Central Heat Pump CONFORTO MHSD | 5 Tons - 60,000 BTU - R410A

The largest residential size, for homes that truly need it

At 5 tons, a central heat pump reaches the top of the common residential range. This size is not chosen out of caution: it is justified by calculation, and it requires a duct system, an electrical service and an outdoor location to match. The Central Heat Pump CONFORTO MHSD | 5 Tons - 60,000 BTU - R410A pairs the MHSD160DACFC outdoor unit with the MHAH160DACFC indoor unit, an air handler that replaces the furnace and supplies the entire duct system.

Its certified ratings are 15.3 SEER2, 8.8 EER2 and 9.4 HSPF2. The system is ENERGY STAR certified with the cold-climate designation under ENERGY STAR ID 3892550, its certificate still lists capacity at -30 °C, and it qualifies for a $5,040 LogisVert grant.

When a 5-ton system is justified

The 60,000 BTU/h size is meant for very large homes or homes with high heat loss: a large older house in Montreal with high ceilings and many windows, a multigenerational home on three levels, a spacious residence on the South Shore or the North Shore with a fully finished basement.

Before settling on this size, we do a complete load calculation, room by room and floor by floor. Sometimes a home that had a very large unit no longer needs one after insulation work or new windows; sometimes two smaller systems, each with its own zone, serve better than one. An oversized system would short-cycle and cool poorly; a properly sized system runs for long periods at low speed and keeps the house comfortable.

Air return and supply ductwork

The bigger a heat pump, the more air it has to move, and it is often the return that limits the system. An undersized return makes the registers whistle, makes the blower strain and starves the coil of the air it needs. In a home of this size, several returns are often needed, including one upstairs, along with a large filter grille.

On the supply side, we examine the main trunk, the branches to each floor and the rooms at the end of the duct system. Balancing with dampers then lets us divide the air between the basement, the main floor and the upper floor. All necessary corrections are included in the written quote, before signing: an unsuitable duct system would cancel out much of the system's advantages.

Electrical service and backup heat

A 5-ton heat pump and its electric backup represent the largest load in an all-electric home. The outdoor unit needs its dedicated circuit, and the backup, usually housed in the indoor unit, adds a considerable load during deep cold. All of it has to coexist with the range, the water heater, the dryer and, often, an EV charger.

During the visit, we check the capacity of the electrical service and the space in the panel; if an upgrade is needed, it is stated in the quote. We size the backup from the load calculation and, where the equipment allows, set it to come on in stages rather than all at once. The house stays comfortable in deep cold without unnecessary power draw.

Winter according to the certificate

• At -8 °C (17 °F): 42,000 BTU/h, with a COP of 2.60.
• At -15 °C (5 °F): 48,500 BTU/h, with a COP of 1.91, about 81% of the nominal size.
• At -30 °C: 29,900 BTU/h, with a COP of 1.35.

The -8 °C and -15 °C points are measured separately; we report each one as published. These figures come from certificate AHRI 216683753, published by NEEP. COP compares the heat delivered with the electricity used: an electric baseboard has a COP of 1, and this heat pump stays above it down to -30 °C. In a large home, backup heat plays a more visible role during cold snaps; that is why its settings matter so much.

The ratings and cooling

The HSPF2 of 9.4 measures efficiency over the whole heating season, the one that weighs most on the bill. The SEER2 of 15.3 measures cooling efficiency over a typical summer, and the EER2 of 8.8 measures full-load efficiency on a very hot day. That last rating is more modest: the system performs at its best at part load, which covers the vast majority of hours in the year.

In summer, the system cools every room served by the ducts. By running for long periods at low speed, it removes moisture from the air, which keeps a large finished basement drier. Condensate drains from the indoor unit to a floor drain or a pump.

How it works: variable speed and R-410A

The heat pump moves heat instead of producing it. In winter, the R-410A refrigerant captures heat from the outdoor air and brings it to the indoor unit's coil; in summer, a reversing valve flips the cycle. The variable-speed (inverter) compressor adjusts its speed to demand: a system of this size spends most of the year well below its full capacity, and that is the range where it is most efficient.

The $5,040 LogisVert grant

The system is listed in Hydro-Québec's LogisVert program, with $5,040 for the owner of an existing home, according to the list in effect on the installation date. The amount corresponds to the certified pairing of the MHSD160DACFC outdoor unit and the MHAH160DACFC indoor unit.

We confirm eligibility before signing and prepare the detailed invoice, model numbers and proof of payment. Our page on the efficient heat pump grant summarizes the program's conditions.

Installation by AirGreen

A large outdoor unit

The outdoor unit of a 5-ton system is imposing. Its location is chosen with care: a stand or bracket suited to its weight, above the snow line, enough clearance all around for air to circulate, free access for maintenance, and a reasonable distance from bedroom windows and neighbouring lots. Defrost water must be able to drain without forming ice on a walkway or a staircase.

The job

After the visit, the load calculation and the written quote, the furnace is removed and the air handler takes its place, connected to the plenum, the air returns and the condensate drain. The insulated copper line set links the two units; it is brazed, pressure-tested and put under vacuum before the valves are opened. The electrical connection is made on a dedicated circuit, with an outdoor disconnect, and the thermostat is replaced with a model that manages the heat pump and its backup. Commissioning checks the charge, airflow, balancing, defrost and backup heat; we then explain the settings to you.

Maintenance

Check the filter every month in season and replace it according to its format: with airflow of this magnitude, a clogged filter is quickly felt. Keep the outdoor unit clear of snow and leaves, without covering it. Annual HVAC maintenance cleans the coils and checks the condensate drain, the electrical connections and the backup heat. In winter, the white vapour during defrost is normal.

Warranty

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

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 CONFORTO MHSD | 5 Tons - 60,000 BTU - R410A. We assess the home room by room, check the air returns and the electrical service, and confirm that this size is the right one and your grant eligibility before signing.