Ceiling Cassette CONFORTO MHCAS | 12,000 BTU - R410A

Replace the baseboards in a large room without touching the walls

In many homes across Greater Montreal, the finished basement and the living areas are still heated with electric baseboards, installed under windows you would rather keep clear. The Ceiling Cassette CONFORTO MHCAS | 12,000 BTU - R410A takes over from the ceiling. The MHCAS12DACFC cassette is recessed between the joists or into a suspended ceiling and works with the MHSZ112DACFC outdoor unit, whose variable-speed compressor adjusts its speed to the room's needs.

Its certified ratings are 22.3 SEER2, 12.7 EER2 and 10.2 HSPF2. The system is ENERGY STAR certified with the cold-climate designation under ENERGY STAR ID 2495071, its certificate still lists heating capacity at -30 °C, and it qualifies for a $1,188 LogisVert grant.

The finished basement, natural territory for a cassette

The basement brings together every reason to choose a cassette. Its walls are short, often pierced by small high windows, and they already hold the TV, the shelves or the desk. A wall-mounted heat pump fits poorly there: too close to a low ceiling, it blows in your face; behind furniture, it moves the air poorly. The ceiling, on the other hand, is free.

In a finished basement, it is very often suspended. We remove a few tiles, fasten the cassette to the structure above and align its grille with the ceiling grid. The result blends into the room: a square grille among the tiles, with no housing on the walls and no visible lines inside.

The spaces this size covers

The 12,000 BTU size is meant for medium-sized spaces: a basement family room, a home theatre, a playroom or, on the main floor, a kitchen and dining room open to each other when the ceiling allows it. It also suits a professional office or a small waiting room.

Insulation weighs heavily in the calculation. A basement with insulated foundation walls keeps its heat; a basement with bare concrete walls loses much more, and the same unit covers a smaller area there. The load calculation done during the visit settles the question, room by room, before we propose a size.

Replacing the baseboards, without necessarily removing them

The cassette becomes the room's main heating: it works from early fall to late spring, and the baseboards serve only as backup. We recommend keeping them. They take over on the nights of extreme cold, when the heat pump heats at reduced capacity, or during maintenance. Set a few degrees below the cassette's set point, they stay off most of the winter.

In summer, the same cassette provides cooling. A single installation therefore replaces both the supplementary heating and the window or portable air conditioner that came out every July.

What the certificate says about winter

The certificate publishes three heating points, measured separately; we report each one as published.

• 9,900 BTU/h at -8 °C (17 °F), with a COP of 2.55.
• 11,300 BTU/h at -15 °C (5 °F), with a COP of 1.89, or 94 % of the nominal capacity.
• 5,800 BTU/h at -30 °C, with a COP of 1.17, or 48 % of the nominal capacity.

The COP of 2.55 at -8 °C stands out: at this common winter temperature, each unit of electricity used becomes more than two and a half units of heat. At -30 °C, the cassette still heats and remains more efficient than a baseboard, but its capacity drops; that is where the baseboards kept as backup play their part.

Basement humidity in summer

A basement is often cooler than the rest of the house, but more humid. In cooling mode, the cassette removes that moisture: the air passes over the cold coil, the water vapour condenses on it and flows out through the drain. The variable-speed compressor allows long cycles at low speed, the ones that dry the air best, rather than short bursts of cold air.

To be frank, the cassette dries the air when it is cooling. In spring and fall, when the basement is cool but damp, a dehumidifier is sometimes still useful. We bring it up during the visit if we see signs of moisture.

A ceiling that spreads air in four directions

Placed toward the centre of the room, the cassette blows through the louvres around its grille, in four directions. In a long room, typical of basements, we place it so as to reach both ends; in an open area, between the living zones rather than above the sofa. In heating, warm air tends to stay high, hence the importance of the central position and the louvre setting to bring it back toward the floor. In cooling, the cool air comes down on its own.

The technology: variable speed and R-410A

A heat pump moves heat instead of producing it with a resistance element. In winter, the refrigerant captures heat from the outdoor air, the compressor concentrates it and the cassette distributes it; in summer, the cycle reverses and the room's heat is rejected outdoors. The variable-speed compressor avoids abrupt starts and holds a steady temperature.

The system uses R-410A, a refrigerant well known to technicians and found in a large share of the heat pumps installed in recent years. Servicing it is routine; what matters is a tight installation, careful evacuation and a verified charge.

Reading the certified ratings

The SEER2 of 22.3 measures seasonal cooling efficiency: the higher it is, the less the unit uses for the same cooling over a whole summer. The EER2 of 12.7 measures efficiency in hot weather, when the unit runs at full load. The HSPF2 of 10.2 measures seasonal heating efficiency, but for a reference climate milder than Quebec's: it lets you compare models without predicting your bill.

For our winters, the COP values published at -8 °C and -15 °C are more telling. An electric baseboard has a COP of 1; anything above 1 is heat drawn from the outdoor air rather than paid for at the meter. The actual bill then depends on insulation, settings and the winter itself.

The $1,188 LogisVert grant

The system is listed in Hydro-Québec's LogisVert program, with $1,188 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.

A clean installation in a finished ceiling

The cassette is installed between the joists, keeping access to the filter and drain. In a suspended ceiling, only a few tiles are removed; in a drywall ceiling, we cut a clean opening that the grille covers.

• Refrigerant lines. In the basement, they follow the joist cavity to the outside wall and exit through a single sealed opening, above the foundation. A line cover can finish the outdoor run.
• Condensate drain. It follows a continuous slope to the outside or to a suitable discharge point; if the route does not allow a slope, a small pump takes care of it.
• Outdoor unit. On a wall bracket or a stand, above the snow line, clear of roof runoff and away from bedroom windows, including the neighbours'.
• Electrical. The system needs a dedicated circuit: we check the panel capacity during the visit.
• Commissioning. Leak test, evacuation, checks in heating and cooling, then a demonstration of the settings and filter cleaning.

Maintenance

Rinse the filter behind the grille every two weeks in season; in a basement, where dust builds up quickly, this habit matters. 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 Ceiling Cassette CONFORTO MHCAS | 12,000 BTU - R410A. We assess the room and its insulation and confirm the right size and your LogisVert grant eligibility before signing.