A discreet, efficient installation, perfectly suited to the urban configuration of a flat roof
At AirGreen , we recently completed a GREE Flexx R32 central heat pump installation in the Chomedey district of Laval , a residential area characterized by its flat roofs and modern buildings. This project perfectly illustrates our expertise in HVAC installation on gravel surfaces , where stability, durability and energy performance must coexist in a limited space.
A wise choice: the GREE Flexx R32
The GREE Flexx R32 is a central heat pump designed for northern conditions, offering reliable performance down to −25°C . Compatible with R-32 refrigerant , it boasts superior energy efficiency and a reduced carbon footprint—two key elements in Quebec's new residential HVAC standards.
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Capacity : from 2 to 5 tonnes, depending on the interior configuration.
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Energy efficiency : High SEER and inverter technology.
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Compatibility : Ducted systems, air managers and smart thermostats.
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Grants : eligible for Quebec energy efficiency programs.
A typical Chomedey installation context
This project took place on a flat gravel roof , a common configuration in Laval for modern and multi-unit buildings. The available space required installation on a raised support , guaranteeing optimal ventilation and protection against water and melted snow.
Our technicians installed a galvanized steel structure , fixed on treated wooden soles to avoid any direct contact with the gravel and ensure stability. This type of assembly also helps reduce vibrations transmitted to the building structure.
Technical details of the installation
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System type : GREE Flexx R32 central heat pump.
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Outdoor installation : placed on a raised metal structure, with anti-vibration support.
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Refrigerant pipes : protected vertical path, insulated and covered in black to match the facade.
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Condensate management : gravity drainage, without pump, taking into account the natural difference in level.
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Power supply : UV-resistant sheathed wiring, connected to a dedicated circuit breaker.
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Technical access : 60 cm service clearance around the condenser for simplified maintenance.
Each step was carried out according to CSA and RBQ standards , in compliance with AirGreen installation standards.
The challenges encountered and our solutions
One of the major challenges was the weight and stability of the condenser on the roof. We addressed this constraint by using a double-support structure , providing both rigidity and even load distribution.
The other key point concerned weather protection : a removable snow guard was provided to limit ice buildup in winter. Finally, the routing of the refrigerant pipes was optimized to minimize heat loss, while maintaining a clean and discreet aesthetic.
Results and performance achieved
The customer now benefits from stable thermal comfort all year round , with energy consumption reduced by approximately 30% compared to his old electrical system . The GREE Flexx R32 has proven to be quiet, efficient, and perfectly adapted to the climatic variability of Greater Montreal .
Why choose AirGreen for your central heat pump installation?
At AirGreen, we combine engineering, precision, and local experience to deliver installations that combine performance, durability, and aesthetics. Each project is tailored to the building's specific environment, whether it's a Montreal plex , an urban condo , or a suburban residence in Laval .
Our commitments:
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Free and personalized assessment.
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Installation in accordance with the highest standards.
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Complete after-sales support (maintenance, repair, optimization).
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Help in obtaining available subsidies (Hydro-Québec, Chauffez vert, etc.).
Conclusion
This GREE Flexx R32 central heat pump installation in Chomedey demonstrates our expertise in installing high-performance HVAC systems on flat roofs , combining comfort, efficiency, and durability. Thanks to our rigorous approach and the quality of the equipment we select, we help make Laval homes more energy-efficient and comfortable, both in winter and summer.