A technical installation on a flat roof in the heart of the city center
At AirGreen , we recently completed the installation of a Fujitsu Airstage central heat pump in a residence located in Ville-Marie . This project illustrates the unique challenges associated with urban buildings with flat roofs, where space optimization and solid support are essential to ensure the performance and longevity of the equipment.
Project background
The client was looking for a reliable heating and cooling solution capable of meeting the needs of a home in the heart of downtown Montreal. The main criteria were:
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Performance in all seasons , even in extreme cold.
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Discreet installation to preserve interior living space.
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Durability and resistance to climatic constraints specific to Montreal flat roofs (snow, wind, rain).
Choice of equipment
The Fujitsu Airstage central heat pump was distinguished by:
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Its advanced VRF (Variable Refrigerant Flow) technology allows the power to be adapted according to actual needs.
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Its high energy efficiency , reducing annual operating costs.
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Its compatibility with Quebec grant programs related to energy-efficient systems.
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Proven robustness for exposed outdoor installations.
Installation Steps
1. Preparation of the support on a flat roof
The outdoor unit was fixed on a raised metal base , itself placed on treated beams resting on protective pads. This assembly ensures:
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Perfect stability even in strong winds.
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Protection against the accumulation of snow and water on the roof.
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Optimal weight distribution to preserve the watertightness of the roof covering .
2. Routing of refrigerant connections
The refrigeration pipes and electrical cables were routed through a discreet technical entrance , minimizing the length of the connections and thus reducing energy losses. Particular care was taken in insulating the pipes to avoid any unwanted condensation.
3. Condensate management
On a flat roof, drainage is always a challenge. We have integrated a solution allowing efficient evacuation of condensate , without the risk of stagnation or infiltration into the building.
4. Commissioning and calibration
Our technicians carried out:
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Pressure tests to ensure the network is watertight.
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Electronic verification of parameters to ensure optimal performance.
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Calibration of the air flow according to the zones served by the central heat pump.
Challenges encountered and solutions provided
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Limited roof access : equipment was transported using a suitable lifting system, avoiding any disruption to occupants.
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Climate constraints : the installation was planned to comply with the safety conditions for working at height in an urban environment.
Results obtained
The customer now benefits from:
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Consistent comfort in all seasons , thanks to the intelligent modulation of the Fujitsu Airstage.
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A durable and secure installation , designed to withstand Montreal's harsh winters.
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A significant reduction in energy costs and carbon footprint.
Why choose AirGreen for your flat roof installations?
Our teams are experts in complex HVAC installations in dense urban environments. Whether in Montreal, Laval, Longueuil, on the North Shore or the South Shore , we adapt each project to the building's real-world constraints:
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Proven technical expertise in central heat pumps and VRF.
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Compliance with safety and waterproofing standards .
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Complete support , from system selection to optimization for subsidies.