{"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","url":"https:\/\/airgreen.ca\/en\/products\/thermopompe-centrale-add-on-arcoaire-hsh6-haut-de-gamme-1-5-tonnes-18000-btu-serpentin-evd4x-14-5-po-r410a","provider":"AirGreen Climatisation \u0026 Chauffage \/ Air Conditioning \u0026 Heating","version":"1.0","type":"link"}