Central Heat Pump ADD-ON ARCOAIRE HSH4 Premium | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A

Five tons on an electric furnace, a choice to verify before you signThe 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 Central Heat Pump ADD-ON ARCOAIRE HSH4 Premium | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A pairs the HSH460GKA outdoor unit with the EVD4X60M24A coil.A 5-ton 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.What justifies a 5-ton systemA very large living area served by a single duct system, on two or three levels.Large glazed areas facing south or west, with little shade.An extended house whose duct system now serves rooms that did not exist originally.Significant internal heat gains: a large open kitchen, many occupants, heavily equipped rooms.A load calculation that confirms a cooling load of that order.What should give you pauseA house that was recently insulated, or whose windows were replaced: its load has dropped since the old unit was bought.An old air conditioner of the same size that short-cycled and left the air humid: it was probably oversized.A duct system designed for a furnace alone, with few returns.A furnace blower that is not designed for this airflow.The room-by-room load calculation 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.The ducts, the limit people forgetA 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.During 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.The furnace blowerThe furnace blower 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.We 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.A large house: one system or twoIn 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.The HSH4 series and the 24.5 in. coilThe HSH460GKA unit belongs to the HSH4 series, one of Arcoaire's Premium series. The EVD4X60M24A coil, a 24.5 in. 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.System ratingsThe pairing of the HSH460GKA outdoor unit and the EVD4X60M24A 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.If the load calculation points you to another size, those are the ratings of that pairing we confirm. This page therefore shows no efficiency rating.Winter and summer with this systemIn cool weather, the heat pump heats alone; when the cold deepens and it is no longer enough, the thermostat brings in the furnace's electric elements as auxiliary heat. 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.In 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 Montreal.LogisVertThis 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.Installation on the existing furnaceThe 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 dedicated circuit.The 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 refrigerant line set, with a diameter suited to this pairing, is brazed under nitrogen, pressure-tested and evacuated before the R-410A charge. We also check the capacity of the electrical panel, which already feeds the furnace and its elements.MaintenanceReplace the system filter according to its format, keep the outdoor unit clear of snow and leaves, and plan annual HVAC maintenance of the coil, condensate drain and electrical connections. In winter, white vapour during defrost is normal.Keep 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.AirGreen, for the life of the installationA family business active for more than fifteen years in Montreal, Laval, Longueuil, the North Shore and the South Shore, we hold RBQ licences for ventilation, refrigeration and electrical work and carry $5,000,000 in liability insurance. The in-home assessment is free, the quote is in writing, and our financing options let you choose the right unit rather than the cheapest one.Request 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.Available while supplies last.Warranty: 10 years on the compressor, 10 years on parts and 6 years on labor.