An HVAC installation designed for urban areas: performance, discretion and durability on brick walls
At AirGreen , we optimize each HVAC installation to integrate seamlessly with the realities of Montreal plexes. In this project in Rosemont–La Petite-Patrie , our team installed a Gree wall-mounted heat pump (R-32 range) in the backyard of a brick duplex, under a wooden awning. The goal: to provide four-season comfort while preserving the building's aesthetics, occupant safety, and equipment longevity.
Building context and comfort objectives
Rosemont's two-story brick houses present recurring constraints: rear access via a gallery, sometimes limited air circulation on the ground floor, the need to limit noise pollution for neighbors, and careful management of openings in the masonry. The client wanted:
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An energy-efficient heating and cooling solution for living rooms and bedrooms.
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A clean and durable visual integration on the brick.
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An elevated installation to free up terrace space and protect the unit from shocks, snow and debris.
Machine choice: Gree, new generation with R-32 refrigerant
We favor Gree's R-32 range for its high efficiency, reliability in cold climates and reduced environmental impact (GWP lower than R-410A). Typical capacities range from 9,000 to 24,000 BTU , allowing the power to be precisely adapted to the actual thermal load of the home.
Key technical assets:
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DC inverter : fine modulation, energy savings in mid-season.
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Robust winter performance (down to approx. −25°C depending on the version), ideal for Montreal and Laval.
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Silent operation to preserve the tranquility of the backyard.
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Compatibility with grant programs when efficiency criteria are met.
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R-32 : new generation, more efficient refrigerant.
Brick wall integration: precision and AirGreen method
Installing a condenser on a brick wall requires careful planning. Our approach combines building mechanics with adherence to masonry standards.
Fixing and structure:
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Reinforced wall brackets with anchors suitable for solid brick; center distance control to distribute the load.
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Anti-vibration pads under the base to limit structural transmissions towards the interior.
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Peripheral clearance respected for air recirculation and maintenance.
Positioning:
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Raised height under the awning: protects against snow accumulation, reduces the risk of vandalism and facilitates the drainage of defrosting condensate.
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Clear orientation : free face for optimal heat evacuation even in very hot weather.
Drilling and sealing:
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Calibrated drilling with controlled slope, vapor barrier and waterproof sealing to prevent water infiltration and thermal bridges.
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Edge treatment to preserve joints and brick facing.
Refrigeration and electrical routing: cleanliness and serviceability
The longevity of a heat pump depends as much on the equipment as on the quality of the routing.
Refrigerant lines and capping:
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Rigid vertical formwork in brown to match the facade; it protects the insulation, copper and communication cable from UV rays and impacts.
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Respected curvature radii , absence of mechanical constraints and anti-floating collars.
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Braising/welding and deep vacuuming compliant, dehydration of lines before commissioning.
Power supply:
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Clean metal conduit to a sealed outdoor disconnect box ; circuit identification at the main panel.
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Waterproof drip loop and cable glands to counter runoff water under the awning.
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Calibrate the circuit breaker according to the Gree rating label; check the voltage drop over the actual length.
Acoustic management and neighborhood comfort
The Rosemont backyard is a living space. We limit the noise perceived by:
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Anti-vibration decoupling , tightening to the prescribed torque.
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Setting “Quiet” mode when available for parties.
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Height and setback avoiding direct acoustic reflection towards the terrace.
Result: discreet operation that preserves the conviviality of the courtyard.
Interior: wall head and air distribution
On the interior side, the wall-mounted headboard is positioned to serve both the living area and the hallway leading to the bedrooms. This placement promotes:
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Reduced stratification between parts.
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Efficient sweeping in air conditioning mode, with destratification in heating.
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Gravity drainage of condensates, reducing maintenance (no pump).
Safety, compliance and finishes
We deliver projects that inspire confidence at first glance:
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Nitrogen pressurization and leak tests before opening the valves.
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Commissioning with measurements (pressure, superheat/subcooling according to manufacturer's protocol).
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Finishes : bulkheads, caps, stainless steel screws, alignments; everything is designed to last.
Measurable outcome for the occupant
From the first week of use, the customer obtains:
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Significant temperature stability between day and night.
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Lower consumption compared to a portable air conditioner and electric convectors.
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Superior acoustic comfort , even at low speeds.
Points of attention for Montreal plexes (practical advice)
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Minimum condenser height : aim for > 30–45 cm above the snow line; in backyards, elevated installation remains the safest option.
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Distance from corners and railings : avoid hot air being returned under the awning in summer.
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Management of defrost water in winter: provide a flow without disturbing the staircase or passageway.
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Annual HVAC maintenance : cleaning exchangers, checking connections, inspecting supports and capping.
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Pre-wiring for second zone (if needed in the future): anticipate a possible MultiZone heat pump for the upper floor.
Grants and Eligibility
Gree's new generation R-32 wall-mounted heat pumps may be eligible for programs when seasonal efficiency thresholds are met and the installation meets the requirements (qualified professional, approved devices). We support our clients in Greater Montreal (Montreal, Laval , Longueuil , North Shore , South Shore ) in preparing their files.
AirGreen Commitment: careful signature from quote to maintenance
We deliver reliable, clean and optimized systems:
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Sizing advice according to the envelope and uses.
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Documented and guaranteed RBQ installation .
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Scheduled HVAC maintenance to maintain performance season after season.
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Local and responsive customer support for any adjustments.
Conclusion
This Gree wall-mounted heat pump installation (R-32) in Rosemont–La Petite-Patrie demonstrates our expertise in urban brick settings: discreet integration , sustainable technical choices , and four-season comfort perfectly suited to Montreal plexes. For a similar project in Montreal, Laval , Longueuil , on the North Shore or the South Shore , our team will guide you from study to commissioning—and beyond.