the thermostat brings in the furnace's elements as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e. In deep cold, they carry most of the heating. During the outdoor unit's defrost cycles, they may also come on briefly so that the air at the registers stays warm.\u003c\/p\u003e\u003cp\u003eThis sharing happens without any action on your part: you set a temperature, and the thermostat chooses the source. An \u003cstrong\u003eemergency heat\u003c\/strong\u003e mode also lets the elements heat on their own if the outdoor unit has to be shut down for a repair; the house stays heated in the meantime.\u003c\/p\u003e\u003ch3\u003eThe electrical panel and the service entrance\u003c\/h3\u003e\u003cp\u003eHere, both pieces of equipment are electric. The outdoor unit adds a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e to the panel that already feeds the furnace and its elements. Before the quote, we check the capacity of the electrical service and the space available in the panel; if a modification is needed, the quote specifies it.\u003c\/p\u003e\u003cp\u003eWe also look at the condition of the wiring and the breaker of the furnace itself. Connections that have overheated or tired original wiring are easier to correct during the project than afterwards, and our electrical licence lets us handle them as part of the same project as the heat pump.\u003c\/p\u003e\u003ch3\u003eThe thermostat and the auxiliary heat setting\u003c\/h3\u003e\u003cp\u003eThe thermostat links the two pieces of equipment. It is a \u003cstrong\u003eheat pump thermostat\u003c\/strong\u003e, sometimes connected to an outdoor sensor, which calls on the heat pump first, then on the elements when the house needs more. The point at which auxiliary heat comes in is set according to the heat loss of the house and your comfort; we set it at commissioning and show you how to change it.\u003c\/p\u003e\u003cp\u003eAuxiliary heat that comes in too early makes the elements work when the heat pump would have been enough; auxiliary heat that comes in too late lets the house cool down before the elements help. The setting looks for the right balance for your home, and it can be adjusted after the first cold spells if the house calls for it.\u003c\/p\u003e\u003cp\u003eThe air delivered by the heat pump is less hot than the air from the electric elements, the cycles are longer, and a plume of vapour comes out of the outdoor unit during defrost. This is normal operation.\u003c\/p\u003e\u003ch3\u003eThe 4-ton size and the Economy series\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e4-ton\u003c\/strong\u003e size often serves a large family home: a two-storey house with a finished basement in \u003cstrong\u003eLaval\u003c\/strong\u003e, an extended two-level house, a heavily glazed house. These examples are only a guide; a room-by-room \u003cstrong\u003eload calculation\u003c\/strong\u003e settles it. We size the heat pump on the cooling load, since the furnace's elements cover the deep cold, which avoids the short cycles of an oversized unit.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eEVD4X48M24A\u003c\/strong\u003e coil is a \u003cstrong\u003e24.5 in.\u003c\/strong\u003e format and must match the width of the furnace cabinet, with a sheet-metal transition when needed. The \u003cstrong\u003eR4H5S48AKAAA\u003c\/strong\u003e unit belongs to Arcoaire's Economy series; the same coil goes with the other series of this size, and it is the ratings of the pairing, confirmed before the quote, that let you compare them.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eR4H5S48AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X48M24A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility.\u003c\/p\u003e\u003cp\u003eTogether with the load calculation, these ratings are also used to set the point at which the thermostat adds the furnace's elements. You receive them in writing with the quote; this page shows none.\u003c\/p\u003e\u003ch3\u003eIn summer, the furnace only lends its blower\u003c\/h3\u003e\u003cp\u003eIn summer, the furnace's elements stay off and only its blower works. The heat pump cools the whole house through the existing \u003cstrong\u003educts\u003c\/strong\u003e, and the coil removes humidity from the air, which drains through the condensate line to the floor drain or a pump. For a house heated by an electric furnace alone, without central air, this is often the most noticeable change of the project.\u003c\/p\u003e\u003cp\u003eThe furnace blower must then deliver the airflow the coil requires. We check its capacity and set its cooling speed at commissioning.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's LogisVert list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and a compatible thermostat decides when the heat pump heats alone and when the electric furnace takes over. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The outdoor unit goes on a stand, above the snow line, on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe insulated \u003cstrong\u003erefrigerant line set\u003c\/strong\u003e connects the outdoor unit to the coil; its joints are brazed under nitrogen, then it undergoes a pressure test and a vacuum before the \u003cstrong\u003eR-410A\u003c\/strong\u003e charge. The outdoor unit is placed out of roof drip and away from bedroom windows, according to your municipality's rules, with an outdoor disconnect within sight.\u003c\/p\u003e\u003ch3\u003eMaintenance: two pieces of equipment, two schedules\u003c\/h3\u003e\u003cp\u003eReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC maintenance\u003c\/strong\u003e of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003eThe electric furnace keeps its own schedule: inspection of the blower, the heating elements and the tightness of their connections. Plan both maintenance visits before the heating season.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 4 Tons - 48,000 BTU (Coil EVD4X 24.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67799315710244,"sku":"R4H5S48AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_R4H5S_4_TONNES_48000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082541"},{"product_id":"thermopompe-centrale-add-on-arcoaire-hsh6-haut-de-gamme-4-tonnes-48000-btu-serpentin-evd4x-24-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE HSH6 Premium | 4 Tons - 48,000 BTU (Coil EVD4X 24.5 in.) - R410A","description":"\u003ch2\u003eA cool, dry summer throughout the house, through the existing ducts\u003c\/h2\u003e\u003cp\u003eThe ADD-ON system adds a heat pump to an existing electric furnace: a coil is installed on the furnace and the outdoor unit heats and cools through the same ducts. The furnace's electric elements are only used as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE HSH6 Premium | 4 Tons - 48,000 BTU (Coil EVD4X 24.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eHSH648GKA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X48M24A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eFor many homeowners, the project starts in summer: a house that heats well in winter thanks to its electric furnace, but where the bedrooms become hard to bear during heat waves. This pairing adds central air conditioning to the furnace, and the same heat pump then heats in cool weather. This page focuses on summer, the season in which this system changes daily life the most.\u003c\/p\u003e\u003ch3\u003eOne outdoor unit for every room\u003c\/h3\u003e\u003cp\u003eWith an ADD-ON, cool air flows through the \u003cstrong\u003educts\u003c\/strong\u003e and registers already in place. No more window units that block the view and let hot air in around the frame: the compressor and the outdoor fan are outside, and only the furnace blower runs inside the house. Every room served by the duct system is cooled, including those where a wall unit would be hard to place.\u003c\/p\u003e\u003cp\u003eThe air of the whole house also passes through the furnace filter on every cycle. Central air conditioning therefore filters the air all summer long: a good-quality filter, replaced on time, traps part of the dust and pollen that come in through the windows in spring.\u003c\/p\u003e\u003ch3\u003eHumidity, half of the discomfort\u003c\/h3\u003e\u003cp\u003eA humid day feels hotter than a dry day at the same temperature. In cooling mode, the \u003cstrong\u003eEVD4X48M24A\u003c\/strong\u003e coil cools the air below its dew point: humidity condenses on its fins and flows out through the \u003cstrong\u003econdensate drain\u003c\/strong\u003e. The house becomes drier, and a moderate set point is then enough to make it comfortable.\u003c\/p\u003e\u003cp\u003eThis dehumidification requires fairly long cycles. That is why we size the heat pump on the house's actual cooling load, and not as big as possible: an oversized unit cools quickly, shuts off and leaves the air clammy. Since the furnace's electric elements cover the deep cold, nothing forces us to oversize the unit for winter.\u003c\/p\u003e\u003ch3\u003eThe upstairs bedrooms\u003c\/h3\u003e\u003cp\u003eIn a two-level house, the upper floor concentrates the heat: the roof heats up in the sun, warm air rises, and the bedrooms are often the rooms farthest from the furnace. Three measures help keep them comfortable. Balancing the dampers, which sends more air upstairs in summer. A return upstairs, which brings warm air back to the coil instead of letting it build up. And blinds or curtains closed on windows exposed to the afternoon sun.\u003c\/p\u003e\u003cp\u003eDuring the visit, we look at the upstairs duct runs and the returns. If a correction would help, the quote proposes it.\u003c\/p\u003e\u003ch3\u003eThe basement and the main floor\u003c\/h3\u003e\u003cp\u003eConversely, the basement stays naturally cool in summer, and it can even become cold and damp if it receives as much air as in winter. Many duct systems have dampers that are adjusted by season: more open downstairs in winter, more open upstairs in summer. We show you which ones to adjust and in which direction, so that the main floor and the basement do not take all of the cool air.\u003c\/p\u003e\u003ch3\u003eDuring heat waves\u003c\/h3\u003e\u003cp\u003eAn air conditioning system is sized for the region's usual summer conditions, not for the hottest day of the decade. During a heat wave in \u003cstrong\u003eMontreal\u003c\/strong\u003e, it is normal for the heat pump to run almost non-stop in the afternoon. A few habits help: keep a steady set point rather than lowering it sharply when you get home, close the blinds on the sunny side, and let the system run from the morning rather than starting it when the house is already hot.\u003c\/p\u003e\u003ch3\u003eThe 4-ton size and the HSH6 series\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e4-ton\u003c\/strong\u003e size often suits a large two-level house, a heavily glazed two-storey home facing west, or an extended house on the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e. These examples are only a guide: insulation, shading and airtightness change the load, which we establish with a room-by-room \u003cstrong\u003eload calculation\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eHSH648GKA\u003c\/strong\u003e unit belongs to the HSH6 series, one of Arcoaire's Premium series. The \u003cstrong\u003eEVD4X48M24A\u003c\/strong\u003e coil, a \u003cstrong\u003e24.5 in.\u003c\/strong\u003e format, is the same as for the other series of this size; it must match the width of the furnace cabinet, with a sheet-metal transition when needed.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eHSH648GKA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X48M24A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility.\u003c\/p\u003e\u003cp\u003eThe pairing's cooling and heating ratings are given to you in writing with the quote; this page shows none.\u003c\/p\u003e\u003ch3\u003eWinter, alongside the electric furnace\u003c\/h3\u003e\u003cp\u003eIn cool weather, the heat pump heats alone; when the cold deepens and it is no longer enough, the \u003cstrong\u003ethermostat\u003c\/strong\u003e brings in the elements of the \u003cstrong\u003eelectric furnace\u003c\/strong\u003e as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e. The auxiliary heat threshold is set at commissioning according to the house and your comfort. During defrost, a plume of vapour comes out of the outdoor unit and the furnace's elements may come on briefly. The heat pump's air is less hot than the air from the electric elements, and its cycles are longer: this is normal.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's LogisVert list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and a compatible thermostat decides when the heat pump heats alone and when the electric furnace takes over. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The outdoor unit goes on a stand, above the snow line, on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eWhat commissioning sets for summer\u003c\/h3\u003e\u003cul\u003e\u003cli\u003ethe \u003cstrong\u003eR-410A\u003c\/strong\u003e charge, after the nitrogen pressure test and the vacuum on the \u003cstrong\u003erefrigerant line set\u003c\/strong\u003e;\u003c\/li\u003e\u003cli\u003ethe furnace blower speed in cooling mode, for airflow that both cools and dries;\u003c\/li\u003e\u003cli\u003ethe condensate drain flow and, where applicable, the operation of the pump;\u003c\/li\u003e\u003cli\u003ethe thermostat's cooling settings;\u003c\/li\u003e\u003cli\u003ethe position of the dampers for the warm season.\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eThe outdoor unit, on its stand, is placed away from bedroom windows and roof drip, according to your municipality's rules, with an outdoor disconnect within sight.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC maintenance\u003c\/strong\u003e of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003eBefore summer, make sure nothing crowds the outdoor unit: tall grass, branches, patio furniture. A clean outdoor coil rejects heat better, and the house benefits on hot days.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE HSH6 Premium | 4 Tons - 48,000 BTU (Coil EVD4X 24.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67799316300068,"sku":"HSH648GKA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_HSH6_4_TONNES_48000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082539"},{"product_id":"thermopompe-centrale-add-on-arcoaire-h4h5s-ion-4-tonnes-48000-btu-serpentin-evd4x-24-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE H4H5S ION | 4 Tons - 48,000 BTU (Coil EVD4X 24.5 in.) - R410A","description":"\u003ch2\u003eFrom the first visit to commissioning, a 4-ton ADD-ON step by step\u003c\/h2\u003e\u003cp\u003eThe ADD-ON system adds a heat pump to an existing electric furnace: a coil is installed on the furnace and the outdoor unit heats and cools through the same ducts. The furnace's electric elements are only used as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE H4H5S ION | 4 Tons - 48,000 BTU (Coil EVD4X 24.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eH4H5S48AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X48M24A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eAdding a heat pump to an electric furnace is a well-defined project: the furnace and the \u003cstrong\u003educts\u003c\/strong\u003e stay, and the work covers the coil, the outdoor unit, the line set, the electrical work and the thermostat. Each step still has to be done in the right order. Here is how a project unfolds with us, from the first visit to the moment the system runs on its own.\u003c\/p\u003e\u003ch3\u003eBefore the visit: what helps us\u003c\/h3\u003e\u003cp\u003eA few details, if you have them at hand, make the visit more efficient:\u003c\/p\u003e\u003cul\u003e\u003cli\u003ea photo of the furnace's rating plate, which shows its brand and model;\u003c\/li\u003e\u003cli\u003eits approximate age and the invoices from its last maintenance visits;\u003c\/li\u003e\u003cli\u003ea photo of the electrical panel with the door open;\u003c\/li\u003e\u003cli\u003ethe rooms that bother you: hot bedrooms in summer, cold rooms in winter, a damp basement;\u003c\/li\u003e\u003cli\u003ethe house plans, if any exist.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eThe home visit\u003c\/h3\u003e\u003cp\u003eDuring the visit, we look at the house as a system. In the basement: the condition of the \u003cstrong\u003eelectric furnace\u003c\/strong\u003e and its heating elements, the width of its cabinet, its blower, the clearance above it and the plenum. In the house: the registers, the returns and how the duct system serves each level. Outside: the possible location of the outdoor unit, the snow line, roof drip, neighbouring windows. At the panel: the space and capacity available for a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e, on top of what the furnace already draws.\u003c\/p\u003e\u003cp\u003eWe also look at the current thermostat and the cable that connects it to the furnace. A heat pump thermostat that also manages auxiliary heat often needs more conductors than an ordinary furnace thermostat; if the existing cable is not enough, we plan to run a new one. And if the furnace shows signs of advanced wear, we tell you during the visit: an ADD-ON only makes sense on a reliable furnace.\u003c\/p\u003e\u003ch3\u003eThe load calculation and choosing the size\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eload calculation\u003c\/strong\u003e is done room by room: windows, orientation, insulation, airtightness, occupants. In an ADD-ON, the furnace's electric elements cover the deep cold, so we size the heat pump on the cooling load. An oversized unit cools in short cycles and removes humidity poorly; an undersized unit struggles on heat-wave afternoons.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003e4-ton\u003c\/strong\u003e size often suits a large two-level house with a finished basement, a heavily glazed house or an extended house in \u003cstrong\u003eLaval\u003c\/strong\u003e or on the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e. These examples are only a guide: the calculation decides. The \u003cstrong\u003eH4H5S48AKAAA\u003c\/strong\u003e unit is part of Arcoaire's ION series, and the \u003cstrong\u003eEVD4X48M24A\u003c\/strong\u003e coil, a \u003cstrong\u003e24.5 in.\u003c\/strong\u003e format, is shared by the series of this size.\u003c\/p\u003e\u003ch3\u003eThe written quote\u003c\/h3\u003e\u003cp\u003eThe quote specifies the chosen equipment, the model numbers of the outdoor unit and the coil, the related work planned and the confirmed ratings of the pairing. If the plenum must be rebuilt, if a return is recommended or if the panel needs a modification, it is written down in black and white before you sign. You know exactly what will be done, and why. If the grant matters to you, we can also present an eligible option of comparable size alongside this pairing.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eH4H5S48AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X48M24A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility.\u003c\/p\u003e\u003cp\u003eThat is why no rating appears on this page: the confirmed ratings are in the quote.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's LogisVert list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and a compatible thermostat decides when the heat pump heats alone and when the electric furnace takes over. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The outdoor unit goes on a stand, above the snow line, on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eInstallation day\u003c\/h3\u003e\u003col\u003e\u003cli\u003e\u003cstrong\u003eOld equipment\u003c\/strong\u003e: if there is an old air conditioner, its refrigerant is recovered before the unit and its coil are removed.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eCoil\u003c\/strong\u003e: installation of the 24.5 in. coil on the furnace's air outlet, with a sealed sheet-metal transition if the widths differ, then adjustment of the plenum.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eDrain\u003c\/strong\u003e: connection of the condensate drain, with a trap, to the floor drain or a pump.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eOutdoor unit\u003c\/strong\u003e: installation of the stand and the unit, out of roof drip and away from bedroom windows.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eLine set\u003c\/strong\u003e: routing of the insulated line set through a sealed opening, joints brazed under nitrogen.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eElectrical\u003c\/strong\u003e: dedicated circuit, outdoor disconnect and control wiring between the unit, the furnace and the thermostat.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eThermostat\u003c\/strong\u003e: installation of the \u003cstrong\u003eheat pump thermostat\u003c\/strong\u003e, which also controls auxiliary heat, and, where applicable, its outdoor sensor.\u003c\/li\u003e\u003c\/ol\u003e\u003ch3\u003eCommissioning\u003c\/h3\u003e\u003cp\u003eCommissioning checks that everything just installed works together. The \u003cstrong\u003erefrigerant line set\u003c\/strong\u003e undergoes a nitrogen pressure test, then a vacuum; the \u003cstrong\u003eR-410A\u003c\/strong\u003e charge is then adjusted according to the manufacturer's instructions. We set the furnace blower speed for cooling and heat pump heating, then the point at which the thermostat brings in the furnace's electric elements, according to the house and your preferences.\u003c\/p\u003e\u003cp\u003eEach mode is then tested: cooling, heat pump heating, auxiliary heat from the furnace's elements, emergency heat, and the changeover from one to the other. Finally, we check the condensate drain flow.\u003c\/p\u003e\u003ch3\u003eAfter the installation: what you will notice\u003c\/h3\u003e\u003cp\u003eIn winter, the heat pump heats alone in cool weather, and the furnace's electric elements add auxiliary heat when the cold deepens. The heat pump's air is less hot than the air from the elements and its cycles are longer; the house stays at a more even temperature. During defrost, a plume of white vapour comes out of the outdoor unit and the furnace's elements may come on briefly. In summer, the same unit cools and dries the whole house through the ducts.\u003c\/p\u003e\u003cp\u003eWe show you how to read the thermostat, change the auxiliary heat threshold and replace the filter. Keep the quote and the invoice: they describe the installed equipment and will be useful during maintenance visits.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC maintenance\u003c\/strong\u003e of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003eThe electric furnace keeps its usual maintenance: blower, heating elements and connections. Its elements run fewer hours than before, but they must stay ready for the very cold days.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE H4H5S ION | 4 Tons - 48,000 BTU (Coil EVD4X 24.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67799327506724,"sku":"H4H5S48AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_H4H5S_4_TONNES_48000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082528"},{"product_id":"thermopompe-centrale-add-on-arcoaire-h4h7t-ion-2-stages-4-tonnes-48000-btu-serpentin-evd4x-24-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE H4H7T ION 2 stages | 4 Tons - 48,000 BTU (Coil EVD4X 24.5 in.) - R410A","description":"\u003ch2\u003eA two-stage ADD-ON, with certified ratings for this pairing\u003c\/h2\u003e\u003cp\u003eThe ADD-ON system adds a heat pump to an existing electric furnace: a coil is installed on the furnace and the outdoor unit heats and cools through the same ducts. The furnace's electric elements are only used as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE H4H7T ION 2 stages | 4 Tons - 48,000 BTU (Coil EVD4X 24.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eH4H7T48AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X48M24A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eIts ratings are \u003cstrong\u003e14.5 SEER2\u003c\/strong\u003e, \u003cstrong\u003e10.5 EER2\u003c\/strong\u003e and \u003cstrong\u003e7.5 HSPF2\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThis pairing is listed with its ratings in the AHRI certification directory. You therefore know, even before the visit, what the system delivers in winter and summer under standardized test conditions. This page explains those figures and what they mean for the electric furnace that stays in place.\u003c\/p\u003e\u003ch3\u003eWhat the certificate shows\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eAt -8 °C\u003c\/strong\u003e (17 °F): \u003cstrong\u003e30,200 BTU\/h\u003c\/strong\u003e.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eAt -15 °C\u003c\/strong\u003e (5 °F): \u003cstrong\u003e24,200 BTU\/h\u003c\/strong\u003e, with a \u003cstrong\u003eCOP of 2.18\u003c\/strong\u003e.\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eThe two points are measured separately; we report each one as published. These figures come from certificate \u003cstrong\u003eAHRI 213675361\u003c\/strong\u003e, as published in the AHRI certification directory.\u003c\/p\u003e\u003ch3\u003eThe ratings in plain words\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSEER2\u003c\/strong\u003e at 14.5 measures cooling efficiency over a typical summer: the higher it is, the less the cooling uses for the same comfort. \u003cstrong\u003eEER2\u003c\/strong\u003e at 10.5 measures that efficiency at full load, on a hot day. \u003cstrong\u003eHSPF2\u003c\/strong\u003e at 7.5 measures heating efficiency over a full season.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eCOP\u003c\/strong\u003e gives the efficiency at a specific temperature. An electric baseboard has a COP of 1: it delivers exactly the energy it consumes. At -15 °C, this system shows a COP of 2.18: at that test point, it delivers a little more than twice the heat it consumes in electricity.\u003c\/p\u003e\u003cp\u003eThese ratings are established under standardized test conditions. In your home, the condition of the ducts, the airflow set on the furnace blower and maintenance affect what the system actually delivers; that is why we check the duct system before the quote and set the airflow at commissioning.\u003c\/p\u003e\u003ch3\u003eWhat the two winter points mean for the electric furnace\u003c\/h3\u003e\u003cp\u003eThe system's nominal size is \u003cstrong\u003e48,000 BTU\u003c\/strong\u003e. At -8 °C, its published heating capacity represents about 63% of that size; at -15 °C, about 50%. Meanwhile, the house's heat loss rises as the outdoor air gets colder. There is therefore a temperature, specific to each house, below which the heat pump is no longer enough: the \u003cstrong\u003ebalance point\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eAbove that point, the heat pump heats alone. Below it, the \u003cstrong\u003ethermostat\u003c\/strong\u003e brings in the electric elements of the \u003cstrong\u003efurnace\u003c\/strong\u003e as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e, to supply what the heat pump no longer provides. We estimate that point from the house's load calculation and the certified capacities, then set the auxiliary heat threshold accordingly. The certificate's figures are therefore used directly to set up your system.\u003c\/p\u003e\u003ch3\u003eA two-stage compressor\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eH4H7T48AKAAA\u003c\/strong\u003e unit belongs to Arcoaire's ION 2 stages series and uses a \u003cstrong\u003etwo-stage compressor\u003c\/strong\u003e: a reduced stage when demand is low, a full stage when the house needs all of the capacity. In mild weather, the reduced stage lengthens cycles and keeps the temperature more even; when cold or heat intensifies, the full stage takes over. In an ADD-ON, the furnace's electric elements add a third level of response for the coldest days.\u003c\/p\u003e\u003ch3\u003eThe time-delay relay (TDR)\u003c\/h3\u003e\u003cp\u003eThese ratings are certified with the manufacturer's \u003cstrong\u003etime-delay relay (TDR)\u003c\/strong\u003e; we install it with the coil. This relay briefly keeps the blower running after the compressor stops, to make use of the cooling left in the coil. Without it, the installed system would not quite match the certified configuration.\u003c\/p\u003e\u003ch3\u003eThe 4-ton size\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e4-ton\u003c\/strong\u003e size is often found in a large two-level house with a finished basement, a heavily glazed house or an extended house in \u003cstrong\u003eLongueuil\u003c\/strong\u003e or on the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e. These examples are only a guide: insulation, orientation and airtightness change the load, which we establish with a room-by-room \u003cstrong\u003eload calculation\u003c\/strong\u003e. In an ADD-ON, we size the heat pump on cooling; the furnace's electric elements cover the deep cold.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eEVD4X48M24A\u003c\/strong\u003e coil is a \u003cstrong\u003e24.5 in.\u003c\/strong\u003e format; it must match the width of the furnace cabinet, with a sealed sheet-metal transition when needed.\u003c\/p\u003e\u003ch3\u003eThe thermostat and electric backup, day to day\u003c\/h3\u003e\u003cp\u003eAt each call for heat, the thermostat decides whether to add backup from the electric elements, often with the help of an outdoor sensor. The auxiliary heat threshold takes into account the balance point and your preferences; we set it at commissioning and show you how to change it.\u003c\/p\u003e\u003cp\u003eThe heat pump's air is less hot than the air from the electric elements and its cycles are longer: this is normal. During defrost, a plume of vapour comes out of the outdoor unit, and the furnace's elements may come on briefly so that the air at the registers stays warm.\u003c\/p\u003e\u003ch3\u003eSummer: cooling and dehumidification\u003c\/h3\u003e\u003cp\u003eIn summer, the coil cools the air and removes humidity, which drains through the condensate line to the floor drain or a pump. The reduced stage of the two-stage compressor suits hot, humid days well: it runs for a long time at low capacity, which gives the coil time to dry the air. The whole house is cooled through the existing \u003cstrong\u003educts\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's LogisVert list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and a compatible thermostat decides when the heat pump heats alone and when the electric furnace takes over. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The outdoor unit goes on a stand, above the snow line, on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eThe steps on site\u003c\/h3\u003e\u003cp\u003eOn site, we install the coil and the time-delay relay on the furnace, connect the condensate drain, set the outdoor unit on its stand out of roof drip and away from bedroom windows, then route the insulated \u003cstrong\u003erefrigerant line set\u003c\/strong\u003e to the coil. Next come the dedicated circuit, the outdoor disconnect, the control wiring and the heat pump thermostat.\u003c\/p\u003e\u003cp\u003eAt commissioning: nitrogen pressure test, vacuum, adjustment of the \u003cstrong\u003eR-410A\u003c\/strong\u003e charge, the airflow and the auxiliary heat threshold, then a test of each mode, from cooling to auxiliary heat from the furnace's elements.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC maintenance\u003c\/strong\u003e of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003eA dirty coil or a clogged filter moves the system away from the conditions under which its ratings were measured. Maintenance is precisely what keeps the certified efficiency in your home. The electric furnace keeps its usual maintenance, centred on the blower, the heating elements and their connections.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE H4H7T ION 2 stages | 4 Tons - 48,000 BTU (Coil EVD4X 24.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67799327539492,"sku":"H4H7T48AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_H4H7T_4_TONNES_48000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082528"},{"product_id":"thermopompe-centrale-add-on-arcoaire-n4h5s-performance-5-tonnes-60000-btu-serpentin-evd4x-24-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A","description":"\u003ch2\u003eThe largest residential size calls for an installation to match\u003c\/h2\u003e\u003cp\u003eThe ADD-ON system adds a heat pump to an existing electric furnace: a coil is installed on the furnace and the outdoor unit heats and cools through the same ducts. The furnace's electric elements are only used as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eN4H5S60AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X60M24A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003e5-ton\u003c\/strong\u003e size is the largest common residential size. At this size, everything around the equipment matters as much as the equipment itself: the electrical service, the furnace blower, the diameter of the line set, the space available outside. This page details those points, which we check before giving you a quote.\u003c\/p\u003e\u003ch3\u003eFive tons: which homes\u003c\/h3\u003e\u003cp\u003eThis size suits homes with a high cooling load: a very large two-level house with a finished basement, a heavily glazed house facing south or west, an extended house whose duct system serves many rooms, in \u003cstrong\u003eLaval\u003c\/strong\u003e, on the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e or on the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e. These examples are only a guide. Insulation, sun exposure and airtightness change the actual load considerably.\u003c\/p\u003e\u003cp\u003eThe room-by-room \u003cstrong\u003eload calculation\u003c\/strong\u003e often ends up at a smaller size than expected, especially in a recent, well-insulated house. In that case, we tell you. In an ADD-ON, the furnace's electric elements cover the deep cold; the heat pump is sized on cooling, and an oversized unit cools in short cycles and dries the air poorly.\u003c\/p\u003e\u003ch3\u003eThe home's electrical capacity\u003c\/h3\u003e\u003cp\u003eAn outdoor unit of this size is a significant electrical load. It needs a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e with a suitable breaker, free space in the panel and an electrical service able to carry it on top of the home's other appliances. Because the furnace itself is electric and stays connected for backup, this is often the first point to check, especially in an older house.\u003c\/p\u003e\u003cp\u003eDuring the visit, we look at the panel, the electrical service and the loads already connected, starting with the electric furnace. If a panel modification or a service upgrade is needed, the quote spells it out. An outdoor disconnect, within sight of the unit, completes the connection.\u003c\/p\u003e\u003ch3\u003eA larger outdoor unit\u003c\/h3\u003e\u003cp\u003eThe outdoor unit of a 5-ton system is bulkier and heavier than that of a small size. It needs a sturdy stand, designed for its weight, that keeps it above the snow line. It also needs an access path to bring it to its location, and enough space around it for air to flow freely, according to the manufacturer's clearances. We level it on its stand and secure it so that it stays stable under wind and the weight of snow.\u003c\/p\u003e\u003cp\u003eLike any heat pump that works in winter, it is placed out of roof drip, away from bedroom windows, yours or your neighbour's, and in compliance with your municipality's rules on outdoor equipment.\u003c\/p\u003e\u003ch3\u003eThe line set of a large system\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003erefrigerant line set\u003c\/strong\u003e must have the diameter this pairing requires. An existing line set, installed years ago for a smaller air conditioner, is often too narrow for a 5-ton system; we then replace it. The suction line is insulated along its entire length to prevent condensation in summer and losses in winter. The line set passes through the wall via a sealed opening, its joints are brazed under nitrogen, then it undergoes a pressure test and a vacuum before the \u003cstrong\u003eR-410A\u003c\/strong\u003e charge.\u003c\/p\u003e\u003ch3\u003eThe furnace blower has to keep up\u003c\/h3\u003e\u003cp\u003eIn an ADD-ON, the \u003cstrong\u003efurnace blower\u003c\/strong\u003e moves the air through the coil. At this size, it must deliver a large airflow. Not every furnace can: its documentation states the maximum cooling capacity planned for its blower. We check this point on your model before the quote.\u003c\/p\u003e\u003cp\u003eIf the blower is not enough, the coil is starved of air: capacity drops, the coil may freeze in cooling mode and the house stays humid. In that case, it is better to choose a smaller size or consider another type of system, and we tell you so clearly.\u003c\/p\u003e\u003ch3\u003eThe 24.5 in. coil and the Performance series\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eEVD4X60M24A\u003c\/strong\u003e coil is a \u003cstrong\u003e24.5 in.\u003c\/strong\u003e format, designed for the wide cabinets of high-capacity furnaces. If your furnace's width differs, a sealed sheet-metal transition joins them, and the plenum is adjusted to accommodate the coil. The condensate drain, fitted with a trap, runs to the floor drain or a pump.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eN4H5S60AKAAA\u003c\/strong\u003e unit belongs to Arcoaire's Performance series. The same coil goes with the other series of this size; the outdoor unit is what sets them apart.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eN4H5S60AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X60M24A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility.\u003c\/p\u003e\u003cp\u003eYou receive these ratings in writing with the quote; this page shows none.\u003c\/p\u003e\u003ch3\u003eHeating and cooling, day to day\u003c\/h3\u003e\u003cp\u003eIn cool weather, the heat pump heats alone. When the cold deepens and it is no longer enough, the \u003cstrong\u003ethermostat\u003c\/strong\u003e brings in the furnace's electric elements as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e. The auxiliary heat threshold is set at commissioning according to the heat loss of the house and your preferences. The heat pump's air is less hot than the air from the electric elements, its cycles are longer, and a plume of vapour comes out of the outdoor unit during defrost: this is normal.\u003c\/p\u003e\u003cp\u003eIn summer, the same unit cools the whole house through the existing \u003cstrong\u003educts\u003c\/strong\u003e, and the coil removes humidity from the air. In a large house, balancing the dampers between levels makes a real difference; we set them with you at commissioning.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's LogisVert list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and a compatible thermostat decides when the heat pump heats alone and when the electric furnace takes over. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The outdoor unit goes on a stand, above the snow line, on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eAt commissioning, we adjust the refrigerant charge, the blower speed and the thermostat's auxiliary heat threshold, then test cooling, heat pump heating, auxiliary heat from the electric elements and defrost.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC maintenance\u003c\/strong\u003e of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003eAt this size, a large volume of air passes through the filter every hour, so it gets dirty faster than in a small house. Check it every month for the first few seasons. The electric furnace keeps its usual maintenance, centred on the blower, the heating elements and their connections.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67799327572260,"sku":"N4H5S60AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_N4H5S_5_TONNES_60000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082539"},{"product_id":"thermopompe-centrale-add-on-arcoaire-hsh4-haut-de-gamme-5-tonnes-60000-btu-serpentin-evd4x-24-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE HSH4 Premium | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A","description":"\u003ch2\u003eFive tons on an electric furnace, a choice to verify before you sign\u003c\/h2\u003e\u003cp\u003eThe ADD-ON system adds a heat pump to an existing electric furnace: a coil is installed on the furnace and the outdoor unit heats and cools through the same ducts. The furnace's electric elements are only used as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE HSH4 Premium | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eHSH460GKA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X60M24A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eA \u003cstrong\u003e5-ton\u003c\/strong\u003e system feels reassuring: with the largest capacity available, the house will surely never lack cool air. In cooling, however, it is the size that is least forgiving of a sizing error. This page helps you judge whether it suits your home, and explains what we check before recommending it.\u003c\/p\u003e\u003ch3\u003eWhat justifies a 5-ton system\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eA very large living area served by a single \u003cstrong\u003educt\u003c\/strong\u003e system, on two or three levels.\u003c\/li\u003e\u003cli\u003eLarge glazed areas facing south or west, with little shade.\u003c\/li\u003e\u003cli\u003eAn extended house whose duct system now serves rooms that did not exist originally.\u003c\/li\u003e\u003cli\u003eSignificant internal heat gains: a large open kitchen, many occupants, heavily equipped rooms.\u003c\/li\u003e\u003cli\u003eA load calculation that confirms a cooling load of that order.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eWhat should give you pause\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eA house that was recently insulated, or whose windows were replaced: its load has dropped since the old unit was bought.\u003c\/li\u003e\u003cli\u003eAn old air conditioner of the same size that short-cycled and left the air humid: it was probably oversized.\u003c\/li\u003e\u003cli\u003eA duct system designed for a furnace alone, with few returns.\u003c\/li\u003e\u003cli\u003eA furnace blower that is not designed for this airflow.\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eThe room-by-room \u003cstrong\u003eload calculation\u003c\/strong\u003e settles these signals. In an ADD-ON, the furnace's electric elements cover the deep cold, so the heat pump is sized on cooling. If the calculation ends up at a smaller size, we tell you, even if you had 5 tons in mind at the start.\u003c\/p\u003e\u003ch3\u003eThe ducts, the limit people forget\u003c\/h3\u003e\u003cp\u003eA unit only delivers its capacity if the air can move. At this size, the coil requires a large airflow, which the main ducts, the branches and above all the returns must be able to carry. A duct system designed for a furnace alone is often too narrow for that: air whistles at the grilles, the blower struggles, and the actual capacity falls short of what was expected.\u003c\/p\u003e\u003cp\u003eDuring the visit, we observe the duct system and measure what needs measuring. If a return must be added or a section enlarged, the quote spells it out. Sometimes the conclusion is that a smaller size will make better use of the existing ducts.\u003c\/p\u003e\u003ch3\u003eThe furnace blower\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003efurnace blower\u003c\/strong\u003e moves the air through the coil. Each furnace's documentation states the maximum cooling capacity its blower can serve; we check it on your model. A blower too weak for this size would leave the coil starved of air, reduce capacity and leave the house humid in summer.\u003c\/p\u003e\u003cp\u003eWe also check the condition of the blower itself: bearings, cleanliness of the wheel, speed settings. A dirty or worn blower loses airflow, which weighs heavily at this size. And if the furnace is nearing the end of its life, we tell you before the quote: an ADD-ON only makes sense on a reliable furnace.\u003c\/p\u003e\u003ch3\u003eA large house: one system or two\u003c\/h3\u003e\u003cp\u003eIn a very large house, a single 5-ton system is not always the best answer. When the upper floor is hard to cool from the basement, or the existing duct system cannot carry all the air needed, two smaller systems, each serving part of the house, sometimes give better comfort. We present the options that suit your home, with their advantages and limits, rather than a single size.\u003c\/p\u003e\u003ch3\u003eThe HSH4 series and the 24.5 in. coil\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eHSH460GKA\u003c\/strong\u003e unit belongs to the HSH4 series, one of Arcoaire's Premium series. The \u003cstrong\u003eEVD4X60M24A\u003c\/strong\u003e coil, a \u003cstrong\u003e24.5 in.\u003c\/strong\u003e format, is the same for the other series of this size. It must match the width of the furnace cabinet, with a sealed sheet-metal transition when needed, and it fits between the air outlet and the plenum.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eHSH460GKA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X60M24A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility.\u003c\/p\u003e\u003cp\u003eIf the load calculation points you to another size, those are the ratings of that pairing we confirm. This page therefore shows no efficiency rating.\u003c\/p\u003e\u003ch3\u003eWinter and summer with this system\u003c\/h3\u003e\u003cp\u003eIn cool weather, the heat pump heats alone; when the cold deepens and it is no longer enough, the \u003cstrong\u003ethermostat\u003c\/strong\u003e brings in the furnace's electric elements as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e. The auxiliary heat threshold is set at commissioning according to the heat loss of the house and your preferences. The heat pump's air is less hot than the air from the electric elements and its cycles are longer; during defrost, a plume of vapour comes out of the outdoor unit and the furnace's elements may come on briefly.\u003c\/p\u003e\u003cp\u003eIn summer, the heat pump cools the whole house through the ducts, and the coil removes humidity from the air, which drains through the condensate line to the floor drain or a pump. A correctly sized unit runs long enough to dry the air well, which you feel during humid summers in \u003cstrong\u003eMontreal\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's LogisVert list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and a compatible thermostat decides when the heat pump heats alone and when the electric furnace takes over. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The outdoor unit goes on a stand, above the snow line, on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe outdoor unit, bulky at this size, is placed out of roof drip and away from bedroom windows, according to your municipality's rules, with an outdoor disconnect within sight. The insulated \u003cstrong\u003erefrigerant line set\u003c\/strong\u003e, with a diameter suited to this pairing, is brazed under nitrogen, pressure-tested and evacuated before the \u003cstrong\u003eR-410A\u003c\/strong\u003e charge. We also check the capacity of the electrical panel, which already feeds the furnace and its elements.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC maintenance\u003c\/strong\u003e of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003eKeep the return grilles free of furniture and curtains: at this size, the slightest obstruction on the return side affects the airflow. The electric furnace keeps its usual maintenance, centred on the blower, the heating elements and their connections.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE HSH4 Premium | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67799327605028,"sku":"HSH460GKA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_HSH4_5_TONNES_60000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082539"},{"product_id":"thermopompe-centrale-add-on-arcoaire-r4h5s-economique-5-tonnes-60000-btu-serpentin-evd4x-24-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A","description":"\u003ch2\u003eAdd the heat pump now, replace the furnace later\u003c\/h2\u003e\u003cp\u003eThe ADD-ON system adds a heat pump to an existing electric furnace: a coil is installed on the furnace and the outdoor unit heats and cools through the same ducts. The furnace's electric elements are only used as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eR4H5S60AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X60M24A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eMany owners of large homes find themselves in the same situation: the \u003cstrong\u003eelectric furnace\u003c\/strong\u003e still works well, but it is no longer new; the air conditioner has died, or there never was one; and replacing the whole system at once is not the project they want. The ADD-ON lets you move forward in two steps. This page explains how, and what we check today so that the next step goes smoothly.\u003c\/p\u003e\u003ch3\u003eA project in two steps\u003c\/h3\u003e\u003cp\u003eStep one: the \u003cstrong\u003ecentral heat pump\u003c\/strong\u003e is added to the existing electric furnace. It handles summer cooling and heating in mild and cool weather, and the furnace's electric elements stay as backup for the coldest days. Step two, later: the day the furnace reaches the end of its life, it is replaced without having to redo the outdoor unit or, in many cases, the coil.\u003c\/p\u003e\u003cp\u003eThis approach spreads the work over time and lets you enjoy air conditioning and heat pump heating right away, without waiting for the furnace to give out.\u003c\/p\u003e\u003ch3\u003eThe furnace's elements work less\u003c\/h3\u003e\u003cp\u003eOnce the heat pump is in place, the furnace's electric elements only come on when the cold exceeds what the heat pump can supply. They therefore accumulate fewer operating hours each winter. The furnace remains essential equipment, though: its elements are what keep the house comfortable during deep cold. Its usual maintenance must continue, and its blower now works all year round, since it also serves the air conditioning. That is why, from the visit onward, we check the condition of its bearings, wheel and motor.\u003c\/p\u003e\u003ch3\u003eWhen the furnace has to be replaced\u003c\/h3\u003e\u003cp\u003eWhen the day comes, two paths open up. If you keep a furnace, a new electric furnace of the same width, whose blower can serve the system's capacity, generally accepts the existing coil; the outdoor unit stays in place. If you would rather have an air handler fitted with electric backup elements, the outdoor unit can be paired with a compatible model.\u003c\/p\u003e\u003cp\u003eIn both cases, the new pairing must be verified and its ratings confirmed, as for a new system. We will explain it to you at that time; what matters today is not to close any doors.\u003c\/p\u003e\u003cp\u003eThe heat pump thermostat installed today can often stay in place with a new electric furnace as well as with an air handler; if needed, it is reconfigured to control the heat pump and the new electric backup.\u003c\/p\u003e\u003ch3\u003eWhat we check today for tomorrow\u003c\/h3\u003e\u003cul\u003e\u003cli\u003ethe width of the furnace cabinet, to match the 24.5 in. coil without compromise;\u003c\/li\u003e\u003cli\u003ethe blower's ability to serve a 5-ton system, today as with the future furnace;\u003c\/li\u003e\u003cli\u003ethe plenum and the clearance, which will have to accommodate the coil now and later;\u003c\/li\u003e\u003cli\u003ethe line set, installed with the diameter and route suited to this size;\u003c\/li\u003e\u003cli\u003ethe capacity of the electrical panel, which already feeds the furnace and will also have to feed the backup of the equipment that replaces it one day.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eThe 5-ton size\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e5-ton\u003c\/strong\u003e size is the largest common residential size. It suits a very large house on two or three levels, a heavily glazed house or an extended house whose duct system serves many rooms, in \u003cstrong\u003eLongueuil\u003c\/strong\u003e as on the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e. These examples are only a guide. In an ADD-ON, we size the heat pump on the cooling load, established by a room-by-room \u003cstrong\u003eload calculation\u003c\/strong\u003e; if the calculation ends up at a smaller size, we tell you. An oversized unit cools in short cycles and dries the air poorly. If the load falls between two sizes, we present both options and the reason for our choice.\u003c\/p\u003e\u003ch3\u003eThe Economy series and the 24.5 in. coil\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eR4H5S60AKAAA\u003c\/strong\u003e unit belongs to Arcoaire's Economy series. The \u003cstrong\u003eEVD4X60M24A\u003c\/strong\u003e coil is the same as for the other series of this size: the outdoor unit is what sets them apart. The coil is a \u003cstrong\u003e24.5 in.\u003c\/strong\u003e format; it must match the width of the furnace cabinet, with a sealed sheet-metal transition when needed, and it fits between the air outlet and the plenum.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eR4H5S60AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X60M24A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility.\u003c\/p\u003e\u003cp\u003eYou receive them in writing with the quote; this page shows none.\u003c\/p\u003e\u003ch3\u003eDay to day, winter and summer\u003c\/h3\u003e\u003cp\u003eIn cool weather, the heat pump heats alone. When the cold deepens and it is no longer enough, the \u003cstrong\u003ethermostat\u003c\/strong\u003e brings in the furnace's electric elements as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e. The auxiliary heat threshold is set at commissioning according to the heat loss of the house and your preferences. The heat pump's air is less hot than the air from the electric elements, its cycles are longer, and a plume of vapour comes out of the outdoor unit during defrost; the furnace's elements may then come on briefly.\u003c\/p\u003e\u003cp\u003eIn summer, the same unit cools the whole house through the existing \u003cstrong\u003educts\u003c\/strong\u003e. The coil removes humidity from the air, and the water drains through the condensate line to the floor drain or a pump.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's LogisVert list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and a compatible thermostat decides when the heat pump heats alone and when the electric furnace takes over. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The outdoor unit goes on a stand, above the snow line, on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe outdoor unit, bulky at this size, is placed out of roof drip and away from bedroom windows, according to your municipality's rules, with an outdoor disconnect within sight. The insulated \u003cstrong\u003erefrigerant line set\u003c\/strong\u003e is brazed under nitrogen, pressure-tested and evacuated, then the \u003cstrong\u003eR-410A\u003c\/strong\u003e charge is adjusted at commissioning, along with the airflow and the thermostat's auxiliary heat threshold.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC maintenance\u003c\/strong\u003e of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003eKeep a note of the furnace's age and of what each maintenance visit finds. The day a technician reports advanced wear, you will have time to plan its replacement rather than face it in the middle of winter.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE R4H5S Economy | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67799336780068,"sku":"R4H5S60AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_R4H5S_5_TONNES_60000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082540"},{"product_id":"thermopompe-centrale-add-on-arcoaire-hsh6-haut-de-gamme-5-tonnes-60000-btu-serpentin-evd4x-24-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE HSH6 Premium | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A","description":"\u003ch2\u003eLiving day to day with a heat pump and an electric furnace in a large house\u003c\/h2\u003e\u003cp\u003eThe ADD-ON system adds a heat pump to an existing electric furnace: a coil is installed on the furnace and the outdoor unit heats and cools through the same ducts. The furnace's electric elements are only used as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE HSH6 Premium | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eHSH660GKA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X60M24A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eA heat pump added to an electric furnace does not behave quite like a furnace alone. Heat arrives differently, the thermostat makes decisions you never saw before, and some old settings become counterproductive. In a large house, these differences are more noticeable. This page brings together what you need to know to get the best comfort from it, season after season.\u003c\/p\u003e\u003ch3\u003eGentler heat, for longer\u003c\/h3\u003e\u003cp\u003eOn its own, the electric furnace blows very hot air in short cycles: the house warms up quickly, then cools down until the next cycle. The heat pump works differently. Its air is less hot, but it runs longer, and the temperature varies less between the start and the end of a cycle. In a large house on several levels, this more continuous circulation also reduces the gaps between rooms close to the furnace and rooms farther away.\u003c\/p\u003e\u003cp\u003eAt first, you may feel that the air at the registers is not warm enough. This is normal: heat is delivered more slowly, but more steadily. The thermostat's set point is still met.\u003c\/p\u003e\u003ch3\u003eNight-time setbacks\u003c\/h3\u003e\u003cp\u003eWith a furnace alone, it was common to lower the temperature sharply at night or during the workday. With a heat pump, too deep a setback has an unexpected effect: when it is time to raise the temperature again, the thermostat may judge the heat pump too slow and bring in the furnace's electric elements, even though the heat pump would have been enough.\u003c\/p\u003e\u003cp\u003eA moderate setback, or a steady set point, often gives the best result. Several heat pump thermostats manage the recovery themselves by starting earlier with the heat pump. At commissioning, we explain how yours behaves and which settings suit it.\u003c\/p\u003e\u003ch3\u003eThe blower: auto or continuous\u003c\/h3\u003e\u003cp\u003eIn auto mode, the furnace blower only runs during heating or cooling cycles. In continuous mode, it circulates air all the time. In a large house, continuous mode sometimes helps even out the temperature between levels and sends the air through the filter more often. In summer, on the other hand, auto mode favours dehumidification, because the water collected on the coil has time to drain between cycles. We help you choose according to the season and the layout of the house.\u003c\/p\u003e\u003ch3\u003eWinter humidity\u003c\/h3\u003e\u003cp\u003eIn winter, the cold outdoor air is dry, and the air in the house becomes dry too. If a humidifier is connected to the furnace, it generally stays in place; we check its position relative to the coil and its connection to the controls. Set its humidistat carefully during very cold weather: condensation on the bottom of the windows means the setting should be lowered.\u003c\/p\u003e\u003ch3\u003eDefrost, seen from inside\u003c\/h3\u003e\u003cp\u003eIn cold, humid weather, frost forms on the outdoor unit, which melts it with short defrost cycles. Outside, a plume of white vapour comes out of the unit. Inside, the furnace's electric elements may come on briefly so that the air at the registers stays warm in the meantime. Then the heat pump resumes its work. None of this indicates a breakdown.\u003c\/p\u003e\u003ch3\u003eSummer in a large house\u003c\/h3\u003e\u003cp\u003eIn summer, the same unit cools the whole house through the existing \u003cstrong\u003educts\u003c\/strong\u003e. The coil removes humidity from the air; the water drains through the condensate line to the floor drain or a pump. In a house on several levels, the upper floor often needs more air than the basement: we show you which dampers to adjust from one season to the next. A steady set point, rather than a sharp drop when you get home, gives better results during heat waves in \u003cstrong\u003eMontreal\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eThe 5-ton size and the HSH6 series\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e5-ton\u003c\/strong\u003e size is the largest common residential size. It suits a very large house on two or three levels, a heavily glazed house or an extended house, in \u003cstrong\u003eLaval\u003c\/strong\u003e or on the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e. These examples are only a guide: we size the heat pump on the cooling load, established by a room-by-room \u003cstrong\u003eload calculation\u003c\/strong\u003e, since the furnace's electric elements cover the deep cold. If the calculation ends up at a smaller size, we tell you.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eHSH660GKA\u003c\/strong\u003e unit belongs to the HSH6 series, one of Arcoaire's Premium series. The \u003cstrong\u003eEVD4X60M24A\u003c\/strong\u003e coil, a \u003cstrong\u003e24.5 in.\u003c\/strong\u003e format, is shared by the series of this size; it must match the width of the furnace cabinet, with a sealed sheet-metal transition when needed.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eHSH660GKA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X60M24A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility.\u003c\/p\u003e\u003cp\u003eThe confirmed ratings are given to you in writing; they are also used to set the thermostat's auxiliary heat threshold. This page shows none.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's LogisVert list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and a compatible thermostat decides when the heat pump heats alone and when the electric furnace takes over. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The outdoor unit goes on a stand, above the snow line, on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe outdoor unit is placed out of roof drip and away from bedroom windows, according to your municipality's rules, with an outdoor disconnect within sight. The insulated \u003cstrong\u003erefrigerant line set\u003c\/strong\u003e is brazed under nitrogen, pressure-tested and evacuated before the \u003cstrong\u003eR-410A\u003c\/strong\u003e charge.\u003c\/p\u003e\u003ch3\u003eCommissioning, and what we show you\u003c\/h3\u003e\u003cp\u003eAt commissioning, we adjust the refrigerant charge, the blower speed for each mode and the auxiliary heat threshold of the \u003cstrong\u003eheat pump thermostat\u003c\/strong\u003e, set according to the heat loss of the house and your preferences. We then test cooling, heat pump heating, auxiliary heat from the electric elements and defrost.\u003c\/p\u003e\u003cp\u003eBefore leaving, we show you how to read the thermostat, change the auxiliary heat threshold, choose the blower mode and replace the filter. These are the settings that make the difference day to day.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC maintenance\u003c\/strong\u003e of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003eIf you run the blower in continuous mode, the filter gets dirty faster: check it more often. The electric furnace keeps its usual maintenance, centred on the blower, the heating elements and their connections.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE HSH6 Premium | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67799337107748,"sku":"HSH660GKA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_HSH6_5_TONNES_60000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082539"},{"product_id":"thermopompe-centrale-add-on-arcoaire-h4h5s-ion-5-tonnes-60000-btu-serpentin-evd4x-24-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE H4H5S ION | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A","description":"\u003ch2\u003eA large capacity is only worth it if the ducts can deliver it\u003c\/h2\u003e\u003cp\u003eThe ADD-ON system adds a heat pump to an existing electric furnace: a coil is installed on the furnace and the outdoor unit heats and cools through the same ducts. The furnace's electric elements are only used as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE H4H5S ION | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eH4H5S60AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X60M24A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eAt this size, the heat pump produces a lot of heating or cooling, but it is the \u003cstrong\u003educt\u003c\/strong\u003e system that decides what actually reaches the rooms. Ducts that are too narrow, leaky or poorly balanced waste a good part of the capacity you paid for. In a large house, where air has to travel long distances and serve several levels, this question comes first.\u003c\/p\u003e\u003ch3\u003eThe main trunk, the branches and the dampers\u003c\/h3\u003e\u003cp\u003eThe duct system starts at the plenum, above the coil, with a main trunk running under the floors. Branches leave it toward each register, and risers go up to the upper floor. In a large house, the branches farthest from the trunk are often the weakest: air takes the shortest path, and rooms at the end of the run receive less than the others.\u003c\/p\u003e\u003cp\u003eBalancing dampers, placed where the branches start, correct these differences. They still have to exist and be accessible. Grilles matter too: a grille too small for the airflow it receives whistles and blows too hard. We examine these elements during the visit.\u003c\/p\u003e\u003ch3\u003eStatic pressure, the pulse of the duct system\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eStatic pressure\u003c\/strong\u003e measures the resistance the duct system puts up against the blower. Every element adds to it: the filter, the coil, elbows, undersized ducts, insufficient returns. The furnace manufacturer states the maximum pressure at which its blower delivers the intended airflow. Beyond that, airflow drops, the blower strains and gets noisy, and the heat pump loses capacity.\u003c\/p\u003e\u003cp\u003eAdding a coil to a duct system that is already tight can push it past that limit. That is why we assess the ducts before the quote, and measure static pressure at commissioning to set the blower accordingly.\u003c\/p\u003e\u003ch3\u003eReturns in a finished house\u003c\/h3\u003e\u003cp\u003eReturns are often the weak point of large duct systems, especially upstairs. Adding them in a house with finished walls and ceilings takes method: running through a joist bay, a closet, an existing bulkhead or an interior wall. We look for the least disruptive route, and the quote specifies the work and its location before you make your decision.\u003c\/p\u003e\u003cp\u003eA finished basement raises the same question for the plenum and trunk: a drop ceiling or an accessible bulkhead makes things simpler, a closed drywall ceiling makes them harder. We note it from the visit onward.\u003c\/p\u003e\u003ch3\u003eDuct leaks\u003c\/h3\u003e\u003cp\u003eA leaky duct system loses warm or cool air before it reaches the rooms. In a heated basement, that loss stays in the house; in a garage, a crawl space or an attic, it is lost. Accessible joints on the plenum and trunk are sealed with a product designed for that purpose, and sections in unheated spaces must be insulated. We systematically seal the joints around the coil and the plenum we modify.\u003c\/p\u003e\u003ch3\u003eWhen the ducts are not enough\u003c\/h3\u003e\u003cp\u003eSometimes the existing duct system cannot carry the airflow of a \u003cstrong\u003e5-ton\u003c\/strong\u003e system, even with a few corrections. Two paths are then open: enlarge the sections that restrict airflow, or choose a smaller size better suited to the existing ducts. We present both, with what each involves, and the quote reflects the option chosen.\u003c\/p\u003e\u003ch3\u003eThe 5-ton size and the ION series\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e5-ton\u003c\/strong\u003e size is the largest common residential size. It suits a very large house on two or three levels, a heavily glazed house or an extended house whose duct system serves many rooms, in \u003cstrong\u003eLongueuil\u003c\/strong\u003e or on the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e. These examples are only a guide. A room-by-room \u003cstrong\u003eload calculation\u003c\/strong\u003e establishes the cooling load; in an ADD-ON, the furnace's electric elements cover the deep cold, and an oversized unit would cool in short cycles.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eH4H5S60AKAAA\u003c\/strong\u003e unit is part of Arcoaire's ION series. The \u003cstrong\u003eEVD4X60M24A\u003c\/strong\u003e coil, a \u003cstrong\u003e24.5 in.\u003c\/strong\u003e format, is shared by the series of this size; it must match the width of the furnace cabinet, with a sealed sheet-metal transition when needed.\u003c\/p\u003e\u003ch3\u003eSystem ratings\u003c\/h3\u003e\u003cp\u003eThe pairing of the \u003cstrong\u003eH4H5S60AKAAA\u003c\/strong\u003e outdoor unit and the \u003cstrong\u003eEVD4X60M24A\u003c\/strong\u003e coil is not listed with SEER2 ratings in the AHRI certification directory. We confirm the ratings of the complete system before the quote; they also determine grant eligibility.\u003c\/p\u003e\u003cp\u003eRatings, even certified ones, assume airflow that matches the test conditions. The work on the duct system is precisely what brings your home close to them. This page shows no rating for this pairing.\u003c\/p\u003e\u003ch3\u003eHeating and cooling, day to day\u003c\/h3\u003e\u003cp\u003eIn cool weather, the heat pump heats alone; when the cold deepens and it is no longer enough, the \u003cstrong\u003ethermostat\u003c\/strong\u003e brings in the furnace's electric elements as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e. The auxiliary heat threshold is set at commissioning according to the heat loss of the house and your preferences. The heat pump's air is less hot than the air from the electric elements and its cycles are longer; during defrost, a plume of vapour comes out of the outdoor unit and the furnace's elements may come on briefly.\u003c\/p\u003e\u003cp\u003eIn summer, the heat pump cools the whole house, and the coil removes humidity from the air, which drains through the condensate line. A well-balanced duct system sends cool air where it is lacking, especially upstairs.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's LogisVert list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and a compatible thermostat decides when the heat pump heats alone and when the electric furnace takes over. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The outdoor unit goes on a stand, above the snow line, on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe outdoor unit is placed out of roof drip and away from bedroom windows, according to your municipality's rules, with an outdoor disconnect within sight; we check the capacity of the electrical panel, which already feeds the electric furnace. The insulated \u003cstrong\u003erefrigerant line set\u003c\/strong\u003e is brazed under nitrogen, pressure-tested and evacuated, then the \u003cstrong\u003eR-410A\u003c\/strong\u003e charge is adjusted at commissioning, along with the blower speed, the damper balancing and the thermostat's auxiliary heat threshold.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC maintenance\u003c\/strong\u003e of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003eA finer filter traps more dust, but it also raises static pressure. If you change filter types, ask us first. Finally, keep the return grilles clear and do not change the balancing dampers without noting their original position.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE H4H5S ION | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67799337337124,"sku":"H4H5S60AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_H4H5S_5_TONNES_60000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082528"},{"product_id":"thermopompe-centrale-add-on-arcoaire-h4h7t-ion-2-stages-5-tonnes-60000-btu-serpentin-evd4x-24-5-po-r410a","title":"Central Heat Pump ADD-ON ARCOAIRE H4H7T ION 2 stages | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A","description":"\u003ch2\u003eTwo compressor stages and an electric furnace to share the winter of a large house\u003c\/h2\u003e\u003cp\u003eThe ADD-ON system adds a heat pump to an existing electric furnace: a coil is installed on the furnace and the outdoor unit heats and cools through the same ducts. The furnace's electric elements are only used as backup. The \u003cstrong\u003eCentral Heat Pump ADD-ON ARCOAIRE H4H7T ION 2 stages | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A\u003c\/strong\u003e pairs the \u003cstrong\u003eH4H7T60AKAAA\u003c\/strong\u003e outdoor unit with the \u003cstrong\u003eEVD4X60M24A\u003c\/strong\u003e coil.\u003c\/p\u003e\u003cp\u003eIts ratings are \u003cstrong\u003e14.3 SEER2\u003c\/strong\u003e, \u003cstrong\u003e10.5 EER2\u003c\/strong\u003e and \u003cstrong\u003e7.5 HSPF2\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eIn a large house, winter is not handled by a single heat source. This pairing combines a \u003cstrong\u003etwo-stage compressor\u003c\/strong\u003e with the \u003cstrong\u003eelectric furnace\u003c\/strong\u003e already in place, with capacities published in the AHRI certification directory. This page shows how these three levels of response share the season, and what the certificate's figures let us set up in your home.\u003c\/p\u003e\u003ch3\u003eThe 5-ton size: which home it suits\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003e5-ton\u003c\/strong\u003e size is the largest common residential size. It suits a very large house on two or three levels, a heavily glazed house facing south or west, or an extended house whose \u003cstrong\u003educt\u003c\/strong\u003e system serves many rooms, in \u003cstrong\u003eLaval\u003c\/strong\u003e as on the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e. These examples are only a guide: insulation, sun exposure and airtightness change the actual load considerably.\u003c\/p\u003e\u003cp\u003eIn an ADD-ON, we size the heat pump on the cooling load, established by a room-by-room \u003cstrong\u003eload calculation\u003c\/strong\u003e, since the furnace's electric elements cover the deep cold. If the calculation ends up at a smaller size, we tell you: an oversized unit cools in short cycles and dries the air poorly.\u003c\/p\u003e\u003ch3\u003eWhat the certificate shows\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eAt -8 °C\u003c\/strong\u003e (17 °F): \u003cstrong\u003e36,200 BTU\/h\u003c\/strong\u003e.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eAt -15 °C\u003c\/strong\u003e (5 °F): \u003cstrong\u003e28,800 BTU\/h\u003c\/strong\u003e, with a \u003cstrong\u003eCOP of 1.98\u003c\/strong\u003e.\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eThe two points are measured separately; we report each one as published. These figures come from certificate \u003cstrong\u003eAHRI 213677793\u003c\/strong\u003e, as published in the AHRI certification directory.\u003c\/p\u003e\u003ch3\u003eWhy capacity drops as the cold deepens\u003c\/h3\u003e\u003cp\u003eA heat pump captures the heat contained in the outdoor air. The colder that air, the less heat there is to capture, and the harder the compressor must work to bring it up to the house. For this system of \u003cstrong\u003e60,000 BTU\u003c\/strong\u003e nominal, the published capacity represents about 60% of the size at -8 °C and about 48% at -15 °C.\u003c\/p\u003e\u003cp\u003eMeanwhile, the house loses more and more heat as the outdoor temperature falls. The two curves cross at a temperature specific to each house, the \u003cstrong\u003ebalance point\u003c\/strong\u003e. We estimate it from your load calculation and the certified capacities, then set the thermostat accordingly.\u003c\/p\u003e\u003ch3\u003eA winter in three modes\u003c\/h3\u003e\u003cp\u003eIn mild weather, the compressor runs on its reduced stage: cycles are long and the temperature stays even from one room to the next. When the cold sets in, it moves to its full stage. Below the balance point, the \u003cstrong\u003ethermostat\u003c\/strong\u003e brings in the electric elements of the \u003cstrong\u003efurnace\u003c\/strong\u003e as \u003cstrong\u003eauxiliary heat\u003c\/strong\u003e, alongside the heat pump; on the coldest days, they carry most of the heating.\u003c\/p\u003e\u003cp\u003eThe auxiliary heat threshold takes into account the house and your preferences; we set it at commissioning and show you how to change it. The heat pump's air is less hot than the air from the electric elements, and its cycles are longer: this is normal. During defrost, a plume of vapour comes out of the outdoor unit, and the furnace's elements may come on briefly so that the air at the registers stays warm.\u003c\/p\u003e\u003ch3\u003eThe seasonal ratings, plainly\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSEER2\u003c\/strong\u003e at 14.3 measures cooling efficiency over a typical summer, and \u003cstrong\u003eEER2\u003c\/strong\u003e at 10.5 the efficiency at full load on a hot day. \u003cstrong\u003eHSPF2\u003c\/strong\u003e at 7.5 measures heating efficiency over a full season.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eCOP\u003c\/strong\u003e gives the efficiency at a specific temperature. An electric baseboard has a COP of 1: it delivers the energy it consumes, no more. At -15 °C, this system shows a COP of 1.98: at that test point, it delivers nearly twice the heat it consumes in electricity. These ratings are established under standardized test conditions; in your home, airflow and maintenance affect what the system actually delivers.\u003c\/p\u003e\u003ch3\u003eThe time-delay relay (TDR)\u003c\/h3\u003e\u003cp\u003eThese ratings are certified with the manufacturer's \u003cstrong\u003etime-delay relay (TDR)\u003c\/strong\u003e; we install it with the coil. This relay briefly keeps the blower running after the compressor stops, to make use of the cooling left in the coil. Without it, the installation would not quite match the certified configuration.\u003c\/p\u003e\u003ch3\u003eThe furnace blower and the 24.5 in. coil\u003c\/h3\u003e\u003cp\u003eIn an ADD-ON, the \u003cstrong\u003efurnace blower\u003c\/strong\u003e moves the air through the coil. At this size, it must deliver a large airflow; the furnace documentation states the maximum cooling capacity its blower can serve, and we check it on your model. A blower that is too weak would leave the coil starved of air and deliver less capacity than the certificate shows.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eEVD4X60M24A\u003c\/strong\u003e coil is a \u003cstrong\u003e24.5 in.\u003c\/strong\u003e format, designed for the wide cabinets of high-capacity furnaces. It must match the width of the cabinet, with a sealed sheet-metal transition when needed, and it fits between the air outlet and the plenum.\u003c\/p\u003e\u003ch3\u003eSummer in a large house\u003c\/h3\u003e\u003cp\u003eIn summer, the coil cools the air and removes humidity, which drains through the condensate line to the floor drain or a pump. The compressor's reduced stage suits hot, humid days well: it runs for a long time at low capacity, which gives the coil time to dry the air. During heat waves in \u003cstrong\u003eMontreal\u003c\/strong\u003e, the full stage takes over. In a house on several levels, balancing the dampers helps the upper floor get its share of cool air.\u003c\/p\u003e\u003ch3\u003eLogisVert\u003c\/h3\u003e\u003cp\u003eThis pairing does not carry an amount on Hydro-Québec's LogisVert list of October 19, 2026. If the grant matters for your project, we will point you to an eligible pairing of comparable size.\u003c\/p\u003e\u003ch2\u003eInstallation on the existing furnace\u003c\/h2\u003e\u003cp\u003eThe coil sits on the furnace's air outlet, and a compatible thermostat decides when the heat pump heats alone and when the electric furnace takes over. We check the condition of the furnace, the airflow of its blower and the duct sizes before the quote. The outdoor unit goes on a stand, above the snow line, on a \u003cstrong\u003ededicated circuit\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eThe outdoor unit, the line set and the electrical work\u003c\/h3\u003e\u003cp\u003eAt this size, the outdoor unit is bulky. It sits on a sturdy stand, out of roof drip and away from bedroom windows, according to your municipality's rules. The insulated \u003cstrong\u003erefrigerant line set\u003c\/strong\u003e, with a diameter suited to this pairing, is brazed under nitrogen, pressure-tested and evacuated, then the \u003cstrong\u003eR-410A\u003c\/strong\u003e charge is adjusted at commissioning. Before the quote, we check the capacity of the electrical panel, which already feeds the electric furnace; the connection includes a dedicated circuit, an outdoor disconnect and control wiring to the furnace and thermostat.\u003c\/p\u003e\u003cp\u003eCommissioning ends with a test of each mode: cooling, heat pump heating on both stages, auxiliary heat from the furnace's elements and defrost.\u003c\/p\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cp\u003eReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual \u003cstrong\u003eHVAC maintenance\u003c\/strong\u003e of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.\u003c\/p\u003e\u003cp\u003eAt this size, a large volume of air passes through the filter and the coil: a clogged filter quickly costs part of the certified capacity. Check it every month for the first few seasons. The electric furnace keeps its usual maintenance, centred on the blower, the heating elements and their connections.\u003c\/p\u003e\u003ch3\u003eAirGreen, for the life of the installation\u003c\/h3\u003e\u003cp\u003eA family business active for more than fifteen years in \u003cstrong\u003eMontreal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e and the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e, we hold RBQ licences for ventilation, refrigeration and electrical work and carry \u003cstrong\u003e$5,000,000\u003c\/strong\u003e in liability insurance. The in-home assessment is free, the quote is in writing, and our \u003ca href=\"\/en\/pages\/financement-avec-financeit\"\u003efinancing options\u003c\/a\u003e let you choose the right unit rather than the cheapest one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRequest your free estimate for the Central Heat Pump ADD-ON ARCOAIRE H4H7T ION 2 stages | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAvailable while supplies last.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 years on the compressor, 10 years on parts and 6 years on labor.\u003c\/p\u003e","brand":"Arcoaire","offers":[{"title":"Default Title","offer_id":67799337763108,"sku":"H4H7T60AKAAA","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/THERMOPOMPE_CENTRALE_ADD_ON_ARCOAIRE_H4H7T_5_TONNES_60000_BTU_R410A_00_MONTREAL_LAVAL_LONGUEUIL_RIVE_SUD.png?v=1793082528"}],"url":"https:\/\/airgreen.ca\/en\/collections\/thermopompe-centrale-add-on-arcoaire-installation-grand-montreal-monteregie.oembed","provider":"AirGreen Climatisation \u0026 Chauffage \/ Air Conditioning \u0026 Heating","version":"1.0","type":"link"}