Four-season comfort for a brick garage and floor: a neat, quiet installation designed for our winters
In this project, we are modernizing the comfort of a house in Sainte-Dorothée (Laval) with a Gree R-32 series wall-mounted heat pump, chosen for its cold performance, energy efficiency and reliability. The outdoor unit is mounted on wall brackets above a garage door, on a brick facade , with a dedicated outdoor disconnect box and rear passage of the connections for a clean finish. The objective: efficient heating and cooling of an open-plan space adjacent to the garage, while minimizing noise and protecting the equipment from bad weather and shocks.
Client background and objectives
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Building Type : Single-family brick house with garage.
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Needs : to cool down at the height of summer and provide reliable heating support in the off-season and during very cold weather; to reduce energy bills.
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Site constraints : large garage opening, vehicle circulation, clearances to be respected, aesthetics of the facade, resistance to cold Laval/North Shore .
Choosing the right equipment: why choose a Gree R-32 wall-mounted heat pump ?
Gree is one of the leading manufacturers of wall-mounted heat pumps in Quebec. The R-32 platforms offer:
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Better seasonal efficiencies (SEER/SCOP) and reduced refrigerant charge .
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Cold climate performance with low temperature capacity maintenance, ideal for Laval, Montreal, Longueuil , South Shore and North Shore .
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Quiet operation on both the exterior and interior sides.
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Compatibility with energy transition programs when efficiency and operating temperature criteria are met.
For this project, we are choosing a unit capacity adapted to the area served (living room + landing near the garage). The sizing takes into account insulation , orientation , solar gains and the thermal behavior of the adjacent garage.
Outdoor installation: clean, robust, designed for winter
Fixing on wall brackets above the garage
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Height : high to protect against snow mixing , impacts (vehicles, bicycles, garage equipment) and facilitate defrosting flow .
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Vibrations : silent blocks and calibrated tightening to limit transmission to the masonry; discreet operation on the neighboring side.
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Clearances : respect free distances in front of the blower and on the sides; absence of direct obstacles (ramp or guardrail).
Passage of connections and external disconnection
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Short path refrigerant lines (≈ 2–3 m estimated), rear outlet behind the unit for a minimalist brick look .
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Dedicated power supply from the house panel, arriving in a waterproof disconnect box (to the right of the unit) with exterior approved flexible conduit .
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Defrost condensate management : free evacuation outside the passage area; no dripping on the garage door.
Why not a slab on the ground?
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Risk of snowdrifts and frost at the bottom of the wall.
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Exposure to projectiles (gravel, snow shovel, wheels).
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Preserved aesthetics and gain in floor space around the garage entrance.
Interior path and finishing
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Wall-mounted fan positioned to efficiently circulate air in the target area without direct airflow onto the living area.
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Single drilling with waterproof sheath ; insulation of connections and discreet internal capping if required.
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Condensate management by gravity when the configuration allows it; otherwise, silent and easily accessible lifting pump for maintenance.
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Communication and power wiring separated from refrigerant lines for easy diagnosis and maintenance.
AirGreen commissioning and quality controls
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Nitrogen leak test and deep vacuum with micron measurement.
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R-32 charge check according to actual lengths; adjustment if required by manufacturer's specifications.
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Electrical check : tightening, polarities, grounding, conformity of the dedicated circuit breaker .
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Settings : modes, speeds, automatic defrosting, optimization of the heating setpoint to limit the short cycle.
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Performance measurements : blown temperatures, ΔT, intensity, noise; submission of a commissioning report .
Results for the client
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Rapid cooling in summer thanks to high diffusion and the short distance between the head and the space to be treated.
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Stable heating in mid-season; reduced use of main heating.
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Perceptible silence on the garage side and on the neighbor side.
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Preserved brick facade : no visible duct, only the unit on stainless steel supports and a compact disconnect .
HVAC Use and Maintenance Tips
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Keep filters clean (clean every 4–8 weeks depending on dust and animals).
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In winter , clear the area in front of the outdoor unit after snow; do not obstruct the blower .
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Program stable setpoints to maximize performance; avoid temperature yo-yos.
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Carry out annual maintenance : thorough cleaning of the evaporator/condenser, leak check, electrical checks.
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Monitor condensate flow ; abnormal noise or error code = service .
Possible grants and eligibilities
Depending on the exact version of the Gree R-32 series installed (certified efficiencies and cold operating range), provincial programs may apply in Greater Montreal (Montreal, Laval , Longueuil , North Shore , South Shore ). We guide our customers on:
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minimum efficiency criteria ;
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the required documents and proof of installation ;
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optimizing return on investment (energy savings + incentives).
Pitfalls to avoid when installing HVAC on a garage facade
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Insufficient height : exposure to projected snow and melting; risk of fan freezing.
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Too short front clearance **: air recirculation, reduced capacity and premature frosting.
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Absence of disconnect within range**: non-compliance and difficulty of maintenance.
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Unsealed openings : air/water infiltration and thermal bridges.
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Undersizing or oversizing : short cycles, discomfort, wear.
Why AirGreen for your HVAC installation in Greater Montreal?
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Wall-mounted heat pump specialists : expertise in Gree, Midea, Fujitsu, Sharp, etc. brands.
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“Brick facade” approach : mechanical anchors, suitable seals and vibration management .
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Complete service : estimate, design, installation , instrumented commissioning, HVAC maintenance and grant support.
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Coverage : Montreal, Laval, Longueuil, North Shore, South Shore .
Project summary technical sheet
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Type : single-zone wall-mounted heat pump for floor adjacent to the garage.
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Brand : Gree – R-32 platform .
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Installation : wall brackets on brick, above the garage door.
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Power supply : dedicated circuit, external disconnect box .
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Refrigerant path : short (≈ 2–3 m), rear exit; discreet finishes.
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Objectives : 4-season comfort, high efficiency , reduced noise , preserved aesthetics .
And for your home in Montreal, Laval, Longueuil, North Shore or South Shore?
We evaluate the thermal load , the facade constraints , the electricity and your comfort priorities to recommend the most relevant heat pump : Gree (R-32), Midea (Midea28/Midea35), Fujitsu (Altair/Orion), Sharp (ZU1/THU), etc. Our promise: a durable, compliant installation , optimized for the Quebec winter .
Practical tips to extend lifespan
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Keep one meter of clear space in front of the unit all year round.
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Install a snow guard if the roof cladding creates direct runoff into the unit.
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Prefer professional cleaning of the condenser in the spring.
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Have pressure and subcooling values checked every 1–2 years.
Deadlines and typical procedure
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Technical visit (measurements, electrical assessment, anchor points on brick).
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Submission with scenarios (capabilities/finished).
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Installation : 4 to 6 hours in an existing house for a single zone with short run.
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Commissioning and training in use.
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Follow-up : HVAC maintenance reminder and grant assistance.
Need an estimate? We respond quickly in Sainte-Dorothée , Chomedey , Duvernay , Montreal , Longueuil , North Shore and South Shore . A properly sized and properly installed wall-mounted heat pump transforms your comfort while controlling your operating costs.