A sustainable solution for an urban building in Greater Montreal
In Montreal's Hochelaga-Maisonneuve neighborhood, we recently completed the installation of a Gree wall-mounted heat pump with a condenser installed on a flat roof. This project perfectly illustrates AirGreen's ability to adapt its working methods to the realities of urban buildings, where floor space is limited and rooftop access is often the best option.
Project background
The client, the owner of a commercial building with several premises, was looking for an energy-efficient solution to ensure consistent comfort, both summer and winter. The building's layout, with no free outdoor floor space, led to the option of installing the Gree heat pump condenser on the roof, in a secure and sustainable manner.
Technical details of the installation
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Device type : wall-mounted heat pump (mini-split).
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Brand : Gree.
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BTU : 12,000 BTU unit, ideal for a medium-sized indoor area.
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Facility :
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Condenser fixed on a galvanized aluminum support , raised on treated wooden beams to distribute the weight and protect the roof membrane.
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Connection via technical chimney with watertight outlet, guaranteeing the integrity of the roof and optimal insulation.
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Slope respected for the flow of condensates.
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Electrical wiring run directly through the technical conduit, simplifying future maintenance.
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Challenges and solutions
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Preserving the roof's waterproofing :
We installed a sealed metal chimney for the passage of refrigerant pipes, avoiding any risk of water infiltration. -
Stability and resistance to climatic conditions :
Montreal is subject to strong winds and snow accumulations. The overhead support with sturdy fasteners and wooden wedges ensures optimal resistance, even in winter. -
Accessibility for maintenance :
The equipment was installed with sufficient clearance to facilitate HVAC maintenance, whether it was coil cleaning or electrical inspections.
Customer Benefits
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Year-round comfort : efficient air conditioning in summer and efficient heating in winter down to -25°C.
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Energy savings : Gree inverter technology reduces electricity consumption compared to a traditional system.
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Eligibility for subsidies : programs such as LogisVert and Hydro-Québec help reduce acquisition costs.
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Space Optimization : No sacrifice of parking space or backyard space thanks to rooftop installation.
AirGreen expertise in urban environments
At AirGreen , we understand that every urban project presents unique challenges: flat roofs, restricted access, and shared buildings. Our experience in neighborhoods like Hochelaga-Maisonneuve, Plateau-Mont-Royal, and Rosemont allows us to offer solutions perfectly tailored to the needs of homeowners.
Recommended maintenance
To extend the lifespan of this type of heat pump, we recommend:
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Biannual inspection (spring and fall).
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Cleaning coils and filters.
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Checking the roof's waterproofing around technical passages.
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Control of the support level to compensate for possible structural movements of the building.
Conclusion
This installation of a Gree heat pump on a flat roof in Hochelaga-Maisonneuve perfectly illustrates the combination of energy performance, robustness, and technical expertise . Thanks to careful planning and recognized expertise in the HVAC field, the client now benefits from lasting comfort and reduced energy costs.