A flat roof installation project: precision and reliability for comfort
At AirGreen , we carry out each HVAC installation with rigor that combines technical performance, safety and durability. This project, carried out in Côte-des-Neiges–Notre-Dame-de-Grâce (Montreal) , perfectly illustrates this approach: the installation of a Midea wall-mounted heat pump on the flat roof of a residential building.
The objective was clear: to offer an efficient, quiet air conditioning and heating solution capable of withstanding the rigors of the Montreal climate while optimizing interior space.
Site analysis and project preparation
Before any installation, our team always carries out a complete technical inspection of the site . In this specific case, several elements guided our choices:
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The flat roof required a raised structure to ensure efficient drainage of rainwater .
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The proximity of electrical conduits and the passage of refrigeration lines allowed for a discreet and well-protected installation .
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Direct exposure to sunlight in summer required precise positioning of the unit to limit compressor overheating.
So we designed a raised aluminum base with anti-vibration feet and a protective treated wood sole to distribute the weight evenly over the roof membrane.
Midea heat pump installation
The Midea outdoor unit was installed according to the brand's highest standards:
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Fixing on anti-vibration supports with stainless steel anchors.
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Installation of refrigeration lines (3/8'' and 5/8'') protected in a black UV-resistant insulating sheath.
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Installation of electrical wiring with CSA approved, accessible and waterproof disconnect box.
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Nitrogen pressure to check the tightness of the circuit before vacuuming.
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Leak test at 350 psi and draw vacuum to -30 inHg before opening the refrigerant.
System commissioning and calibration
Once the installation was complete, our certified technician proceeded with the complete commissioning :
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Check the compressor inrush current and supply voltage (240 V stable).
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Reading of working pressures (high/low) and comparison to Midea specifications.
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Indoor unit blowing temperature control: 11°C after 10 minutes of operation.
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Checking the condensate drainage and thermal insulation of the pipe.
Everything was documented with photos and technical surveys for the compliance report submitted to the client.
Result: a durable installation and immediate comfort
The rooftop installation freed up floor space while ensuring better heat dissipation . The Midea compressor, renowned for its silence and reliability , made it possible to reach the indoor comfort temperature in record time.
The client particularly appreciated the discretion of the system , both visual and audible, as well as the aesthetic quality of the finish - hidden wiring, clean insulation, perfect alignment of the supports.
AirGreen expertise: precision and compliance above all
Our technicians follow the standards of the Canadian Electrical Code and the Quebec Building Code . Each AirGreen installation includes:
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The perfect spirit level of the support, essential for the correct operation of the compressor.
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Respecting clearance distances around the condenser for optimal ventilation.
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Documented pressurization and vacuum extraction verified using a certified digital pressure gauge.
Maintenance tips for this type of installation
We advised the customer on some best practices to maintain the performance of their Midea heat pump :
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Clean the fins of the outdoor unit twice a year to prevent dust accumulation.
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Check the condition of the insulating sheath exposed to the sun.
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Ensure that clearance around the unit (minimum 30 cm) is respected at all times.
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Schedule an annual AirGreen inspection , including pressure testing, refrigerant level check and complete cleaning.
Why trust AirGreen
At AirGreen , we don't just install: we design smart, sustainable HVAC systems that are custom-calibrated for each building. Our teams operate throughout Greater Montreal , including Laval, Longueuil, the North Shore and the South Shore , for the installation, repair and maintenance of wall-mounted heat pumps, central systems, VRFs and air conditioners .
Conclusion
This Midea heat pump installation in Côte-des-Neiges–Notre-Dame-de-Grâce demonstrates our expertise and attention to detail. Thanks to thoughtful design, precise assembly, and rigorous calibration, we delivered a high-performance, quiet, and durable heating and cooling solution.
AirGreen is the assurance of careful, compliant and guaranteed work — because comfort cannot be improvised, it is built with precision.