In several residential buildings in Rosemont–La Petite-Patrie , installing a heat pump requires navigating a distinctly Montreal reality: flat roofs , limited access, frequent snowfall, and high durability requirements. For this specific project, AirGreen completed the full installation of a Sharp wall-mounted heat pump directly on the roof, using a technical approach designed for performance, stability, and longevity—both summer and winter.
The objective was clear: to offer the client a reliable, quiet and efficient system, while respecting the structural and climatic constraints specific to this dense sector of Montreal.
Building context: flat roof and dense urban environment
The Rosemont–La Petite-Patrie sector is characterized by:
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low to medium-rise brick buildings,
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flat roofs covered with gravel,
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immediate proximity between buildings,
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direct exposure to wind, snow and frost.
In this context, ground-level or balcony installation was not feasible. The roof emerged as the most logical location for the outdoor unit, provided that strict rules regarding fixing, vibration isolation, and drainage were followed.
System installed: Sharp wall-mounted heat pump – Eco Inverter range
System identification
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Type : Wall-mounted heat pump (mini-split)
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Brand : Sharp
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Consistent model : Sharp ZU1
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Visible technologies :
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Eco Inverter
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Plasmacluster (Sharp signature)
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The Sharp ZU1 range is perfectly suited to Montreal urban housing, offering an excellent balance between energy efficiency, thermal comfort and stable operation during temperature variations.
Prominent installation details observed in the photo
1) Installation on an elevated aluminum structure
The outdoor unit is mounted on a robust metal frame , itself installed on treated wooden beams resting on protective bases. This configuration allows for:
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to avoid any direct perforation of the roof membrane,
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to distribute the weight safely,
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to limit the vibrations transmitted to the building structure.
2) Snow and frost management
The raised support provides sufficient clearance for:
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prevent snow from accumulating around the unit,
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to maintain optimal air exchange during defrost cycles,
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reduce the risks associated with ice in the spring.
This is a crucial point for winter reliability in Montreal.
3) Neat routing of conduits and cables
Refrigeration and electrical connections are routed in an orderly fashion, protected, and kept out of traffic areas on the roof. This meticulous approach facilitates:
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future maintenance,
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the inspections,
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the overall durability of the installation.
Why a Sharp wall-mounted heat pump on a roof?
In an environment like Rosemont–La Petite-Patrie, the choice of Sharp is essential for several reasons:
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Inverter technology ensuring precise and economical modulation,
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Quiet operation, important in a dense residential area.
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Proven reliability in varying climatic conditions
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compatibility with more complex technical installations (roof, restricted access).
The Sharp ZU1 is particularly suitable for homes requiring a discreet, high-performance solution adapted to Quebec winters.
Key steps in the AirGreen rooftop installation
Preliminary structural analysis
Before any installation, we verify:
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the load-bearing capacity of the roof,
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compatibility with municipal and union regulations,
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accessibility for maintenance and service.
Vibration isolation and stability
Even on a roof, vibration management remains crucial. We use:
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rigid supports,
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shock-absorbing materials,
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non-invasive anchoring techniques.
Commissioning and testing
Once the heat pump is running, we test:
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efficiency in heating and air conditioning,
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stability in real-world conditions,
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the noise level,
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the behavior of the system in defrost mode.
Performance and comfort all year round
Thanks to this elevated and well-planned installation, the client benefits from:
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efficient heating during the shoulder seasons and in winter,
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of fast and stable air conditioning during heat waves,
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of a discreet system, without noise pollution,
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of a sustainable solution, designed for Montreal's climate.
The AirGreen approach: technical expertise, rigor, and peace of mind
Every rooftop installation requires specific expertise. At AirGreen , we combine:
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in-depth knowledge of Montreal's built environment,
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mastery of Sharp systems
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Attention to detail at every stage.
The result: a perfectly integrated, high-performance wall-mounted heat pump ready to face the winters of Rosemont–La Petite-Patrie without compromise.