In Rosemont–La Petite-Patrie, more and more homeowners are taking advantage of their flat roofs to install discreet, efficient heating and cooling systems perfectly suited to Montreal conditions. That's precisely what we did here: we installed a Gree Inverter wall-mounted heat pump using R-32 refrigerant , designed to provide year-round comfort for an urban dwelling while respecting the roof membrane and the building's aesthetics.
A typically Montreal project: flat roof, membrane, and neighborhood
The building has a flat roof made of elastomeric membrane , very common in Rosemont's plexes. This type of configuration imposes several constraints:
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protect the membrane against point loads and perforations;
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raise the unit to protect it from water, snow and ice;
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minimize vibrations and noise transmitted to the dwellings below;
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maintain secure access for maintenance.
Our team therefore designed an installation that respects these constraints while optimizing the performance of the Gree heat pump.
A Gree Inverter R-32 wall-mounted heat pump, ideal for Montreal's climate
The heart of the project is a Gree wall-mounted heat pump with Inverter technology , using R-32 type A2L refrigerant, which is more efficient and more environmentally friendly than older refrigerants.
This type of system offers several advantages for housing in Rosemont–La Petite-Patrie:
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Efficient heating in winter : the heat pump continues to deliver heat even in very cold weather, drastically reducing reliance on electric baseboard heaters.
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Gentle air conditioning in summer : Inverter regulation precisely adjusts the power, which avoids sudden cold snaps and temperature variations.
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Very good energy efficiency : by modulating the compressor speed, electricity consumption is optimized throughout the year.
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Quiet operation : an essential point in a dense area where buildings are close together.
The system is sized to meet the actual needs of the dwelling, taking into account insulation, orientation and the volume to be air-conditioned.
An elevated installation that protects the roof and the machine
The photo clearly shows that the Gree outdoor unit is installed on a four-legged aluminum stand , itself placed on distribution plates and treated wood beams .
This setup has several advantages:
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Membrane protection : the plates under the beams distribute the loads and prevent any perforation or puncture of the roof.
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Unit elevation : the heat pump is kept above accumulations of water, snow and ice, which prolongs its lifespan and facilitates drainage.
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Stability and wind resistance : the beams and support ensure a solid anchorage, important on a roof exposed to gusts.
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Simplified access for maintenance : the working height is comfortable for our technicians, which facilitates periodic checks.
This type of structure is a standard at AirGreen when it comes to installing a heat pump on a flat roof in Greater Montreal.
Carefully installed and well-protected refrigerant connections
Another visible detail of the installation is the routing of the refrigerant lines and electrical wiring , which run along the vertical facade before entering the building.
We have :
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insulated and protected the duct using a sheath covered with black and white tape, which protects against UV rays and weathering;
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respected the recommended bending radii for copper pipes in order to preserve the performance and reliability of the refrigeration circuit;
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separate and protected the condensate drain (small visible white pipe), so as to ensure free flow and prevent any stagnation of water on the roof;
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Careful attention was paid to the wall penetration (behind the unit) in order to maintain the air and water tightness of the building envelope.
The result is a conduit passage that is clean, discreet and easy to inspect when needed.
Four-season comfort for the occupants
Inside, the Gree wall-mounted heat pump now provides:
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stable and comfortable heating in winter, without temperature fluctuations;
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efficient and quiet air conditioning during hot periods;
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better temperature distribution than with baseboard heaters or a simple window air conditioner;
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precise control thanks to the thermostat/wall control, allowing temperatures to be programmed according to living schedules.
For the occupants, this translates into increased comfort , a reduced electricity bill and the possibility of enjoying the accommodation in all seasons, even during heat waves or extreme cold.
AirGreen, a certified Gree heat pump installer in Rosemont–La Petite-Patrie
As a company specializing in residential HVAC in Greater Montreal, we support our clients from start to finish :
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advice on brand and capacity selection;
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structural check (flat roof, balcony, backyard, etc.);
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installation carried out according to best practices (refrigeration, electricity, roofing);
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startup, explanation of operation and maintenance advice;
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after-sales service and preventive maintenance.
Our partnership with Gree allows us to offer our clients reliable, high-performance solutions perfectly adapted to the Montreal climate.
Are you considering a Gree flat roof heat pump in Montreal?
Whether you are in Rosemont–La Petite-Patrie , on the Plateau, in Villeray or elsewhere in Greater Montreal, our team can assess the feasibility of an installation on a flat roof or on an elevated structure, as in this project.
We analyze:
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the configuration of your building;
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the required capacity depending on your accommodation;
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the best placement options to preserve the roof and limit noise;
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the financial assistance programs for which you may be eligible.
Contact AirGreen to discuss your Gree wall-mounted heat pump project and discover how we can make your home more comfortable and energy-efficient, summer and winter.