A high-performance HVAC solution adapted to flat roofs in the heart of Montreal
At AirGreen , we recently installed a GREE Flexx Ultra R32 central heat pump on the flat roof of a residential building located in the Rosemont–La Petite-Patrie neighborhood, in the heart of Montreal. This project perfectly illustrates our expertise in adapting modern HVAC systems to the typical urban architectural constraints of Montreal, where flat roofs and restricted access require meticulous planning.
Context of the installation: a typical Montreal building
The building in question, a multi-unit apartment complex, required a reliable and efficient centralized heating and cooling solution to replace an aging system. The flat roof provided the ideal location for the condenser, while limiting noise pollution for occupants.
Our technicians chose the GREE Flexx Ultra R32 , a high-performance central heat pump, equipped with R-32 refrigerant, recognized for its energy efficiency and low environmental impact.
Choosing GREE Flexx Ultra R32: performance and durability
This central heat pump is designed to withstand Quebec winters, offering stable performance down to -25°C . It is distinguished by:
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Its superior energy efficiency , with a high SEER and an HSPF coefficient optimized for extended heating.
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Its compatibility with existing duct systems , which facilitates replacements without major work.
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Its inverter technology ensures constant comfort and a significant reduction in energy costs.
Technical details of the installation
The installation, carried out on a flat roof covered with gravel , involved several logistical challenges that our team met with precision:
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Galvanized steel supports fixed on treated wooden soles , ensuring perfect stability of the condenser.
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Complete insulation of refrigerant lines with high density sleeves to withstand extreme thermal variations.
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Neat routing of electrical and refrigerant conduits , concealed in waterproof white wiring for optimal protection and a clean aesthetic.
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Connection to the electrical panel made via a dedicated circuit breaker ensuring safety and compliance with Quebec standards.
This approach not only guarantees the reliability of the system, but also its longevity in the face of Montreal's variable climatic conditions .
Adapting to urban conditions: performance and discretion
Installing a high-performance HVAC system in a dense environment like Rosemont–La Petite-Patrie requires special attention to sound discretion and space optimization . Thanks to the compact design of the GREE Flexx Ultra R32 , we were able to maintain a regulatory distance from the peripheral walls while ensuring free and efficient airflow.
Safety, compliance and sustainability
All elements of the installation comply with the standards of the Quebec Building Code . Our technicians have verified:
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The inclination and solidity of the support to prevent any vibration.
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Gravity drainage of condensate, eliminating the need for a lift pump.
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Optimal compressor operation after pressurization and nitrogen leak testing.
Customer Benefits
With this new GREE Flexx Ultra R32 heat pump, the customer now benefits from:
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Consistent comfort all year round — heating in winter, air conditioning in summer.
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Reduced energy consumption , supported by R-32 technology.
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Potential access to Quebec subsidies for energy efficiency.
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Simplified maintenance thanks to a centralized and accessible system.
An installation emblematic of AirGreen know-how
This installation illustrates AirGreen 's ability to combine technical expertise , quality of execution , and respect for Montreal's architectural particularities . Each project is custom-designed to ensure the best possible energy performance and comfort for our clients.