Controlled winter comfort and cool summer: an exemplary HVAC installation by AirGreen
In this family home in Fabreville (Laval) , our client was looking for a compact system capable of providing primary heating in spring/fall, reliable backup in the middle of winter, and quiet cooling during heat waves. The house is typical of Laval 's residential areas: vinyl siding, partially above-ground basement, side driveway, high windows on the ground floor. We are proposing a latest generation Gree wall-mounted heat pump with R-32 refrigerant , sized for an open living area on the ground floor and a bedroom upstairs.
Why an R-32 wall-mounted heat pump here?
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High Seasonal Efficiency : Gree R-32 wall units boast higher SEER/HSPF than older R-410A systems while reducing the environmental footprint.
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Extreme cold : recent ranges maintain useful capacity in negative temperatures, which is suitable for the climate of Montreal–Laval–North Shore .
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Compact and discreet : no main duct to modify; perfect for an existing house.
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Program eligibility : depending on the configuration chosen (efficiency and operating range), these units are generally eligible for current Quebec subsidies .
Technical study and site preparation
Interior/exterior survey
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Route : the interior head is positioned upstairs, side facade. We choose an exterior vertical path with a white capping which joins the unit through a single 65 mm drilling.
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Connection length : approximately 3 to 4 m of refrigeration, ideal for limiting pressure losses and facilitating maintenance.
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Condensate management : gravity drain with continuous slope; no pump noise, less maintenance.
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Electrical : Outdoor disconnect box mounted near the condenser, dedicated power supply compliant with Code, circuit breaker sized according to the equipment's current rating.
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Outdoor installation : Condenser on galvanized wall brackets approximately 45–50 cm above the finished floor. This clearance protects against snow accumulation and facilitates winter snow removal.
Site constraints and AirGreen responses
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Vinyl facade and basement window : we chose to anchor in the structural studs and respected the clearances around the opening to avoid any resonance or infiltration.
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Narrow aisle : To save space, we use vertically covered wiring and connections , tight to the wall, with wide bends to optimize refrigerant flow and aesthetics.
Unit sizing and selection
Power and configuration
For a living area of approximately 40–55 m² , we recommend a Gree R-32 wall-mounted heat pump with an output of ≈ 12,000 BTU . This power offers an excellent compromise between temperature increase and dehumidification in air conditioning mode, while maintaining a low noise level .
Selection criteria retained
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Inverter compressor for precise setpoint maintenance.
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Extreme cold operation (negative range) for Laval and the North Shore .
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Multi-stage filtration for better air quality.
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Optimized defrosting limiting cycles and consumption in the middle of winter.
Installation process (1 day, dust-free)
Key steps
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Surface protection : interior tarpaulins, dust protection at the piercing, traffic mats.
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Drilling and sealing : insulated conduit, vapor barrier respected, sealed bulkhead .
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Installation of the inner head : alignment template, level check, blowing test.
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Installation of the condenser : anti-vibration brackets , stainless steel bolts, silent blocks .
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Refrigeration connections : calibrated flares, tightening torque with a dynamometer, deep vacuum (≤ 500 microns) and nitrogen leak test.
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Electrical connections : external disconnection and approved armored cable; labeling on panel.
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Commissioning : checking currents, superheat/subcooling, and warranty registration .
Finish and aesthetics
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White capping matching the woodwork for discreet integration.
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Drip directed away from traffic.
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Tight routing to clear the aisle and avoid collisions.
Measured results and customer experience
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Stable temperature on the ground floor and upstairs, with reduced differences between rooms.
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Low exterior noise level : the machine remains barely audible from the sidewalk.
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Controlled humidity in summer thanks to the intelligent dehumidification mode.
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Consumption : the inverter compressor adjusts the power; the customer is already noticing a reduction in the operating hours of his electric baseboards.
Recommended HVAC maintenance
What we program with each AirGreen client
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Cleaning the filters (once a month in summer, 2–3 months otherwise).
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Gentle washing of the evaporator and rinsing of the condenser in spring.
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Annual inspection : operating pressure, connections, condensate, electrical tightening.
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Winter clearance : keep 30 cm free around the condenser; clear snow from under the unit.
Grants and Compliance
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High-efficiency R-32 wall-mounted heat pumps like this Gree are generally eligible for active grant programs in Quebec, based on capacity and low-temperature performance. We assist our clients in Montreal, Laval, Longueuil, the North Shore, and the South Shore in preparing files (photos, detailed invoices, and certification numbers).
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Electrical compliance : visible exterior disconnection , appropriate circuit breaker rating, panel marking. All our work complies with RBQ requirements and industry standards.
Pitfalls to avoid (AirGreen feedback)
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Condenser too low : In Greater Montreal, a ground-level installation often ends up buried. Raising the unit on brackets protects the unit and ensures efficient defrosting.
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Uncapped connections : Over the seasons, exposed insulation deteriorates. Capping extends its lifespan and improves its appearance.
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Drain without slope : Poor drainage causes seepage and odors. We always draw a continuous slope and validate the flow.
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Undersizing : Choosing 9,000 BTU “to save money” can result in a machine that runs full blast all the time. Here, ≈ 12,000 BTU is the happy medium.
Why choose AirGreen for your installation in Laval and Greater Montreal?
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Local HVAC expertise : we install and maintain heat pumps in Laval, Montreal, Longueuil, North Shore and South Shore with an advisory and measurement approach.
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Aesthetics and durability : careful alignments, galvanized brackets , materials resistant to the Quebec climate.
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After-sales service : maintenance reminders, peak availability, guaranteed parts and labor.
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Transparency : clear quotes (model, BTU , output), end-of-construction photos, assistance with subsidies .
In summary
This Gree R-32 wall-mounted heat pump installation in Fabreville (Laval) showcases clean execution: white vertical capping , wall brackets , compliant electrical disconnection and silent gravity drain . The result: four-season comfort and tangible energy savings , all with a finish that respects the local residential architecture. For a similar project in Laval, Montreal, Longueuil, North Shore or South Shore , our team travels, sizes and installs according to the rules of the art .