Stable comfort, controlled consumption: careful installation that makes the difference in a typical Montreal home
Project context and client expectations
In this Rosemont–La Petite-Patrie apartment, the owner was looking for a quiet, energy-efficient HVAC solution to cool the living area adjacent to the kitchen and provide additional heating in the spring and fall. The priorities: limiting the visual impact, respecting a realistic budget, and ensuring a durable installation in anticipation of Montreal winters. We recommended a Gree R-32 generation wall-mounted heat pump, perfectly suited to small urban spaces and the load-bearing walls typical of plexes in the area.
Why a Gree wall-mounted heat pump for urban housing?
Gree manufactures wall-mounted units renowned for their reliability, precise compressor modulation, and cold-weather heating performance. Gree's R-32 series features a lower GWP refrigerant than R-410A and optimized defrost algorithms. For light renovations, the wall-mounted heat pump is ideal: it doesn't require ductwork, can be installed above an opening or ceramic backsplash, and reduces installation costs compared to a central system.
Site survey: constraints and technical choices
The room had a ceiling with a slight soffit, a clear wall, and a tile backsplash on the lower part. We approved:
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Installation height : approximately 2.10 m for optimal diffusion and easy access to filter maintenance.
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Refrigeration path : back-to-back rear crossing towards the outside in order to minimize the length of the lines (≈ 3 to 4 m total once at the condenser).
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Condensate management : gravity drainage to the outside with a continuous slope, which limits maintenance compared to a lifting pump.
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Drilling : Single 2-1/2" core drilling with sleeve and vapor barrier ; watertight sealing on the inside and outside.
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Power supply : dedicated circuit breaker, external ML cable with white cover matching the finishes.
Key steps in AirGreen installation
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Precise implantation : laser tracing to maintain perfect alignment under the soffit and respect the required clearances around the head.
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External support : condenser placed on galvanized wall brackets with silent blocks to neutralize vibrations; clearance above snow level.
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Refrigeration lines : clean bending, double-layer insulation, flared connection to exact torque with torque wrench; vacuum draw < 500 microns and nitrogen leak test.
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Condensate management : outlet under UV hood, slope controlled from the crossing, gutter on the facade to prevent runoff onto the masonry.
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Commissioning : checking pressures and temperatures, calibrating shutters, configuring low temperature heating mode and automatic restart after power cut.
Result: homogeneous diffusion and controlled noise
The compact and sleek Gree indoor head blows horizontally over the backsplash. Thanks to the vertical/horizontal sweep , the air conditioning irrigates the kitchen and dining room without direct airflow. In night mode, the compressor modulates finely: the noise level remains low, even when maintaining temperature.
Expected performance and savings
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Capacity : Typical range 9,000–12,000 BTU/h for this room size; sizing confirmed by our load calculations (area, orientation, window spacing, insulation).
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Performance : Next-generation R-32 SEER/SCOP, Energy Star compatible depending on the variant selected; reduced electricity bill compared to a window air conditioner + baseboards.
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Montreal winter : maintains useful power at low temperatures thanks to injection control and the intelligent defrost cycle, ideal for supplementary use in a plex.
Potential Grants and Eligibility
Recent R-32 wall-mounted heat pumps , Energy Star certified and with good cold weather performance, may be eligible for provincial programs . We assist our customers to verify model compatibility and prepare the file (installation invoices, serial numbers, equipment photos). Residents of Montreal, Laval, Longueuil, North Shore and South Shore benefit from our administrative support from product selection to parts drop-off.
HVAC Maintenance: Maintaining Performance Year After Year
A well-sized system maintains its performance if it is maintained:
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Clean filters every 4 to 8 weeks during the season.
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Washing of coils and disinfection of the tank to avoid biofilm and odors.
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Annual refrigeration inspection : pressures, subcooling, superheat.
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Check the condensate drain before summer and in the fall.
At AirGreen, we offer HVAC maintenance plans tailored to small and multi-unit dwellings, with clear reports and recommendations.
Aesthetic integration details
The client wanted to avoid an invasive rollover. We:
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aligned the plate so that the head fits under the soffit;
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chose a white exterior hood to match the painted brick;
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hidden the visible fixings and fitted anti-corrosion nut covers ;
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ensured a shutter opening radius without conflict with the rod and the neighboring curtain.
Good AirGreen practices observed on this site
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Perfect bubble installation : an impeccable level preserves the gravitational flow and the geometry of the shutters.
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Optimized refrigeration length : less pressure loss, better modulation response.
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Calibrated silent blocks **: less resonance on the facade masonry.
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Condenser height : excluding snow plow area and clearance for defrost drain.
Instructions for use by the occupant
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Maintain a stable setpoint (e.g. 23–24°C in summer; 20–21°C in the off-season) to benefit from modulation.
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Use the dehumidification mode when the air is heavy: the feeling of freshness increases without lowering the temperature too much.
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Avoid obstacles in front of the head; leave 1.5 to 2 m of clearance for even diffusion.
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In winter, turn off extreme eco mode if the space needs a more constant boost.
Quick comparison: why a heat pump rather than a wall-mounted air conditioner alone?
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Useful heating in spring and autumn without having to turn on the baseboards.
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Higher efficiency thanks to the inverter: fewer jolts, better acoustics.
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Grants possible depending on configuration and certification.
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Reduced carbon footprint with R-32 and heat recovery.
What we put forward on each project
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Accurate diagnosis (thermal load) and selection of the correct BTU .
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Finish : discreet cover, clean seals, stainless steel screws.
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Documentation : serial numbers, installation photos, commissioning values.
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Support : from Montreal to Laval , Longueuil , North Shore and South Shore , same level of requirement and after-sales service.
What if your accommodation has a different layout?
Whether it's a multi-zone system to serve several rooms, a ceiling cassette for a space without free walls, or a central heat pump for an entire house, we size and install Gree, Fujitsu, Midea, Sharp, Zephyr, Elios systems and other references covered by our teams. The key remains the quality of execution : compliant fluid charge, reliable condensate drainage, fine adjustments at commissioning, and ongoing HVAC maintenance.
In summary : this HVAC installation in Rosemont–La Petite-Patrie illustrates what we stand for at AirGreen: a relevant choice of wall-mounted heat pump , methodical installation, clean finishes and clear support, for lasting comfort in summer and in the off-season, with controlled operating costs.