Central Heat Pump ADD-ON ARCOAIRE N4H5S Performance | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A

The largest residential size calls for an installation to matchThe 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 N4H5S Performance | 5 Tons - 60,000 BTU (Coil EVD4X 24.5 in.) - R410A pairs the N4H5S60AKAAA outdoor unit with the EVD4X60M24A coil.The 5-ton size is the largest common residential size. At this size, everything around the equipment matters as much as the equipment itself: the electrical service, the furnace blower, the diameter of the line set, the space available outside. This page details those points, which we check before giving you a quote.Five tons: which homesThis size suits homes with a high cooling load: a very large two-level house with a finished basement, a heavily glazed house facing south or west, an extended house whose duct system serves many rooms, in Laval, on the North Shore or on the South Shore. These examples are only a guide. Insulation, sun exposure and airtightness change the actual load considerably.The room-by-room load calculation often ends up at a smaller size than expected, especially in a recent, well-insulated house. In that case, we tell you. In an ADD-ON, the furnace's electric elements cover the deep cold; the heat pump is sized on cooling, and an oversized unit cools in short cycles and dries the air poorly.The home's electrical capacityAn outdoor unit of this size is a significant electrical load. It needs a dedicated circuit with a suitable breaker, free space in the panel and an electrical service able to carry it on top of the home's other appliances. Because the furnace itself is electric and stays connected for backup, this is often the first point to check, especially in an older house.During the visit, we look at the panel, the electrical service and the loads already connected, starting with the electric furnace. If a panel modification or a service upgrade is needed, the quote spells it out. An outdoor disconnect, within sight of the unit, completes the connection.A larger outdoor unitThe outdoor unit of a 5-ton system is bulkier and heavier than that of a small size. It needs a sturdy stand, designed for its weight, that keeps it above the snow line. It also needs an access path to bring it to its location, and enough space around it for air to flow freely, according to the manufacturer's clearances. We level it on its stand and secure it so that it stays stable under wind and the weight of snow.Like any heat pump that works in winter, it is placed out of roof drip, away from bedroom windows, yours or your neighbour's, and in compliance with your municipality's rules on outdoor equipment.The line set of a large systemThe refrigerant line set must have the diameter this pairing requires. An existing line set, installed years ago for a smaller air conditioner, is often too narrow for a 5-ton system; we then replace it. The suction line is insulated along its entire length to prevent condensation in summer and losses in winter. The line set passes through the wall via a sealed opening, its joints are brazed under nitrogen, then it undergoes a pressure test and a vacuum before the R-410A charge.The furnace blower has to keep upIn an ADD-ON, the furnace blower moves the air through the coil. At this size, it must deliver a large airflow. Not every furnace can: its documentation states the maximum cooling capacity planned for its blower. We check this point on your model before the quote.If the blower is not enough, the coil is starved of air: capacity drops, the coil may freeze in cooling mode and the house stays humid. In that case, it is better to choose a smaller size or consider another type of system, and we tell you so clearly.The 24.5 in. coil and the Performance seriesThe EVD4X60M24A coil is a 24.5 in. format, designed for the wide cabinets of high-capacity furnaces. If your furnace's width differs, a sealed sheet-metal transition joins them, and the plenum is adjusted to accommodate the coil. The condensate drain, fitted with a trap, runs to the floor drain or a pump.The N4H5S60AKAAA unit belongs to Arcoaire's Performance series. The same coil goes with the other series of this size; the outdoor unit is what sets them apart.System ratingsThe pairing of the N4H5S60AKAAA 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.You receive these ratings in writing with the quote; this page shows none.Heating and cooling, day to dayIn 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, its cycles are longer, and a plume of vapour comes out of the outdoor unit during defrost: this is normal.In summer, the same unit cools the whole house through the existing ducts, and the coil removes humidity from the air. In a large house, balancing the dampers between levels makes a real difference; we set them with you at commissioning.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.At commissioning, we adjust the refrigerant charge, the blower speed and the thermostat's auxiliary heat threshold, then test cooling, heat pump heating, auxiliary heat from the electric elements and defrost.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.At this size, a large volume of air passes through the filter every hour, so it gets dirty faster than in a small house. Check it every month for the first few seasons. 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 N4H5S Performance | 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.