An exemplary installation on a flat roof in Sainte-Catherine, serving year-round comfort
At AirGreen, we specialize in wall-mounted heat pump installation throughout Greater Montreal, including Sainte-Catherine, a city located on the South Shore. Today, we take you to the roof of a residential building where we recently installed a SHARP ZU1 12,000 BTU wall-mounted heat pump. This unit was carefully selected for its optimal performance in harsh winter conditions, its Plasmacluster air purification technology, and its proven reliability in Quebec’s climate.
Why the SHARP ZU1 wall-mounted heat pump is an excellent choice for Sainte-Catherine?
Extreme cold performance
The SHARP AY-XPC12ZU model paired with AE-X12ZU, using the eco-friendly R-32 refrigerant, is designed to operate efficiently down to -27°C, a crucial requirement for the Sainte-Catherine area. Even at this extreme temperature, the unit maintains a heating capacity of 7,200 BTU/h, ensuring continuous comfort during the coldest spells.
Integrated Plasmacluster technology
The ZU1 model is equipped with SHARP’s exclusive Plasmacluster technology. This feature releases positive and negative ions, similar to those found in nature, allowing it to:
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Neutralize airborne viruses
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Eliminate bacteria, mold, and allergens
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Remove unpleasant odors (tobacco, pets, cooking)
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Reduce dust and fine particles
This makes the heat pump much more than just a heating or cooling device: it acts as an integrated air purifier, ideal for families sensitive to indoor air quality.
Technical details of the installed model
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Cooling capacity: 12,000 BTU/h (range: 2,800 - 13,600)
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Heating capacity: 14,000 BTU/h (range: 3,200 - 17,100)
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SEER: 21 / 22
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HSPF (IV): 12.5 / 11
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Indoor noise level: 23 to 42 dB – very quiet
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Outdoor noise level: 49 dB
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Refrigerant: R-32, low GWP
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Maximum pipe length: 20 meters
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Warranty: up to 10 years (parts, compressor, and labor)
Installation context: a winter challenge on a flat roof
This installation was carried out in the middle of winter, with partial snow cover and water runoff caused by the typical February thaws. The system was installed on an accessible flat roof at the back of a multi-unit residential building in Sainte-Catherine.
Challenges encountered:
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Snow and ice accumulation: We had to manually clear the installation area while ensuring the roof’s waterproof membrane was preserved.
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Water drainage: Thanks to SHARP’s exclusive HOT GAS PIPE system, the unit can efficiently manage defrost cycles, preventing ice buildup around the drains.
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Roof stability: We used a raised support with treated wooden bars and rubber dampers to ensure maximum stability while avoiding any direct contact with the roof.
A system designed for peace of mind
Energy security:
In case of a power outage, the Auto Restart function allows the heat pump to automatically restart with previous settings, ensuring continuous comfort without human intervention.
Connectivity:
Although this model does not include the Wi-Fi module as standard, it can be added as an option, allowing remote control via mobile app – ideal for multi-unit buildings.
Why choose AirGreen for your HVAC installation?
At AirGreen, we do much more than install HVAC equipment. We diagnose each site, select the best solution according to your needs, and guarantee a compliant, safe, and durable installation. For this project in Sainte-Catherine:
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We obtained all necessary permits.
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The installation complies with Quebec electrical standards.
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A complete startup test was performed, including inspection of refrigerant pressures, electric consumption, and ambient noise.
What our clients say
"The AirGreen team was fast, efficient, and professional. They installed everything in one day despite the snow. Since then, our home stays comfortable no matter how cold it is outside."
— Property Manager, Sainte-Catherine
Potential subsidy
This SHARP ZU1 heat pump is eligible for certain government subsidies (LogisVert, Rénoclimat, etc.), depending on the building type and income. At AirGreen, we assist you in the subsidy application process to maximize your return on investment.
Advice for South Shore homeowners
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Plan installation before the coldest periods to avoid long waiting times.
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Maintain your unit annually, especially after winter.
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Ensure proper condensate drainage in winter: good defrosting is essential for system durability.
Conclusion
This installation of the SHARP ZU1 12,000 BTU wall-mounted heat pump in Sainte-Catherine is an excellent example of our expertise in high-elevation, winter, and sensitive surface projects like flat roofs. Thanks to a combination of advanced Japanese technology, integrated air purification, and custom professional installation, AirGreen continues to demonstrate why we are a leader in HVAC in the Greater Montreal area.