The comfort of a Montreal duplex reinvented: a clean, elevated installation designed for winter — by AirGreen.
Why this installation stands out
In a typical Rosemont–La Petite-Patrie duplex, we installed a GREE wall-mounted heat pump ( R-32 refrigerant). The outdoor unit sits on a raised aluminum support with anti-vibration pads ; the white capping protects the refrigeration path and ensures a clean finish. The goal: to provide energy-efficient heating and precise air conditioning for the main living areas, while optimizing durability in the face of Greater Montreal winters.
Client context and needs
Four-season comfort in an urban space
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Montreal apartment with paved backyard and limited clearance on the wall side.
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Need a quiet device, reliable in cold weather and visually discreet.
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Priorities: energy efficiency , controlled operating costs, and rapid HVAC installation without major work.
Our AirGreen approach
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Thermal assessment (envelope, orientation, windows, occupancy habits).
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Conservative sizing to avoid oversizing (stable performance, fewer short cycles, better dehumidification in summer mode).
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Choice of a GREE R-32 model from the recent residential range , compatible with cold climates and suitable for a main area (living room + open kitchen or central floor).
The chosen equipment and its advantages
Why a GREE R-32 wall-mounted heat pump ?
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High seasonal efficiency and reduced carbon footprint thanks to R-32 (less load and better heat transfer than older R-410A).
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Inverter modulation : the device finely adjusts its capacity; stable comfort and savings.
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Winter heating mode designed for our conditions (efficient defrosting, condensate management, protected electronics).
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Simplified maintenance : clear access to filters and the exchanger; ideal for annual preventive HVAC maintenance .
Expected result: constant comfort, lower consumption compared to electric convectors alone, and precise air conditioning in summer.
Installation details that make the difference
Outdoor installation - durable and quiet
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Raised Aluminum Support : Raises the condenser above the snow line and splashes; facilitates drainage and service access.
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Visible anti-vibration pads under the anchors: reduction of transmissions to the ground and adjoining walls.
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Continuous white capping : UV and mechanical protection of refrigeration connections and the communication cable.
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Compact path (typically 3 to 6 m): lower pressure losses, better efficiency and neat aesthetics.
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Clearances respected for condenser ventilation and service access.
Interior integration - cleanliness and efficiency
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Single, sealed and insulated perforation (vapor barrier and weather shield).
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Gravity slope provided for condensate drainage on the interior side when possible; otherwise, dedicated discreet pump.
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Proper electrical connection with external disconnect switch near the unit, on a dedicated circuit — safety and compliance with the Code.
AirGreen Quality: Method and Controls
Commissioning Checklist
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Deep vacuum (target ≤ 300 microns) to ensure the absence of moisture and non-condensables.
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Leak test (pressure gauges + foaming solution on flared fittings).
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Checking currents and polarity ; Inverter modulation test.
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Performance measurements (ΔT in cold/heat mode, blowing temperatures) and series recording for the customer file.
Finishing
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Clamps at key points, bending radii respected for copper tubes, continuous insulation without bridges.
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Explanation to the customer: modes, eco-settings, programming, filter cleaning, winter clearance instructions.
Operating tips to maximize savings
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Smart supplemental heating : Let the heat pump run continuously at low speed; it is most efficient this way.
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Summer: Target 23–24°C with dehumidification ; long cycles improve comfort.
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Winter: Keep the area in front of the condenser clear of snow for 1 m in front and 30 cm laterally.
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HVAC Maintenance : Filter cleaning every 4–8 weeks in season; annual AirGreen visit (electrical inspection, coil, fan, condensate, parameter updates).
Common Mistakes…and How We Avoid Them
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Oversizing : noisier, less comfortable, less energy efficient. Our load calculation avoids this pitfall.
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Condenser too low : risk of icing and snow being sucked in. Here, the high support protects the unit.
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Poorly insulated connections : losses and condensation. We install continuous, waterproof insulation .
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Discontinuous capping : UV and mechanical shocks damage the connections. Our route is protected from end to end .
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Poorly designed drain : water backs up when thawing. We prefer gravity or a properly heated and insulated pump.
Deadlines and organization of the worksite
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Technical visit : 30–60 minutes for surveys, location selection and options.
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HVAC installation : generally one day for one area; less disruption, site left clean at the end of the intervention.
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Commissioning : testing, configuration, user training and submission of the file (serial numbers, technical photos, advice).
Grants and eligibility (according to current programs)
Many recent R-32 wall-mounted heat pumps with high seasonal efficiency may be eligible for certain provincial/municipal programs. We verify your eligibility upon submission and prepare the required documents. This GREE installation meets the best practices sought (efficiency, careful installation, snow clearance).
Results for the client
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Stable comfort in winter and summer, without drafts.
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Lower electricity costs compared to resistive heating alone.
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Reduced noise level , both indoors and in the courtyard.
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Aesthetics respected: discreet capping, aligned condenser, clean fixings.
When to choose an R-32 wall-mounted GREE?
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Condo, duplex or house with main area to be air conditioned/heated.
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Controlled budget with serious returns and recognized reliability .
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Need a quick-to-install solution without existing ductwork.
AirGreen Tip : For multi-room homes, we also offer GREE R-32 MultiZone systems or combinations with cassette or ducted ducts depending on the architecture. We size each head to avoid comfort imbalances.
HVAC Maintenance: Recommended Schedule
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At seasonal changes : cleaning filters, visual inspection of the capping and support.
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Annual (by our technicians):
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Cleaning indoor/outdoor coils.
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Checking the currents and the inverter.
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Checking the fittings and insulation.
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Defrost and drain test.
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Updated comfort settings.
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What you get with AirGreen
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A local team that knows the realities of Montreal, Laval, Longueuil, North Shore and South Shore .
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Unbiased advice on power (BTU), number of zones and integration options.
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A certified, clean, documented installation — ready for years of service.
In short
This GREE R-32 wall-mounted heat pump installation, installed on a raised support with anti-vibration and integral capping , offers the customer four-season comfort and real efficiency , perfectly adapted to the requirements of Greater Montreal.