A flat roof installation designed for performance and durability
At AirGreen , we recently completed the installation of two GREE Livo R32 wall-mounted heat pumps in a residential building in the Rosemont–La Petite-Patrie district of Montreal. This project perfectly illustrates our expertise in integrating high-performance, sustainable HVAC solutions into the typical urban fabric of the metropolis: flat-roofed buildings, limited access, and the architectural constraints specific to Montreal triplexes and plexes.
The context: four-season comfort for a typical Rosemont building
The owner wanted to modernize his air conditioning and heating system to ensure consistent comfort all year round , while reducing his energy costs. The old, aging, energy-intensive units no longer met current performance and reliability requirements.
Our recommendation: the GREE Livo R32 wall-mounted heat pump , a compact, energy-efficient solution perfectly suited to the climatic conditions of Greater Montreal. Thanks to its R-32 refrigerant, this series offers better energy efficiency and a reduced environmental impact , while maintaining excellent performance down to −25 °C .
A flat roof installation: technical, precise and careful
This project presented a specific challenge: the outdoor units had to be installed on the building's flat roof . This type of configuration, common in Montreal's central neighborhoods, requires meticulous planning to ensure the stability, safety, and durability of the installation.
Our technicians opted for raised aluminum supports fixed on anti-vibration rails resting on treated wooden boards . This system ensures even weight distribution , protects the roof covering and limits vibrations transmitted to the building structure.
The refrigerant connections were carefully protected by a brown cover , ensuring both mechanical protection and aesthetic integration into the urban landscape. This attention to detail, specific to our AirGreen teams, guarantees a clean, durable installation that complies with ventilation and evacuation standards .
A perfect pairing: two GREE units for two independent zones
As the building has several apartments, the chosen configuration is based on two independent GREE Livo R32 systems , each serving a separate zone. This choice offers the owner optimal flexibility : each zone can be controlled independently , promoting fine-tuned energy management adapted to the occupancy of the premises.
The wall-mounted indoor units combined with these condensers provide uniform airflow and quiet operation , while offering a discreet and modern design. Both systems operate in heat pump mode , providing both heating and cooling, with an energy efficiency (SEER) rating greater than 20 .
GREE Livo R32: performance, reliability and respect for the environment
The GREE Livo R32 series stands out for its variable speed compressor technology (inverter) , which automatically adjusts the power according to actual needs. This results in:
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reduced energy consumption ,
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increased thermal stability ,
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and extended system longevity .
Thanks to its R-32 refrigerant, this heat pump also meets the latest environmental standards , with a global warming potential (GWP) 68% lower than R-410A. It is therefore an excellent choice for Montreal homeowners concerned about energy efficiency and sustainability.
A certified facility eligible for grant programs
Like all installations carried out by AirGreen, this project fully complies with the requirements of the subsidy programs in force in Quebec, such as Chauffez vert or the incentives offered by Hydro-Québec .
GREE Livo R32 wall-mounted heat pumps , thanks to their Energy Star certification, are eligible for this financial assistance , which allows our customers to considerably reduce the net cost of their investment .
Notable technical details
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Installation location : Flat roof of a residential building, Rosemont–La Petite-Patrie
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System type : Wall-mounted heat pump (mini-split)
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Brand and range : GREE Livo R32
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Number of outdoor units : 2
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Support : Raised aluminum frames with anti-vibration rails and treated wooden boards
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Cover : brown PVC, ensuring protection and discretion
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Performance : heating down to −25°C, SEER > 20, Energy Star certified
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Power supply : 230 V
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Condensate evacuation method : gravity, thanks to the natural slope of the roof
A project delivered on time, without compromising on quality
Despite roof access constraints and spring weather conditions, our team completed the installation in a single day , including pressurization, vacuuming and operational testing.
Each unit has been calibrated for optimum performance , ensuring quiet and stable operation from the moment it is commissioned.
This rigorous approach reflects AirGreen's commitment to technical excellence and customer satisfaction . Our certified installers ensure that each system is not only high-performing, but also aesthetically integrated and easy to maintain .
Added value for the building
In addition to comfort and energy savings, this installation has increased the real estate value of the building .
New occupants now benefit from four-season comfort , a consistent interior temperature , and a significant reduction in noise and electricity consumption .
Why choose AirGreen for your HVAC installations in Montreal
At AirGreen, we combine technical expertise, attention to detail, and a commitment to the environment . Our teams are fully familiar with the realities of Montreal buildings—whether flat roofs, exterior staircases, or older structures—and adapt each installation accordingly.
Our mission is simple: to offer each customer a durable, efficient and elegant HVAC solution , installed according to the strictest standards in the industry .
AirGreen — Your trusted partner for the installation, maintenance and repair of GREE , Fujitsu , Midea , Sharp , and many other brands of heat pumps in Greater Montreal , Laval , Longueuil , the North Shore and the South Shore .