Four-season comfort in a Montreal condo, designed by AirGreen
At AirGreen , we have just installed a Sharp ZU1 wall-mounted heat pump in a modern condo in Griffintown . The goal: to provide stable, quiet, and energy-efficient heating and cooling , adapted to the realities of an urban building with exposed concrete slabs and open-plan living spaces. The result combines performance , discretion , and aesthetics , while respecting our HVAC installation standards for Montreal and the greater region.
Context: constraints of an urban condo and installation strategy
In this concrete ceiling dwelling, the main challenge lies in managing the refrigerant path and the location of the interior head to circulate the air efficiently without creating unpleasant drafts near the living area. We opted for a high installation on a load-bearing wall , slightly off-center from the television to avoid air backflow onto the screen and to preserve ambient acoustics.
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Installation height : optimal clearance under the ceiling to maximize suction and diffusion.
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Route : exit to the right of the head, discreet white cover along the upper part of the wall, then calibrated exterior drilling.
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Drainage : gravity with regular slope; flow test carried out before closing the cover.
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Drilling : controlled angle for safe condensate drainage and perfect sealing (foam, butyl tape, external sealing).
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Power supply : dedicated circuit, compliant circuit breaker, polarity and grounding verification according to RBQ/CSA standards.
The wall-mounted remote control is positioned within easy reach near the entrance, making it convenient for everyday use and protected from direct sunlight. The layout allows for even distribution to the living area and hallway, with unobstructed air intake to maintain seasonal efficiency.
Why the Sharp ZU1 series for Griffintown?
The Sharp ZU1 is a new generation wall-mounted heat pump using R-32 refrigerant , renowned for its reliability and efficiency in cold climates. It is perfectly suited to Montreal condos thanks to its compact size and very quiet operation .
Major technical advantages:
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Fine modulation inverter compressor : maintains a stable temperature, fewer on/off cycles, significant energy savings .
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Extreme cold performance : comfort guaranteed during winter episodes; flow and pressure stability to protect the compressor.
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Air quality : multi-stage filtration, dehumidification and continuous ventilation modes for a healthy interior in summer and in the off-season.
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R-32 : reduced charge and better volumetric efficiency than a previous generation fluid, while facilitating future maintenance.
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Silence : low noise levels inside and outside, essential in co-ownerships with tight block centers .
We generally recommend a capacity of 12,000 BTUs for a typical condo living space (approximately 40–55 m² depending on insulation and sunlight). Our team's load study allows us to adjust the power if the unit also needs to support an adjacent bedroom or mezzanine.
Execution details: precision, cleanliness, conformity
Our installation method follows a proven quality process :
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Taking measurements and drilling template to avoid any interference with slab reinforcement, electrical conduits or finishing elements.
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Fixing the plate on anchors adapted to the support, with level control to avoid water retention.
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Drain preparation : slope ≥ 2%, protected route; clean water tests and visual inspection of the overflow.
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Bending of copper connections with radius respected; sealing of connections by flaring , tightening torque with dynamometer .
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Nitrogen test (pressurization, bubble detection and pressure drop), then deep vacuum to eliminate residual moisture.
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Opening of valves , control of exchange surfaces and operational values (intensity, superheating/subcooling depending on context), fine adjustments.
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Finishes : capping to match the walls, UV exterior sealing, re-sealing of joints around penetrations, clean restoration.
The short line length —a compact path from the header to the outlet—reduces pressure losses and promotes optimal efficiency . The outdoor unit, with its discreet facade, is installed on anti-vibration mounts to preserve the peace and quiet of the neighborhood.
Recommended use and settings
To maintain constant comfort and optimize your energy bill:
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In winter : choose heating mode with a stable setting (e.g. 21°C). The inverter will automatically adjust the power.
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In summer : use the air conditioning mode and the dehumidification function on heavy days; a setting between 23–24°C offers an excellent comfort/economy compromise .
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Orientation of the shutters : slight angle towards the ceiling to promote the Coanda effect and diffusion in the living room area; avoid direct flow onto the sofa or TV.
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HVAC maintenance : cleaning of filters every 4 to 8 weeks during periods of intensive use; complete annual maintenance by our technicians ( electrical inspection, pressures, exchangers, condensates ).
Grants, Compliance and Guarantees
The Sharp ZU1 meets the high-efficiency criteria generally required by Quebec programs. We support our customers in:
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assess eligibility (yields, climate, building),
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prepare supporting documents (detailed invoices, installation photos, serial numbers),
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submit applications on time.
Our installations comply with RBQ and CSA standards and co-ownership requirements (time slots, noise management, facade aesthetics). AirGreen's labor is covered by a clear warranty , and we offer maintenance plans to extend the life of the system.
Result: measurable comfort and discreet integration
Upon commissioning, the room quickly reaches the setpoint and then stabilizes at low speed, with a barely perceptible noise level . The high installation and the hooded path blend into the decor, preserving the minimalist elegance of the condo. The owner now benefits from four-season comfort , improved air quality and reduced electricity consumption compared to a supplemental heater or a non-Inverter air conditioner.
AirGreen: your HVAC partner in Montreal, Laval, Longueuil, South Shore and North Shore
We design custom solutions for condos, plexes, and houses in Greater Montreal . Our experience covers wall-mounted heat pumps (Sharp, Gree , Midea , Fujitsu ), central systems , and interior systems (cassette, ducted, console). Each project is documented, verified, and delivered with settings optimized for your lifestyle.
Need a quote, a replacement or a new layout in a neighboring unit? Our team will support you from sizing to start-up , with responsive after-sales service throughout Montreal, Laval, Longueuil, on the South Shore and the North Shore .