{"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","url":"https:\/\/airgreen.ca\/en\/products\/thermopompe-centrale-add-on-arcoaire-h4h7t-ion-2-stages-4-tonnes-48000-btu-serpentin-evd4x-24-5-po-r410a","provider":"AirGreen Climatisation \u0026 Chauffage \/ Air Conditioning \u0026 Heating","version":"1.0","type":"link"}