Careful integration into a brick plex on the Plateau
In the heart of Plateau-Mont-Royal , we installed a Gree wall-mounted heat pump on the rear façade of a typical brick plex. The owner's objective was clear: to obtain reliable heating in winter, efficient air conditioning in summer, and a discreet installation, compatible with the architecture and shared courtyard life. Our proposal: a Gree single-zone inverter , known for its fine modulation, energy efficiency, and reliability in cold climates—a relevant choice for a Montreal home with year-round occupancy.
From the technical visit, we validate the main room to be treated, the orientation of the windows and the insulation. In this type of housing, a capacity of 9,000 to 12,000 BTU is often adequate, but we always size according to real needs: losses, solar gains, occupancy habits. The client wanted to preserve the interior tranquility and avoid visible trunking. We therefore chose a rear passage (back-to-back) so that the connections exit directly behind the interior head, with a gravity drain for minimal maintenance.
The exterior context presented several constraints: a metal spiral staircase , a nearby window , an existing exhaust hood on the wall, and a fence limiting the work area. Clearance and airflow planning are crucial here. Our layout takes into account service distances, possible turbulence created by the staircase, and the risk of recirculating hot or humid air near existing exits.
Technical details and AirGreen best practices
Supports, height and clearances
The Gree condenser is mounted on galvanized wall brackets with anti-vibration pads . We have raised it to stay out of the snow zone and ensure free condensate drainage during winter defrosting. The final position respects the required clearances on the rear and sides, while preventing the flight of stairs from obstructing the suction or blowing. This height also facilitates maintenance and keeps the unit away from floor dirt.
Good AirGreen reflex: when structures are nearby (stairs, railings, balconies), we simulate the air path to avoid recirculation and induced noise. This extends the life of the fans and maintains seasonal efficiency.
Refrigeration path, drain and sealing
The drilling was carried out with a slight slope towards the outside for natural gravity drainage (no pump, therefore less maintenance and noise). The insulated copper connections and the communication cable follow a short route, of approximately 2 to 3 m , limiting pressure losses and the quantity of additional refrigerant. On the outside, we installed a white UV capping with rounded profiles: it protects the insulation, resists bad weather and integrates into the facade. The crossing is filled and sealed (closed-cell foam and weather stripping) to block air and moisture infiltration.
HVAC maintenance tip: In the spring, check that the drain is flowing freely. A clogged drain can cause droplets to enter the system in cold mode.
Electricity and compliance
Power is drawn from a dedicated circuit breaker in the home's electrical panel. Outside, a proximity switch (gray service box) is installed according to the Quebec Electrical Code requirements for technician safety. Cables are sheathed, secured at regular intervals, and connections are tested before power is applied.
Commissioning and refrigerant
After vacuuming and leak testing , we check the total length of the connections to adjust, if necessary, the refrigerant charge beyond the factory charge. We then check the blown/return temperatures , instantaneous consumption , and the Inverter parameters . The start-up is done on a ramp : the machine reaches the setpoint smoothly and stabilizes the temperature with a low noise level, ideal for close proximity to the Plateau.
Management of the immediate environment
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Spiral staircase: We oriented the unit so that the airflow does not directly hit the steps, which prevents resonances and localized frost deposits in winter.
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Neighboring window: remote installation to limit the admission of noise and blown air into the room.
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Existing Air Outlets/Intakes: The unit remains away from exhaust hoods to avoid drawing in humid or hot air from a dryer or range hood, which would increase pressures and decrease efficiencies.
Acoustics and vibrations
In addition to the pads on the brackets, we tightened the compressor mounts to the correct torque and validated the fan balancing . The absence of direct contact with neighboring metal elements prevents solid-borne noise . The result: discreet operation, compatible with the realities of the Plateau's inner courtyard.
Aesthetics and discretion
The owner wanted a clean integration. The capping follows a straight line, the curvature radii are controlled, and no chute appears inside thanks to the rear passage . The visible fixings are stainless , the screws are aligned, and the service box is positioned at an ergonomic height.
Performance, comfort and savings
Gree's inverter technology allows the compressor to finely adjust its speed. Specifically:
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Stable comfort without sudden temperature variations.
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Controlled consumption , especially in mid-season when the machine operates at partial load.
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Silence in steady state, ideal for a living room.
The Energy Star models in this family feature competitive SEER2/HSPF2 ratings and an operating range suited to Montreal winters. Depending on the AHRI matching selected, the installation may be eligible for grants available in Greater Montreal ( Montreal, Laval, Longueuil, North Shore, South Shore ). We validate these criteria in the quote and assist the customer with the administrative process .
Result for the customer
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Reliable heating in cold weather, with optimized defrosting.
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Fast cooling in summer, directed airflow to avoid uncomfortable drafts.
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Reduced electricity bill compared to pure resistive solutions, thanks to Inverter modulation.
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Simplified maintenance : washable filters and easy access to the outdoor unit.
HVAC Maintenance: Recommended Schedule
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Internal filters: monthly inspection during use, cleaning every 4–8 weeks .
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Condenser: keep a clearance of 30–60 cm around it, remove leaves and snow.
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Drain: Check the flow in spring; if the home is very damp, consider checking more frequently.
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Annual AirGreen inspection: exchanger cleaning, pressure monitoring, electrical and sensor inspection. Regular HVAC maintenance maintains efficiency and extends service life.
Common mistakes to avoid
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Install too low : risk of burial under snow and persistent frost.
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Attaching the unit to an obstacle (staircase, return wall): performance losses due to recirculation.
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Sharing the same blowing area with an exhaust hood: recirculated hot humid air = higher static pressure and accelerated wear.
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Neglecting to seal the hole: air infiltration, cold areas and condensation in the wall.
AirGreen process: clear and fast
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Technical visit : measurement, BTU sizing, identification of routes.
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Detailed quote : equipment, HVAC installation , parts, warranties, grant options.
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Installation : site protection, clean drilling, suitable supports, certified connections.
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Commissioning : testing, fine adjustments, usage and maintenance advice.
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Follow-up : Annual HVAC maintenance reminder and assistance if needed.
In summary
This Gree installation in Plateau-Mont-Royal demonstrates our expertise: careful reading of the site, respect for clearances despite a spiral staircase , gravity drain without pump, discreet capping and electrical compliance. The client obtains lasting comfort , energy savings and an orderly rear facade, ready to face winters as well as the heat waves of Greater Montreal .