A perfectly calibrated roof installation for lasting comfort
At AirGreen , every HVAC installation is planned down to the smallest detail. This project in Lachine , in the West Island of Montreal, perfectly illustrates our technical and methodical approach: the complete installation of a Zephyr wall-mounted heat pump , with an outdoor unit mounted on a gravel roof. The client's goal: to benefit from a system that is efficient, quiet, and perfectly stable despite variable weather conditions.
Project context: an old system to be replaced
The client had an older wall-mounted air conditioner that had become unreliable and energy-intensive. After analysis, our team recommended replacing it with a Zephyr wall-mounted heat pump —an ideal choice for four-season use.
The Zephyr is known for:
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Its high energy efficiency (SEER 21) ,
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Its stable performance down to -25°C ,
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And its Inverter technology , guaranteeing constant comfort with low electricity consumption.
Site preparation: safety and stability above all
The unique feature of this project was the site configuration: the outdoor unit had to be installed on a flat roof covered with gravel .
Our technicians therefore have:
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Checked the strength of the roof membrane to ensure that no point loads would compromise the waterproofing.
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Constructs a raised and reinforced base using treated timber beams and galvanized metal rails.
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Integrated anti-vibration pads under the support legs to eliminate any vibration transfer to the building structure.
This sturdy foundation ensures the unit's stability even during strong winds or freeze-thaw cycles.
Zephyr Condenser Installation
The Zephyr outdoor unit was then precisely positioned, the copper refrigeration fittings carefully bent to avoid any mechanical stress.
Our technicians have:
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Pulled the refrigerant lines to the indoor unit through a sealed sheath,
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Insulated the ducts with high density UV resistant foam,
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And installed a dedicated circuit breaker in an outdoor junction box, in accordance with the Canadian electrical code.
Each step was validated by a nitrogen pressure check to ensure the circuit was watertight.
System commissioning and calibration
Before switching on, a complete vacuum was carried out to eliminate all traces of humidity.
Once the R-410A refrigerant charge was checked and balanced, we proceeded to start up the system and perform a performance test:
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Outlet air temperature: 7.5°C (in air conditioning mode),
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Exterior noise level: barely 54 dB ,
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Stable initial consumption, confirming excellent performance.
The customer immediately noticed the reduction in noise compared to his old system, as well as a rapid increase in comfort.
Finishing touches and final inspection
At AirGreen, each installation ends with a complete inspection:
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Checking electrical connections and mechanical fixings ,
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Cleaning of work areas ,
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Explanation of the operation and modes of the Zephyr remote control ,
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And product registration for manufacturer's warranty.
We also installed a service protection cover to protect the fittings from sun and rain, extending the durability of the system.
Result: a clean, stable and efficient installation
The new Zephyr system fully meets customer expectations:
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Fast and even cooling,
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Efficient heating even at low temperatures,
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Quiet and energy efficient.
The client particularly appreciated the stability of the support and the careful finish, highlighting the quality of the intervention and the precision of the assembly on technical terrain.
Why choose AirGreen for your heat pump installation in Montreal
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Certified and experienced technicians on the brands Zephyr, Midea, Fujitsu, Gree, Trane and Sharp.
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Strict compliance with Canadian HVAC installation standards .
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State-of-the-art measuring and sealing equipment for optimal performance.
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Fast and courteous service in Montreal, Laval, Longueuil, on the North Shore and the South Shore .
Each installation is accompanied by performance monitoring and personalized recommendations based on the building's configuration.
Conclusion
This installation of a Zephyr wall-mounted heat pump in Lachine perfectly illustrates AirGreen 's expertise: a meticulous approach, sustainable materials, and a constant search for efficiency and reliability.
Thanks to this commissioning, the customer now benefits from a high-performance and quiet system , ready to offer four-season comfort while reducing its energy consumption.