{"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","url":"https:\/\/airgreen.ca\/en\/products\/thermopompe-centrale-add-on-arcoaire-h4h5s-ion-4-tonnes-48000-btu-serpentin-evd4x-24-5-po-r410a","provider":"AirGreen Climatisation \u0026 Chauffage \/ Air Conditioning \u0026 Heating","version":"1.0","type":"link"}