A careful installation on an urban roof for four-season comfort
At AirGreen , we are often called upon for installations in complex environments where interior space is limited. This is exactly the case for this project in the Rosemont–La Petite-Patrie sector of Montreal. Here, our team carried out the complete installation of a GREE Flexx Ultra R32 central heat pump , mounted on the roof of a flat-frame commercial building—an ideal solution for maximizing energy performance without encroaching on interior space.
A state-of-the-art system
The GREE Flexx Ultra R32 is a new generation central heat pump that runs on R-32 refrigerant , a gas with low environmental impact. This model, available in 2 to 5 ton capacities , is designed to offer exceptional efficiency, with stable performance even in the harsh Quebec winters.
-
High efficiency inverter compressor
-
Reliable operation down to −30°C
-
Compatibility with Hydro-Québec and LogisVert program subsidies
-
Higher energy efficiency (SEER2 > 18)
Technical details of the installation
The installation was carried out on a flat elastomeric membrane roof , a context typical of light industrial buildings and small businesses in the Rosemont sector.
-
Raised aluminum stand : protects the unit from water accumulation and snow.
-
Anti-vibration base to limit the transmission of structural noise.
-
Refrigeration and electrical connections protected by an insulating sheath, perfectly sealed to prevent any infiltration.
-
Galvanized duct outlet optimizing air circulation between the condenser and the interior plenum.
-
Safe distance between units to ensure optimal heat exchange.
Adaptation to site constraints
This flat roof offered little direct access to a technical descent, which required specific routing of the cabling and refrigeration ducts . Our technicians used treated wood rails and adjustable aluminum studs , allowing for a smooth and stable passage, while respecting roof safety standards.
We have also integrated gravity drainage for condensate removal, thus avoiding the need for a pump and reducing the risk of freezing in winter.
Result: impeccable performance and aesthetics
The end result is a clean, robust and durable installation, integrating harmoniously with the roof configuration. The client now benefits from consistent year-round comfort , reduced energy consumption and an easy-to-maintain system.
At AirGreen , we combine technical expertise and field experience to offer HVAC solutions tailored to each building—whether it's a Montreal duplex, a local business, or a mixed-use building.
Why choose AirGreen for your heat pump projects in Montreal?
-
RBQ certified installers specializing in high-efficiency heat pumps.
-
Official partners GREE, Fujitsu, Midea and Sharp.
-
Complete follow-up : estimation, installation, maintenance and grant assistance.
-
Proven experience in rooftop installations and in dense urban environments.
Trust AirGreen , your HVAC expert in Montreal, for a reliable, aesthetic and efficient installation — no matter the complexity of the site.