Central Heat Pump ARCOAIRE HSH4 Premium | 4 Tons - 48,000 BTU (Air Handler FJMA4X) - R410A
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A large ducted home, heated and cooled by a single central system
The larger the home, the more it makes sense to rely on a single system that uses the existing ductwork. The Central Heat Pump ARCOAIRE HSH4 Premium | 4 Tons - 48,000 BTU (Air Handler FJMA4X) - R410A pairs the HSH448GKA outdoor unit with the FJMA4X48L0CB indoor unit, an air handler that pushes air through the duct system. It provides cooling for the whole house and most of the heating.
This pairing from Arcoaire's Premium range is offered while supplies last. Before going into detail, note that an important clarification about its ratings appears below, in the section on the certificate.
The 4-ton size, for which homes
The 4-ton size typically targets large homes: a two-level home with an open-concept living room and a finished basement, an enlarged split-level, or a very spread-out single-storey home with an office and a family room in the basement. These are typical examples, not rules.
The size is confirmed by a room-by-room load calculation. Attic and wall insulation, window area, orientation and envelope airtightness can change the result from one home to the next, even at equal size. If the calculation points to a smaller size, we recommend it: an oversized unit runs short cycles, dehumidifies poorly in summer and wears out faster.
What the certificate shows
The pairing of the HSH448GKA outdoor unit and the FJMA4X48L0CB indoor unit carries certificate AHRI 210448771, issued under the former test method, which predates SEER2 and HSPF2 ratings. Its ratings are not directly comparable to the SEER2 and HSPF2 ratings of recent units, so we do not mix them with those. We confirm during the visit the ratings that apply to the installed system.
That is why this page publishes no efficiency rating for this pairing. We prefer not to place side by side figures that are not measured the same way.
Why old and new ratings do not mix
SEER2 and HSPF2 ratings, like the EER2 rating, come from the current test method. The former method and the new one do not test units under the same conditions, particularly regarding the resistance the duct system puts up against airflow. A figure obtained with the former method therefore cannot be read on the same scale as a SEER2 figure.
Comparing two systems with ratings from different methods would lead to wrong conclusions. When you are weighing several pairings, we present you with data that are comparable with each other, on the same basis.
What we confirm before the quote
- The size, based on the room-by-room load calculation.
- The applicable ratings for the system that will actually be installed.
- Grant eligibility, which depends on the exact pairing.
- The condition of the duct system and air return, and the corrections to plan.
- The electrical panel's capacity for the heat pump and its backup heat.
Everything is set out in a written quote. If another pairing of the same size better meets your priorities, we present it to you.
How a central system works
The HSH448GKA outdoor unit captures heat from the outdoor air in winter and releases the home's heat in summer, thanks to a reversing valve that flips the cycle. The refrigerant is R-410A. The FJMA4X48L0CB indoor unit takes the place of the old furnace or air handler; it houses the indoor coil, the blower that feeds the whole duct system and the filter.
Because it moves heat instead of producing it, the heat pump delivers more energy than it consumes for most of the year. Air reaches the rooms through the existing registers, with no visible equipment. In winter, the outdoor unit periodically runs a defrost cycle of a few minutes; the vapour that rises from it then is normal.
High ceilings and open areas
Large homes often have a living room with a cathedral ceiling, a mezzanine or a stairwell open over two levels. Warm air rises and collects there: in winter, the lower part of the room stays cool; in summer, the mezzanine becomes the warmest area of the house.
A well-balanced duct system and the position of the air returns make a big difference. Running the blower continuously, depending on the thermostat setting, mixes the air between top and bottom and reduces those gaps. We look closely at these spaces during the visit, because they often decide how comfortable the whole house feels.
Winter: the heat pump first, the backup second
This pairing is a conventional central heat pump; it is not listed as a cold-climate heat pump. Its heating capacity drops as the outdoor temperature falls. In deep cold, the air handler's backup heat, or the existing furnace in an installation that keeps it, takes over.
In a home of this size, the backup heat is sized carefully, together with the available electrical capacity. The thermostat always runs the heat pump first.
Summer in a large home
In summer, cool air travels through the same ducts as the heat, up to the upstairs bedrooms. The indoor coil removes moisture from the air and the water drains through the condensate drain. The right size, running long cycles, dries the house better than an oversized unit that keeps starting and stopping.
In a large home, the upper floor also picks up heat from the roof in the afternoon. Closed blinds on the west side, returns upstairs and a steady setpoint help far more than a very low setpoint set at the end of the day. The system keeps the house comfortable when it can work steadily, rather than catching up on accumulated heat.
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.
The job, step by step
- Removal of the old unit and installation of the air handler on the existing plenum and return.
- Duct corrections listed in the quote, if any.
- Outdoor unit on a stand, above the snow line and away from snow sliding off the roof.
- Line set insulated, evacuated and checked; condensate drain connected to a discharge point.
- Dedicated circuit, backup heat and a thermostat compatible with a heat pump.
- Commissioning 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.
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 HSH4 Premium | 4 Tons - 48,000 BTU (Air Handler FJMA4X) - R410A. We assess the home room by room and confirm the right size and your grant eligibility before signing.
Offered while supplies last.
Warranty: 10 years on the compressor, 10 years on parts and 6 years on labor.