{"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","url":"https:\/\/airgreen.ca\/en\/products\/thermopompe-centrale-add-on-arcoaire-n4h5s-performance-3-5-tonnes-42000-btu-serpentin-evd4x-17-5-po-r410a","provider":"AirGreen Climatisation \u0026 Chauffage \/ Air Conditioning \u0026 Heating","version":"1.0","type":"link"}