A compact, neat HVAC installation ready for Montreal winters
Client context and objectives
In a typical brick plex in Rosemont–La Petite-Patrie , our clients wanted a discreet and efficient HVAC solution for four-season comfort, without encroaching on the side driveway or the wooden fence. After load calculations and an electrical inspection, we selected a Sharp wall-mounted heat pump (ZU1 series, R-32 refrigerant, inverter) , a choice perfectly suited to Montreal's urban housing thanks to its high efficiency in cold weather and low noise level.
Why the Sharp ZU1 series for Montreal
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Heating efficiency down to low temperatures, ideal for the metropolitan climate.
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R-32 refrigerant , more efficient and with a lower GWP than the old R-410A.
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Inverter compressor to finely modulate power and reduce consumption.
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Available capacity range (≈ 12,000 to 24,000 BTU) allowing the power to be adjusted to the actual surface area.
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Simple maintenance and easy access to components for annual maintenance.
What we achieved on this project
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Installation of the condenser on galvanized wall brackets with anti-vibration pads: the unit is raised approximately 60 cm from the ground to clear the area of snow and promote air circulation.
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Ultra-short refrigeration path (≈ 2 to 3 m visible), drilled in the front and neatly covered for a clean appearance and excellent performance (less pressure losses).
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Dedicated power supply with external disconnection box and waterproof cable glands; the station is identified and accessible for any intervention.
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Rear and side clearance management : positioning calculated to respect manufacturer clearances, the fence and the side wall.
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Sealing of the drilling with high-performance mastic and continuous insulation of the lines to prevent condensation.
Construction site storytelling: precision in a narrow passage
The site has a narrow side driveway with a meter box nearby. We are planning the implementation in three stages:
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Identification of clearances (fence, masonry, meter) and laser tracing to align the support horizontally;
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Drilling with a slight slope towards the outside for the evacuation of any condensation and the passage of refrigeration connections;
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Fixing on mechanical anchors in the brick, installation of reinforced brackets , then installation of the unit with anti-vibration shimming.
The result: a compact and elegant unit that frees up floor space , protects equipment from winter splashes and leaves the way clear for occupants.
Everyday performance and comfort
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Quiet cooling in hot weather, precise diffusion flaps on the indoor head side (installed inside the housing).
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Stable heating in autumn/winter, without aggressive on/off: the inverter maintains a uniform temperature and reduces consumption peaks.
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Improved air quality thanks to wall-mounted head filters and modulation that limits drying.
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Energy savings : as a replacement (or in addition to) electrical backups, the heat pump covers most mid-season needs and a large part of Montreal's winter.
Key technical details of the installation
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Equipment type : Sharp wall-mounted heat pump , ZU1 range (R-32) , inverter .
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Retained capacity : configuration ≈ 12,000 BTU adapted to the surface area of the accommodation and its insulation (dimensions validated by our calculations).
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Support : galvanized wall brackets , blue anti-vibration pads , stainless steel bolts.
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Refrigeration connections : high density insulated copper , brazed and tested under nitrogen ; deep vacuum < 500 microns before commissioning.
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Electrical : Dedicated circuit , rated circuit breaker , adjacent disconnect box ; wiring in conduit for mechanical protection.
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Finish : grey capping coordinated with the facade, UV sealant , clear labeling for future maintenance.
AirGreen Site Challenges and Solutions
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Proximity to the meter and the service pole : we ensure the required electrical clearances and clean routing of the conduits.
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Narrow aisle : raised wall mounting to keep the space functional, limit the risk of impact and elevate the unit above snow accumulation.
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Vibrations and noise : anti-vibration pads and precise timing for discreet operation near neighbors.
Possible grants and eligibilities
High-efficiency wall-mounted heat pumps running on R-32 and designed for extreme cold may be eligible for certain provincial and Hydro-Québec programs, depending on the model and configuration. At AirGreen, we verify the current criteria for you , prepare the grant application and provide the required documentation .
HVAC Maintenance: Maintaining Performance Year After Year
Regular HVAC maintenance ensures longevity and consistent performance:
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Cleaning the internal battery and fan;
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Verification of operating pressures and temperatures;
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Checking electrical connections and condensate drainage;
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Inspection of the wall bracket, tightening and condition of the pads .
We offer maintenance plans tailored to homes in Montreal, Laval, Longueuil, North Shore and South Shore to keep your system running at its best.
Practical siting tips for brick buildings
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Raise the condenser (≈ 45–60 cm) to clear snow and facilitate drainage.
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Maintain clearances around the grid and avoid obstacles (fences, sheds, vegetation).
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Limit the length of refrigeration lines: the shorter the better (efficiency, reliability).
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Ensure the sealing of the drilling and the continuous insulation of the lines.
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Plan for maintenance : free access to the disconnect box and fittings for annual inspections.
Why entrust us with your heat pump project in Montreal?
At AirGreen , we combine rigorous sizing , clean execution and complete support (grants, commissioning, maintenance). Our team is fully familiar with Montreal's brick buildings and the constraints of Quebec winters ; each installation is designed to last , save money and remain discreet .
And what about your accommodation?
Whether you are in Montreal , Laval , Longueuil , on the North Shore or the South Shore , we offer HVAC solutions adapted to your surface area, your insulation and your lifestyle. A technical visit is enough to validate the capacity (BTU) , the line route and the electrical feasibility , then we plan a surprise-free , turnkey installation.
Naturally integrated background keywords : heat pump , wall-mounted heat pump , HVAC installation , HVAC maintenance , Montreal , Laval , Longueuil , North Shore , South Shore , Sharp , R-32 , inverter , wall brackets , disconnect box , anti-vibration , brick .