A flat roof installation in the heart of the Saint-Laurent industrial sector
In the dynamic landscape of Saint-Laurent, between modernized warehouses and mixed-use buildings, AirGreen recently completed a Gree Flexx R32 central heat pump installation , specially adapted to the constraints of a commercial flat roof .
This project perfectly illustrates our expertise in efficient and sustainable HVAC (heating, ventilation and air conditioning) systems for the Montreal climate.
A strategic choice: the Gree Flexx R32
The Gree Flexx R32 stands out as one of the most modern central solutions in its class. Designed to deliver stable performance down to -25°C , this central heat pump combines power, energy efficiency and reliability.
Its variable-speed compressor and R-32 refrigerant make it both environmentally friendly and efficient—ideal for high-occupancy or mixed-use buildings.
Key features of the Gree Flexx R32:
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Capacities from 2 to 5 tonnes , perfect for multi-unit buildings and businesses.
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Operates on R-32 , reducing global warming potential by 68% compared to R-410A.
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High-efficiency inverter compressor for better power modulation.
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Reduced noise level , essential for installations in dense urban environments.
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Compatibility with Quebec subsidy programs (Hydro-Québec, LogisVert, etc.).
The challenges of a flat roof: stability, drainage and safety
Installing a heat pump on a flat roof requires careful planning. In this project, our team considered several technical parameters:
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Anti-vibration support mounted on sturdy metal rails, ensuring the stability of the unit despite thermal variations and high winds.
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Drainage management by gentle slope, avoiding any stagnation of water under the structure.
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Protected routing of refrigerant pipes and electrical wiring through existing service ducts.
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Respect for the white waterproofing membrane , crucial for the durability of the roof.
Thanks to our experience in HVAC installation on flat roofs , each step was carried out with rigor — from precise positioning of the unit to complete commissioning.
Integration into existing system
The building already had an air duct network, which allowed efficient integration of the Gree Flexx R32 into the existing central system.
Our technicians adjusted the connections and checked the air balance to ensure uniform comfort across all zones .
This approach avoids pressure drops and optimizes energy consumption, an essential asset for owners looking to reduce their operating costs .
Performance and efficiency: everyday comfort
Since its start-up, the Gree Flexx R32 system has maintained stable comfort conditions, both in summer and winter.
In heating mode, it uses the heat from the outside air even at -25°C; in air conditioning mode, it guarantees a constant indoor temperature, while effectively filtering the air circulating in the ducts.
Results obtained:
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Optimal thermal comfort throughout the building.
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Estimated average reduction of 25% on annual energy bill .
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Simplified maintenance thanks to secure technical access to the roof.
Why choose AirGreen for your flat roof installations?
At AirGreen , we have developed specific expertise in the installation of central heat pumps on flat roofs and commercial buildings .
Our facilities meet the highest standards of safety and performance, while integrating sustainable ecological solutions.
Our commitments:
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Free on-site evaluation before any submission.
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Transparent and detailed prices , no surprises.
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Full installation warranty , compliant with manufacturer requirements and RBQ standards.
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Responsive after-sales service covering all of Greater Montreal , from Laval to the South Shore .
An exemplary project for sustainability and energy efficiency
This Saint-Laurent project demonstrates how modern HVAC technologies can adapt to urban architecture while meeting the energy requirements of today's Quebec.
The combination of a new generation refrigerant , careful installation and AirGreen know-how makes all the difference.
Are you planning a similar project?
Contact our team for a personalized assessment of your HVAC needs.
Whether for a residential, commercial or industrial building , our experts will be able to recommend the most efficient and cost-effective solution , supported by available subsidies.