Central Heat Pump ARCOAIRE H4H5S ION | 5 Tons - 60,000 BTU (Air Handler FJMA4X) - R410A

A very large home comfortable all year, with a system chosen for its envelope

In a very large home with ductwork, a central heat pump handles all the cooling and most of the heating, with a single thermostat. The Central Heat Pump ARCOAIRE H4H5S ION | 5 Tons - 60,000 BTU (Air Handler FJMA4X) - R410A pairs the H4H5S60AKAAA outdoor unit with the FJMA4X60L0DB indoor unit, an air handler that pushes air through the existing duct system.

Its ratings are 14.3 SEER2, 12.0 EER2 and 7.5 HSPF2. Before getting into the figures, this page starts from the house itself, because it is the house that decides whether a 5-ton system is the right one.

The house first, the unit second

The size of a central heat pump depends on what the house loses in winter and gains in summer: through the walls, the attic, the windows, air leaks and the sun. Two homes of the same floor area can need very different sizes. That is why we start with a room-by-room load calculation rather than with the size of the old unit.

In a very large home, the stakes are real: a five-ton unit installed in a house that needs less runs short cycles, dehumidifies poorly in summer and creates gaps between rooms. A justified size, on the other hand, runs long, steady cycles and keeps the house even.

Insulation and airtightness: what can change the size

Some work significantly reduces a home's needs: attic insulation, sealing air leaks around windows, doors and the rim joist, replacing old windows. If you are planning such work, tell us before the load calculation. The size must match the house as it will be, not as it was.

Conversely, an enlarged home or a newly finished basement increases the needs. We take these changes into account to recommend the right size, whether it is this one or another.

Homes suited to the 5-ton size

This size typically targets very large homes: two spacious levels with a fully finished basement, a very spread-out single-storey home with large glazed areas, or an enlarged home whose duct system serves many rooms. These are typical examples, which only the calculation confirms.

When the calculation lands on the line between two sizes, planned envelope work often tips the balance toward the smaller one. We then present both options, with their consequences for the backup heat and the duct system.

What the certificate shows

The certificate lists 36,000 BTU/h at -8 °C (17 °F) and 28,400 BTU/h at -15 °C (5 °F), with a COP of 2.32 at the -15 °C point. The two points are measured separately; we report each one as published.

These figures come from certificate AHRI 210998756, as published in the AHRI certification directory, for the pairing of the H4H5S60AKAAA outdoor unit and the FJMA4X60L0DB indoor unit. It is this exact pairing that we install.

Efficiency, in plain words

• HSPF2 (7.5): seasonal heating efficiency over a typical winter.
• COP (2.32 at -15 °C): the heat delivered divided by the electricity consumed, at that temperature. An electric baseboard has a COP of 1; at this point, the heat pump delivers more than twice the energy it consumes.
• SEER2 (14.3): seasonal cooling efficiency over a typical summer.
• EER2 (12.0): cooling efficiency on a hot day, at full demand.

These ratings make it possible to compare systems measured under the same protocols. Actual consumption then depends on the house, its envelope and its setpoints, which is why it pays to look at the envelope at the same time as the unit.

Winter and backup heat

At -8 °C, the listed capacity represents about 60% of the 60,000 BTU nominal size; at -15 °C, about 47%. This pairing is a conventional central heat pump; it is not listed as a cold-climate heat pump. The colder it gets, the more heat the house loses and the less heat the heat pump can extract from the air.

In deep cold, the air handler's backup heat, or the existing furnace in an installation that keeps it, supplements the heat. An improved envelope delays that moment: the heat pump works alone for longer into the winter. We size the backup heat according to the load calculation and the certificate points.

Ventilation and air quality

A well-sealed home holds its heat better, but it needs controlled ventilation. If the home has an air exchanger, we check its connection to the duct system during the replacement. The air handler's filter, replaced regularly, traps some of the dust circulating in the house.

In winter, indoor air becomes dry, whatever the heating method; a humidifier connected to the duct system can complement the system. We discuss it during the visit if it is a concern in your home.

Summer: cooling and dehumidification

In summer, a reversing valve flips the cycle: the indoor coil captures heat from the house and the R-410A refrigerant carries it to the outdoor unit. Cool air goes back through the ducts to the upstairs bedrooms; the moisture removed from the air drains through the condensate drain.

Here again, the envelope matters. A well-insulated attic limits the heat that comes down into the upstairs bedrooms, and closed blinds on large west-facing windows reduce the late-afternoon load. The system then holds a reasonable setpoint without strain, and its long cycles dry the house well.

LogisVert

This 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 in a ducted home

The indoor unit takes the place of the old furnace or air handler and connects to the existing duct system. Before the quote, we check duct sizes and the air return, because a central heat pump only delivers its full efficiency if the airflow keeps up. The outdoor unit goes on a stand, above the snow line, on a dedicated circuit.

Ducts, electrical and commissioning

At this size, airflow is high: we check the main ducts and the presence of air returns on each level. The heat pump is fed by a dedicated circuit and the backup heat by its own; the panel's capacity is checked during the visit and any electrical work appears in the quote.

• Air handler installed on the plenum and return, with the planned backup heat.
• Outdoor unit on a stand, above the snow line, away from snow sliding off the roof.
• Line set insulated, evacuated and checked; condensate drain connected to a compliant discharge point.
• Commissioning: charge, temperatures, airflow, balancing, thermostat and an explanation of the settings.

Maintenance

Replace 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. A clean coil and a clean filter keep the system close to its ratings, year after year.

AirGreen, for the life of the installation

A 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 ARCOAIRE H4H5S ION | 5 Tons - 60,000 BTU (Air Handler FJMA4X) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.

Warranty: 10 years on the compressor, 10 years on parts and 6 years on labor.