Four-season comfort, discreet design and measurable performance in a condo in Southwest Montreal
At AirGreen , we have just completed the HVAC installation of a TOSOT wall-mounted heat pump (R32 Series, 12,000 BTU) in a bright condo in the Southwest . The indoor unit, with its sleek profile and digital display (22°C in heating mode), fits just above the window casing without encroaching on the travel of the shades. The result: even diffusion , controlled noise and a minimalist aesthetic perfectly suited to a modern urban space.
Client context and objectives
The owner was looking for a solution:
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Quiet in the evening for open plan living room-kitchen;
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Efficient in heating in very cold weather, without oversizing;
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Visually sober , compatible with a light wall and rows of blinds;
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Cost-effective to use , with controlled consumption and simple maintenance.
After a quick thermal analysis of the envelope (glazed surface, orientation, sealing), we selected 12,000 BTU in a wall-mounted heat pump : sufficient for the main area while providing a power reserve for harsher days.
Why TOSOT (by Gree) – R32 Series
The R32 Series from TOSOT (a Gree group brand) combines key advantages for Montreal residential customers:
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R-32 refrigerant : better volumetric efficiency and reduced footprint compared to R-410A;
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Inverter technology : fine modulation, extended cycles and temperature stability ;
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Low temperature heating mode : maintains capacity when the mercury drops;
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Low interior noise , ideal for condos;
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Wi-Fi/wall control (depending on option), for programming and optimization.
In this configuration, the device easily covers summer air conditioning needs and provides efficient additional heating during the off-season and winter, reducing dependence on electrical backup systems.
Interior layout: precision and symmetry
We fix the head high on the load-bearing wall , centered on the axis of the room to avoid dead zones . Points of attention:
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Superior clearance maintained for reliable probe reading and easy maintenance;
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Shutter and deflectors adjusted to push air under the roof overhang towards the living area, without blowing directly onto the occupants;
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Window clearance management : the unit remains out of the blinds' operating plane.
Drainage is gravity-based , with a continuous slope towards the outside: no condensate pump, therefore less maintenance and zero additional noise .
Refrigeration and exterior aesthetics
In a condo in the Southwest , the optimal solution remains the short “back-to-back” route :
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Single hole behind the head, diameter adapted to the insulation of the connections;
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Short line length (≈ 2.5–3.5 m), favorable to COP ;
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Discreet white capping on the outside (head height on balcony), careful waterproofing on the wall;
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Condenser on anti-vibration brackets , clearance around the grilles respected for air flow.
We install a Code-compliant outdoor disconnect switch and a dedicated 240V circuit (sized according to the appliance nameplate), with grounding and labeling at the panel.
Commissioning: AirGreen method
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Deep vacuum draw up to the recommended threshold; vacuum resistance verified;
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Refrigerant release and leak checks (listening, foam, pressure gauge);
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Verification of intensities and monitoring of delta T in cold and heat;
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Blowing calibration (auto speed then fine-tuning) to limit stratification;
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User brief : filters, seasonal settings, useful modes (Auto, Heat, Dry).
Challenges and solutions encountered
Height above window
The lintel constrains the upper screws: we use suitable anchors and a perfectly leveled plate to eliminate any vibration.
Condensate management during wet periods
To avoid “gurgling” in the drain, we provide a slight air gap and an anti-reflux elbow , then test the flow rate with simulated water load.
Potential noise pollution on the balcony
Consoles with silent blocks , torque tightening, and sufficient clearance between the cover and the masonry: the outdoor unit remains very discreet for the neighbors.
Results measured in the condo
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Stability at 22°C (digital display) without perceptible oscillation;
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Very low ambient noise (normal conversation not disturbed);
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Responsiveness : 1–2°C drop in less than 15 minutes in cooling mode on the open area;
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Efficient additional heating on cool mornings, with reduced consumption thanks to the inverter.
HVAC Maintenance: Simple Schedule, Maximum Longevity
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Dust sources : vacuum the pre-filter every 4–6 weeks during heavy use;
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Battery : gentle cleaning as needed, without damaging the fins;
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Outdoor condenser : clear leaves and dust, check clearances;
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Annual inspection by AirGreen: pressures, intensities, probes, tightening, parameter updates.
Regular professional maintenance protects the compressor and maintains performance in both summer and winter.
Grants and local compliance
High-efficiency wall-mounted heat pumps like this TOSOT R32 Series are often eligible for provincial programs when Energy Star and low-temperature performance criteria are met. We systematically verify eligibility and guide our customers through the process . Installation is carried out according to Quebec standards , with certification of R-32 refrigerant handled by certified technicians .
Tips for maximizing savings
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In summer, Auto or Cool mode with a setpoint of 23–24°C prevents overcooling and residual humidity;
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In winter, Heat mode with vertical sweep to reduce stratification;
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Open doors in the main area to distribute air, and low speeds in the evening for silence;
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Program the setpoint reduction in absence, gradually raise it before returning.
What this installation says about our approach
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Calibrated solution , not oversized: real comfort and optimized COP ;
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Short refrigeration path : minimized losses, better reliability;
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Careful finishing (alignments, capping, sealing): aesthetics and durability;
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Customer follow-up : maintenance reminders, seasonal advice, local after-sales service.
AirGreen in Greater Montreal
We support owners and managers in Montreal , Laval , Longueuil , on the North Shore and the South Shore for projects involving heat pumps , wall-mounted air conditioners , multi-zone systems and HVAC maintenance . Each project is treated with the same high standards: precise diagnosis , clean installation , rigorous commissioning , and long-lasting support .
In summary - the strengths of the installed TOSOT R32 Series
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12,000 BTUs perfectly sized for a Southwest condo;
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R-32 + Inverter : increased efficiency and controlled bills ;
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Reliable heating in cold weather, rapid cooling in summer;
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Silence and integration above the window, without disturbing the blinds;
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Simple maintenance , accessible parts and gravity drainage route.
For a similar heat pump or wall-mounted air conditioner project , our team travels quickly throughout Greater Montreal with solutions adapted to your building, your comfort and your budget.