Precise and discreet comfort for a typical Rosemont condo, with a perfectly integrated interior head and a refrigeration path optimized for demanding Montreal winters.
A project serving comfort and aesthetics
At AirGreen , we favor HVAC installations that integrate with the interior architecture without compromising on performance. Here, the GREE wall-mounted head is positioned high up, in the corner near a bay window overlooking a brick facade. This configuration allows us to:
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limit the length of refrigerant connections;
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ensure reliable gravity drainage ;
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reduce pressure losses and the perceived noise level in the room;
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maintain a clean aesthetic with a discreet light-colored hood .
The result: a wall-mounted air conditioner/heat pump that is visually invisible, while maintaining a stable temperature, summer and winter.
Why a GREE wall-mounted heat pump (R32 range)?
GREE's recent R-32 range offers:
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a lower GWP refrigerant than R-410A;
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better seasonal efficiency (SEER/HSPF) at equivalent power;
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stable performance in cold weather , suitable for Greater Montreal ;
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modern electronics facilitating precise blower control and compressor modulation.
In this project, the client's goal was threefold: quiet air conditioning in the summer, supplemental heating in the mid-season to reduce the use of the main system, and controlled consumption. The heat pump meets these three expectations, while also opening the door to potential subsidies when recognized efficiency criteria are met.
Part analysis and sizing criteria
Before any installation, we assess:
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Volumes and solar gains : large glazed surface facing laterally; variable loads depending on the sunshine.
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Waterproofing and insulation : contemporary condo, limited air infiltration but solar gains to be considered.
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Acoustics : need for quiet operation at low revs.
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Technical route : exterior wall directly available behind the head; single, short crossing to the outside.
This context leads to favoring a power adapted to the open living room (often 9,000 to 12,000 BTU for this type of space), with sufficient margin to avoid short cycles and take advantage of modulation. We validate the refrigeration load according to the length of lines and the elbows actually installed.
Layout and installation details
Inner head positioning
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High height to promote layering and even sweeping.
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Optimized side clearance so that the blower flap covers the entire living area without blowing directly onto the occupants.
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Easy access for HVAC maintenance : filter washing, exchanger inspection, condensate tray cleaning.
Drilling and evacuation of condensates
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Wall penetration behind the unit, with slight slope towards the outside (gravity drainage, no pump required).
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Waterproof sleeve and continuous insulation to eliminate the risk of internal condensation.
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Neutral exterior silicone for a long-lasting finish against water and frost.
Liaisons and capping
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Insulated copper connections, short length (typically < 5 m in this case), reducing losses and quantity of refrigerant.
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Discreet exterior casing to match the color of the coatings; anti-corrosion mechanical fixing.
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Connections brazed under nitrogen and deep vacuum (≤ 300 microns) with leak test.
Power supply and protections
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Dedicated circuit with circuit breaker compliant with the appliance rating; cable section sized according to the nameplate.
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Proximity circuit breaker (disconnect) near the outdoor (out-of-field) condenser, as required by code.
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Grounding checked, tightenings checked to the torque .
Commissioning and adjustments
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Weighing of refrigerant if required addition according to actual length.
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Setting the ventilation speeds and sweeping to avoid any direct air flow on the seats.
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Checking the blowing temperatures in cooling and heating mode, controlling the intensities and pressures.
Actual comfort: what the occupant perceives
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Quiet at low speed: the wall head maintains the temperature smoothly.
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Even diffusion : the blowing angle avoids cold areas near the windows.
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Responsiveness : Compressor/fan modulation quickly stabilizes the atmosphere.
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Simple control : remote control and Wi-Fi option (depending on the card chosen), useful for programming the return home.
HVAC Maintenance: Maintaining Performance
We provide a simple maintenance plan :
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Clean the filters every 4 to 6 weeks during periods of heavy use.
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Annual inspection by an AirGreen technician: exchanger, condensate tray, pressure switches , probes, tightening, control of refrigeration parameters.
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Gentle cleaning of the fins and checking of the external capping after winter.
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Clearance around the condenser (leaves, snow) to maintain airflow and heating capacity.
Regular maintenance increases lifespan, ensures stable consumption and minimizes odors related to humidity.
What to avoid when installing a wall mount
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Undersize the device: rapid cycles, noise, discomfort.
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Oversize : unstable temperature and insufficient dehumidification in summer.
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Position the head facing a nearby obstacle (falling beam, niche) which disrupts the sweep .
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Drilling without slope or correct vapor barrier → risk of drips, marks on the wall.
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Neglecting vacuum and leak testing.
Our teams apply strict procedures to ensure that this does not happen.
Cold weather in Montreal: points of attention
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Choice of an R-32 range designed for the local climate.
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Defrosting optimized by the electronic card; advice for use in very cold weather (maintaining a realistic set temperature).
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Outdoor installation protected from snowdrifts; suitable support (wall or slab) with clearance under the unit for the flow of defrost water.
Subsidies and energy efficiency
In the Montreal, Laval, Longueuil, North Shore and South Shore regions , several programs encourage high-efficiency heat pumps . When the SEER/HSPF values and low-temperature performance meet current criteria, part of the project can be upgraded . We support our clients in:
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check eligibility ;
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prepare documents (detailed invoice, proof of performance of the installed range);
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complete the required submission and declaration .
Final result
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A compact, neat and quiet HVAC installation .
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A GREE wall-mounted heat pump (R-32 range) adapted to the volume to be treated.
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Short connections, reliable gravity drainage , simplified maintenance.
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Measurable comfort and low operating costs, summer and winter.
Practical AirGreen Tips for Montreal Homeowners
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Aim for the right power : a correctly sized modular unit is better than excess BTUs.
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Choose R-32 for efficiency and compliance with new generations.
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Think maintenance : an annual appointment protects your investment.
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Keep the exterior clear : Snow and ice are the enemies of airflow.
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Optimize settings : auto-swing mode and low speeds improve perceived comfort.
AirGreen operates throughout Greater Montreal : Montreal , Laval , Longueuil , North Shore and South Shore . Our HVAC expertise covers wall-mounted heat pumps , central heat pumps , multi-zone systems and maintenance . For a clear quote and installation without surprises, we are at your service.
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