A wall-mounted heat pump installation adapted to the constraints of a flat roof
In the heart of Ville-Marie, a vibrant neighborhood in downtown Montreal, our team recently completed the installation of a Gree wall-mounted heat pump on an apartment building. The project had a unique feature: the outdoor unit had to be installed directly on a flat, gravel-covered roof —a common configuration in urban buildings, but one that requires specific HVAC expertise.
At AirGreen , we understand that such a context requires securing the stability of the unit , ensuring optimal ventilation clearance, and adapting the routing of refrigerant lines. This type of work requires precision and rigor, especially when occupant comfort depends on reliable air conditioning during Montreal summers and efficient heating in winter.
Why choose a Gree wall-mounted heat pump in Ville-Marie?
The Gree wall-mounted heat pump is a preferred choice for urban homeowners. Compact and efficient, it offers:
-
High performance thanks to its Energy Star certified energy efficiency.
-
Reliable performance in winter , with a heating capacity down to -25°C, an essential asset for the Montreal climate.
-
Quiet comfort , both in air conditioning and heating mode.
-
Compatibility with provincial and federal grant programs (e.g. LogisVert, Federal Grant for Energy Efficiency).
For a condominium building or rental accommodation, installing a Gree heat pump is an ideal solution, combining energy savings, all-season comfort and respect for the environment .
Features of installation on a flat roof
Installing an outdoor heat pump unit on a flat roof is not something you can do on the fly. For this Ville-Marie project, we implemented the following steps:
Specialized support and secure fixing
The outdoor unit was mounted on a raised aluminum support , which was anchored to treated wooden crosspieces. This technique allows for:
-
Protect the heat pump from moisture and gravel.
-
Maintain optimal ventilation under the appliance.
-
Reduce vibrations transmitted to the building.
Routing of refrigerant lines
The insulated pipes were run through a carefully sheathed technical route , passing through a protected wall outlet. The white capping ensures watertightness and aesthetic integration.
Drainage management
Thanks to the natural slope of the roof and the positioning of the device, the condensate is evacuated by gravity , avoiding the use of an additional pump.
Urban constraints
In the city center, the installation was carried out in compliance with safety regulations relating to working at height and with particular attention paid to reducing noise for immediate neighbors.
Results for building occupants
At the end of the installation, the occupants were able to immediately benefit from balanced thermal comfort :
-
Effective air conditioning during periods of intense heat, often accentuated by Montreal's urban island effect.
-
Stable and economical heating for winter, reducing dependence on traditional electrical systems.
-
An optimized electricity bill thanks to the efficiency of the wall-mounted heat pump.
AirGreen expertise serving Montreal flat roofs
This project perfectly illustrates our approach: analyzing each context, anticipating constraints and offering a tailor-made solution . Whether for a condo in downtown Ville-Marie, a house on the South Shore or a duplex in Laval, our qualified installers ensure reliable, durable installations that comply with Quebec HVAC standards.
We also support our clients in grant applications , in order to maximize the return on investment.