Wall-Mounted Heat Pump CONFORTO MHWAL | 12,000 BTU - R410A

A comfortable living and dining room, without relying on baseboards

On the ground floor of a cottage or a semi-detached house, the living room and dining room are where you spend your evenings. They are also the rooms where the baseboards run the most in winter and where the heat is felt the most in summer. The Wall-Mounted Heat Pump CONFORTO MHWAL | 12,000 BTU - R410A takes care of these daytime rooms with a single wall head, in heating as well as cooling.

Its certified ratings are 25.5 SEER2, 14.0 EER2 and 10.4 HSPF2. The system is ENERGY STAR certified with the cold-climate designation under ENERGY STAR ID 2495084. It qualifies for a $1,200 LogisVert grant.

The daytime rooms of a house

A nominal capacity of 12,000 BTU/h typically suits a living room and dining room that open onto each other, or a spacious living room with an office corner. In a multi-storey house, this head covers the ground-floor living areas, while the upstairs bedrooms keep their baseboards or get their own heads later. It is a way to start with the rooms that matter most for the bill and for comfort. If you plan to add heads upstairs later, tell us at the first visit: it can influence the location of the outdoor unit and the line route.

The calculation still depends on the house. A large picture window, an open staircase that lets heat rise, a kitchen without a partition or older insulation can change the result. We run a load calculation during the visit and tell you whether this size covers the space well or whether another configuration would be better.

At -15 °C, the full nominal capacity

The certificate lists 10,000 BTU/h at -8 °C (17 °F), about 83% of nominal capacity, with a COP of 2.40, and 12,000 BTU/h at -15 °C (5 °F), about 100%, with a COP of 1.80. The two points are measured separately; we report each one as published, even though the -15 °C value is higher than the -8 °C value.

What these figures say is that the variable-speed compressor can deliver its full nominal capacity in January cold. For the daytime rooms of a well-insulated house, the heat pump becomes the main heat source; the baseboards, set a few degrees lower, only serve as backup during cold peaks. The ENERGY STAR cold-climate designation confirms that the pairing was evaluated for this climate.

Heat that feels different

A baseboard heats the air under the window; the warm air rises to the ceiling and comes down slowly. You often end up with a warm ceiling and cold feet. The wall-mounted heat pump circulates the air of the whole room at low airflow: heat is spread more evenly, and the compressor adjusts its speed continuously instead of switching on and off. In the evening, when you sit for a long time in front of the TV or at the table, this stability makes a clear difference.

The $1,200 LogisVert grant

The system is listed in Hydro-Québec's LogisVert program, with $1,200 for the owner of an existing home, according to the list in effect on the installation date. 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.

Summer on the ground floor

In cooling mode, the nominal capacity is 12,000 BTU/h. The 14.0 EER2 rating measures efficiency on a hot day, when the late-afternoon sun comes through the living-room windows and the kitchen adds its heat at dinnertime. The SEER2 rating, for its part, sums up efficiency over the whole season.

Dehumidification is part of summer comfort. At low speed, the indoor coil stays cold long enough to condense moisture from the air, which drains away. The living room stays pleasant at a reasonable set point, with no muggy air and no icy draft.

Inverter and R-410A refrigerant

The heat pump moves heat: in winter, it draws it from the outdoor air; in summer, it rejects the house's heat outside. Inverter technology varies the compressor's speed to follow demand, instead of running all-or-nothing. The circuit uses R-410A refrigerant, in use for many years and well known to refrigeration technicians; service and common parts are easy to obtain.

In cold, humid weather, frost forms on the outdoor coil. The heat pump then starts a short defrost cycle: heating pauses for a few minutes, a cloud of white vapour may rise from the outdoor unit, then everything resumes normally.

What SEER2, EER2, HSPF2 and COP measure

• SEER2 of 25.5: cooling efficiency over the whole summer.
• EER2 of 14.0: cooling efficiency at the hottest point.
• HSPF2 of 10.4: heating efficiency over the whole season, the one that matters most in Quebec.
• COP of 2.40 at -8 °C and 1.80 at -15 °C: heat delivered per unit of electricity, compared with one for one for an electric baseboard.

These figures come from certificate AHRI 210605803, published by NEEP.

Installation, step by step

Choosing the wall for the head

In a multi-storey house, the head's location is decided with the staircase in mind. Warm air rises: a head placed too close to the stairwell sends part of its heat upstairs. Cold air falls: in summer, the upper floor gets little benefit from ground-floor cooling. So we choose a wall that covers the living and dining rooms, up high, secured to the framing with a drainage slope for condensate.

Furniture matters too. We avoid placing the head above a TV, a fireplace or a heat source that would skew the temperature reading, and we leave enough clearance at the ceiling for air return. The airflow should pass above the sofa and the table, not directly on the people sitting there.

The outdoor unit and the line route

The outdoor unit goes on a ground or wall stand, above the snow line, often on the side or at the back of the house, away from bedroom windows, including the neighbours'. We avoid spots where snow slides off the roof and passages where defrost water could freeze. The refrigerant lines, the cable and the drain go through a single sealed opening, and a line cover can finish the run.

Dedicated circuit and commissioning

The system needs a dedicated circuit: we check the panel capacity during the visit. At commissioning, the circuit is evacuated and checked for tightness, then we test heating, cooling and the drain. We also set the baseboard thermostats with you so they stay as backup.

Maintenance

Rinse the indoor filters every two weeks in season, keep the outdoor unit clear of snow and leaves, and plan annual HVAC maintenance of the coils, drain and electrical connections. In winter, white vapour during defrost and a short pause in heating are normal. Our cleaning service takes over when you prefer to hand off the annual visit.

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 Wall-Mounted Heat Pump CONFORTO MHWAL | 12,000 BTU - R410A. We assess your daytime rooms and confirm the right size and your grant eligibility before signing.