Wall-Mounted SHARP ZU1 12,000 BTU Heat Pump Installed on a Flat Roof of a Residential Building in Île-des-Sœurs

An installation designed for Quebec’s harsh winters, built for durability and energy efficiency

At AirGreen, we specialize in installing high-efficiency wall-mounted heat pumps throughout Greater Montreal, including Île-des-Sœurs, a residential sector known for its modern buildings and year-round thermal comfort needs. Today, we’re showcasing a rooftop installation of a SHARP ZU1 12,000 BTU wall-mounted heat pump, a high-performing and eco-friendly model that’s perfectly suited to the extreme weather conditions of our region.

A well-thought-out project: SHARP ZU1 heat pump installed on an elevated roof support

For this project in Île-des-Sœurs, we installed the outdoor SHARP ZU1 unit on the flat roof of a residential building. In winter, rooftop installations require careful attention to several technical details:

• Elevated galvanized support: To prevent snow accumulation around the unit and ensure proper drainage.

• Insulated pads and treated wood blocks: To stabilize the equipment on the roof membrane without puncturing it.

• Strategic positioning: The unit was placed to shield it from prevailing winds, allowing for natural defrosting.

This type of rooftop installation is ideal for multi-unit buildings where ground space is limited. It also ensures better air circulation around the outdoor unit, which is critical for proper heat pump operation—especially during cold spells.

Why choose the SHARP ZU1 12,000 BTU wall-mounted heat pump?

This ZU1 model from SHARP stands out for its outstanding performance, even in northern climates. Here are the key technical specifications:

Thermal performance:

• Heating capacity: 14,000 BTU/h

• Maximum capacity at -27°C: 7,200 BTU/h

• Operates efficiently down to -27°C, with consistent output even during the extreme winter temperatures common in Montreal, Laval, Longueuil, the North Shore and South Shore.

Energy efficiency:

• SEER 22 / SEER2 21 (cooling)

• HSPF up to 12.5 (heating)

• Uses R32 refrigerant, which is far more eco-friendly than R410A, with a global warming potential two-thirds lower.

Exclusive Plasmacluster technology:

• Neutralizes bacteria, viruses, allergens, and mold in the air.

• Improves indoor air quality—an essential benefit for families living in densely populated urban areas.

Compact and quiet design:

• Indoor unit weight: only 22 lb (10 kg)

• Indoor sound level as low as 23 dB, making it perfect for bedrooms or quiet areas.

Unique installation challenges in Île-des-Sœurs

Île-des-Sœurs presents particular features that influence HVAC installations:

• Tall buildings with flat roofs accessible only via stairs or technical elevators.

• Need for strict compliance with structural and waterproofing standards (elastomer membranes, parapets, etc.).

• Strong prevailing winds off the St. Lawrence River require precise outdoor unit placement.

Our technicians carried out:

• A non-invasive anchoring check (installation on treated wood blocks and rigid foam pads, no membrane perforation).

• Routing of refrigerant lines and power cables through sealed conduits from the indoor unit to the roof via the building’s technical shafts.

Installation steps – the AirGreen approach

1. Preliminary inspection of roof structure and accessibility.

2. Installation of the indoor wall unit inside the apartment, positioned for optimal comfort and discreet aesthetics.

3. Hoisting of the outdoor unit and its supports to the rooftop using appropriate lifting gear.

4. Connection of refrigerant lines, electrical wiring, and drain pipes, with sealed rooftop penetrations.

5. Full system startup, including pressure testing, leak testing, and performance verification.

6. Customer walkthrough on system usage, maintenance tips, and smart control options (Wi-Fi is built into all SHARP models).

Eligible for LogisVert Grant

This installation qualifies for Hydro-Québec’s LogisVert program, offering grants of up to $1,350 to $2,172 depending on the building type and model installed. The SHARP ZU1 is AHRI-certified, ensuring full compliance to receive financial assistance.

Why choose us for your project in the Greater Montreal area?

At AirGreen, we install heating, ventilation, and air conditioning (HVAC) systems across the Greater Montreal region, including:

• Montreal

• Laval

• Longueuil

• North Shore: Blainville, Boisbriand, Terrebonne, etc.

• South Shore: Brossard, Saint-Hubert, Sainte-Julie, etc.

We stand out thanks to:

• Personalized service for every building (residential or multi-unit).

• Advanced technical expertise for complex rooftop installations.

• Top-quality equipment including SHARP, Fujitsu, Gree, Bosch, Lennox, and many more.

• A certified, continuously trained team, with strict adherence to installation standards.

Maintenance tips to extend the life of your SHARP ZU1

• Clean the indoor filter regularly (at least once a month).

• Check the drainage after winter to prevent blockages.

• Have the outdoor unit inspected every spring to prevent corrosion and maintain optimal performance.

• Schedule an annual preventive maintenance visit with AirGreen for long-term reliability.

Conclusion: Durable and intelligent comfort with the SHARP ZU1 heat pump

This SHARP ZU1 12,000 BTU wall-mounted heat pump installation in Île-des-Sœurs is a perfect example of AirGreen’s ability to design high-performance HVAC solutions, even in complex urban environments exposed to extreme cold. Thanks to our expertise and attention to detail, this customer now enjoys optimal thermal comfort, superior air quality, and total peace of mind—year-round.