A neat, discreet and sustainable project: our team optimizes the comfort of a Laval home with an HVAC system perfectly integrated into the masonry and ready for the winters of Greater Montreal.
An intervention designed for real life north of the river
At AirGreen , we prioritize clean, robust, and easy-to-maintain installations. In Sainte-Dorothée (Laval) , we are commissioning a recent GREE wall-mounted heat pump with R-32 refrigerant , chosen for its high seasonal efficiency and stable heating in cold weather. The result: precise comfort, measurable energy savings, and a preserved facade.
The residential context
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Single-family brick house with side driveway.
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Need for efficient heating at low temperatures and quiet air conditioning in summer.
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Priority given to exterior aesthetics and minimal pipe routing.
Why a GREE R-32 for this project in Laval?
Performance and efficiency
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Inverter compressor ensuring fine modulation of power.
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High seasonal efficiencies (SEER/HSPSF according to R-32 range) to reduce consumption.
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Stable operation in heating mode during the cold weather in Laval thanks to optimized defrosting algorithms.
Environment and Compliance
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R-32 : lower warming potential than R-410A, lower charge for equal performance.
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Equipment compatible with current Quebec market requirements and best practices in HVAC maintenance .
Brand reliability
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GREE is a benchmark in residential wall-mounted heat pumps , with a parts network available locally.
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Protected electronics and housing design for easy access for maintenance.
Facility architecture: cleanliness of the routes and longevity
Link path and integration into the brick
We group the refrigeration lines, drain and communication cable in a vertical capping in a brown color coordinated with the downspout, for a neutral visual reading. The single piercing is made through the brick with a sleeve and vapor barrier to ensure watertightness. The route is short (≈ 1.5–2.0 m) , guaranteeing minimal losses and precise control of superheating/subcooling.
Outdoor unit: clearances and support
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GREE condenser fixed at a height allowing:
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a safe snow guard ,
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sufficient rear clearance for suction,
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a natural drainage of defrost water away from the brick.
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Robust wall brackets (galvanized steel), anti-vibration pads to prevent the transmission of vibrations.
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Free clearance in front of the fan for horizontal blowing , away from traffic areas.
Power supply and protections
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External disconnection box installed in the immediate vicinity, at service height.
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Compliant electrical conduit, UV-resistant cable , and dedicated circuit breaker for the interior panel.
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Validated grounding and current checks upon commissioning.
Commissioning steps
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Flaring and torques tightened on the dynamometer.
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Deep vacuum (< 500 microns) with resistance test.
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R-32 fluid opening and factory charge check according to actual length.
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Functional tests: delta-T in cold/heat, compressor intensity, communication, defrosting.
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Acoustic validation and usage advice to the customer.
What the owner sees and feels
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Uniform comfort in the rooms served, without overheating or drafts.
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External noise controlled thanks to buffers and positioning away from immediate reflective surfaces.
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Respected facade : the brown capping aligns with the aesthetics of the red brick , and the wall lamp remains clear.
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Quick maintenance access : disconnects and connections visible and secure, without unnecessary disassembly.
Choosing the right BTU capacity in Laval: our method
Sizing isn't just about 'bigger is better'. We consider:
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Envelope (insulation, waterproofing, orientation).
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Volumes actually conditioned by the wall head.
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Occupation profiles (day/night, teleworking).
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Thermostratification in open areas.
Objective: a fair capacity, capable of maintaining the setpoint at -20 to -25°C depending on the range chosen, without short cycles or overconsumption.
HVAC Maintenance: Maintaining Performance Throughout the Seasons
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Washable inner head filter : gentle vacuuming every 4–6 weeks during use.
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External heat exchanger : gently rinse if necessary; avoid aggressive cleaners on aluminum.
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Snow/ice clearance in winter around the unit.
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Annual inspection : electrical check, line temperatures, delta-T, and condition of flares.
Regular maintenance ensures durability and maintains seasonal yields.
Grants and Programs: Where are the R-32 Murals located?
Depending on the GREE range chosen ( extreme cold models and efficiency certifications), the project may be eligible for certain programs in effect in Quebec and Greater Montreal. We guide our clients in documenting the required proof of performance and optimizing the preparation of the file. Our team monitors the evolution of the criteria in order to propose the most advantageous option for Montreal, Laval, Longueuil, North Shore and South Shore .
Good practices and pitfalls to avoid
To do
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Choose a location sheltered from snow drifts thrown from the roof.
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Keep at least 15 cm behind the unit and plenty of clearance in front.
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Provide stable gravity drainage or, if necessary, a quality internal lifting pump.
To avoid
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Too long routes increasing pressure losses.
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Multiple drillings without sleeve or caulking.
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Low support exposed to snow and salt spray.
Result in Sainte-Dorothée: comfort, silence and controlled billing
This HVAC installation illustrates our approach: a compact, meticulously installed GREE R-32 system , perfectly integrated into a brick façade and sized for the constraints of Greater Montreal . The owner benefits from efficient air conditioning in the summer and stable heating in the winter, with simple maintenance and optimized operating costs.
In short - why AirGreen for your project in Laval and surrounding areas
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Local expertise on brick houses and the climatic realities of the metropolitan North .
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Careful execution : discreet capping, robust supports, logical paths.
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Complete support : choice of wall-mounted heat pump , sizing, grant procedures, annual HVAC maintenance .
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Rapid intervention in Laval, Montreal, Longueuil, North Shore and South Shore .
Frequently Asked Questions (useful selection)
What is the maximum distance for connections?
We aim for the shortest possible time; beyond the factory charge, a measured top-up may be required according to GREE specifications.
Can the brick get damaged?
No, if the drilling is done with a sleeve , appropriate sealing and vapor barrier. We protect the insulation and fix the brackets in the appropriate joint.
And the noise?
The inverter compressor operates at low speed most of the time; anti-vibration and good clearance limit reverberation.
Next step
We assess your home's layout, suggest the optimal BTU capacity , and deliver an installation that respects your facade and your energy budget. Our team covers Sainte-Dorothée, Fabreville, Vimont, Chomedey , and the entire Greater Montreal area.