A clean and neat HVAC upgrade for a 2-story brick home — quiet, efficient, and exemplary installation
Context: 4-season comfort in an urban area of Montreal
In Rosemont–La Petite-Patrie, the owner of a brick duplex wanted to stabilize the temperature in both summer and winter, without major ductwork. The goal: a recent wall-mounted heat pump with R-32 refrigerant , efficient in cold weather, visually discreet, and well-installed to last. At AirGreen , we recommend a Gree R-32 unit, known for its efficiency and reliability in Montreal residential environments.
Why Gree for this project?
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Energy efficiency : Inverter compressor to finely modulate power and reduce consumption.
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R-32 : lower global warming potential than R-410A, better mass performance.
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Acoustic comfort : low exterior noise level and progressive ventilation profile.
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Parts and service : local availability, ideal for Montreal, Laval , Longueuil , North Shore and South Shore .
Visible installation details (quality keys)
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Installation : condenser placed along a brick wall, under an eave, protected from direct weather and falling ice.
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Support : feet on anti-vibration pads (blue), limiting the transmission of vibrations to the floor and wall.
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Refrigeration path : insulated connections covered in white (vertical capping) for a clean finish and mechanical/UV protection.
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Electricity : power cable secured by metal cable gland and waterproof connection box; dedicated circuit breaker on the panel side.
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Condensate management : gravity route from the interior head (no pump noise and no additional maintenance).
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Estimated connection length : 4 to 6 m between the indoor unit and the condenser, adapted to the load regime and manufacturer limits.
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Clearances : respect the setbacks for air intake/discharge and maintenance access.
Steps of our installation — AirGreen method
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Structural verification and passage plan (brick load-bearing wall, calibrated openings).
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Mounting the inner plate , checking the level and air discharge.
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Single hole with vapor barrier ring; edge protection.
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Installation of refrigerant lines , gentle bending , continuous insulation and capping finish.
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Brazing under nitrogen , dry nitrogen leak testing and deep vacuum drawing .
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Loading according to the chart (adjustment if necessary depending on the length).
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Electrical connection (dedicated circuit, CSA/CEC compliant).
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Start-up and calibration : verification under different regimes, reading of superheating/subcooling.
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Customer discount : usage tips, filter cleaning, creation of the warranty account.
Site challenges and applied solutions
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Limited lateral space along the driveway: we opted for a compact installation under the eaves, while maintaining service clearances.
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Montreal's snow exposure : raised supports with pads , positioning protected from snowdrifts and orientation designed for effective defrosting .
Results observed after commissioning
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Rapid cooling of the ground floor and upper floor, without unpleasant drafts.
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Low exterior noise level ; almost zero vibration thanks to the pads and the alignment of the feet.
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Consumption stabilized by Inverter modulation; savings compared to a traditional air conditioner.
Maintenance recommended to maintain performance
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Indoor unit filters : rinse every 2 to 3 months during use.
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Outdoor battery : gentle hose rinse in spring; snow removal in winter.
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Annual inspection by AirGreen: control of pressures, connections, condensates and cleanliness of exchangers ( HVAC maintenance contract available).
Grants and eligibility (depending on configuration)
Recent high-efficiency R-32 wall-mounted heat pumps may be eligible for certain Quebec programs. Eligibility depends on low-temperature performance and current criteria. We'll check potential assistance for Montreal , Laval , Longueuil , the North Shore , and the South Shore for you.
Usage tips for optimal comfort
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Maintain a stable setpoint (avoid variations >2°C).
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Leave the unit running in Auto/Heat mode in winter to take advantage of modulation.
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Keep one meter free in front of the condenser for airflow and service.
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In case of a storm, free the air intake from snowdrifts .
Why entrust your HVAC installation to AirGreen?
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Local expertise : hundreds of wall-mounted heat pump and air conditioner installations in Greater Montreal.
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Finish : careful line management, aligned capping , clean drilling.
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Complete service : equipment selection, installation, HVAC maintenance , grant assistance and warranty.
Express FAQ
Is this installation suitable for a Montreal brick duplex?
Yes. The mini-split format fits perfectly into duplexes and triplexes, with minimal impact on the facade.
And in winter at -25°C?
Gree 's recent R-32 ranges, which perform well in cold climates, provide reliable heating; we size them according to your actual needs and the building's insulation.
How long does it take to install?
Usually one day , including testing, depending on accessibility and route of the lines.
Are you planning an HVAC installation in Montreal , Laval , Longueuil , on the North Shore or South Shore ? Contact us: we offer you a Gree R-32 solution adapted to your building, installed with the same rigor as that carried out in Rosemont–La Petite-Patrie .