Discreet comfort in co-ownership: a clean, efficient project designed to last
At AirGreen , we install heat pumps that blend seamlessly into the interior design while delivering consistent performance year-round. This project in Nun's Island (Montreal) features a Sharp ZU1 series wall-mounted heat pump, installed high on the wall near a large bay window. The result: a bright, precisely temperature-controlled living space without compromising on aesthetics.
The customer's need and our recommendation
The owner wanted:
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efficiently air-condition and heat the living-dining area facing the river;
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reduce temperature differences linked to afternoon solar input;
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minimize noise and visible elements.
We proposed a Sharp ZU1 series for its fine modulation, low noise level and Plasmacluster filtration, which is appreciated in urban environments. The sizing takes into account the glazed volume, the occupancy rate and the internal loads (electronics, lighting).
Interior integration: controlled diffusion and careful finishing
Location. The indoor unit is positioned at the corner of the exterior wall , under the ceiling, above the curtain return. This location avoids direct airflow onto the occupants and sweeps the ceiling to distribute air evenly towards the TV area and reading corner.
Clearances. Sharp's recommended side and top clearances are met, ensuring maintenance access and optimal air intake.
Processing of connections.
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Single rear drilling (Ø ≈ 65 mm), invisible once the head is fitted.
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Short refrigeration line (≈ 3 m) limiting pressure losses and improving seasonal efficiency.
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Gravity drain with continuous slope towards the outside; installation of a non-return valve to prevent any entry of cold air in winter.
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Power and communication cables bundled, sheathed and mechanically secured to eliminate vibration.
Aesthetic.
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Flush-mounted crossing cover, sealed with acrylic painter's putty .
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No visible channel inside: the finish remains refined around the mirror and the TV niche.
Outdoor installation: silence and compliance in co-ownership
In co-ownership on Île-des-Sœurs , acoustic control and compliance with building regulations are essential.
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Outdoor unit placed on anti-vibration support on the private balcony, rear and side clearance respected.
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10mm neoprene pads and rubber spacers under the base to break the solid transmission.
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Condensate drain cable protected against frost; discharge away from pedestrian paths.
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Disconnect box within visual range of the device, compliant with the Quebec Electrical Code.
AirGreen Methodology: Precision and Controls
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Nitrogen test at 350 psi, stabilized, no drop.
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Deep vacuum ≤ 500 microns, hold for 15 min, then static leak test.
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Tightening to the torque specified by Sharp (flare fittings).
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Settings : setpoint, auto-swing mode, silent speed, locking of sensitive functions.
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Final checks : overheating/subcooling, intensity, supply/return temperature, perceived noise.
These steps ensure stable operation, increased compressor longevity and high efficiencies in heating and cooling modes.
Performance and concrete benefits for the customer
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Fine regulation thanks to the inverter: the machine adapts its power to the solar input from the bay window.
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Quiet in real use : low speed in the evening, conversation and TV viewing preserved.
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Air quality : Plasmacluster filtration, useful against cooking odors and fine particles.
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Savings : in mid-season, the heat pump advantageously replaces electric convectors.
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Uniform comfort : Tangential airflow along the ceiling eliminates hot spots near the window and cool spots on the corridor side.
Best practices that we apply in glass facades
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Comfort probe positioned to avoid false signals due to direct solar radiation.
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Shutter orientation : wide horizontal sweep, moderate vertical angle to limit air projection on the curtains.
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Multimedia cable management near the TV: no crossing with the refrigerator line, reducing the risk of subsequent drilling when wall anchoring.
HVAC Maintenance: The Simple and Effective Plan
Regular HVAC maintenance maintains efficiency and silence:
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Filters : Gentle vacuuming every 4 to 6 weeks; washing in warm water and drying thoroughly.
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Tray and drain : check the slope and rinse at the start of summer.
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Exchanger : annual professional cleaning to prevent lamellar fouling.
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Outdoor unit : clearing of grilles (leaves, snow), visual inspection of anti-vibration mounts.
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Annual AirGreen visit : electrical check, thermometry, static pressure, tightening, parameter updates.
Tips for use and pitfalls to avoid
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Avoid installing rods or supports in the axis of the crossing; keep 15 cm of free clearance.
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Do not point the shutters directly towards the curtains : risk of local condensation and annoying ripples.
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In winter, favor a stable setting (20–21°C) rather than sudden variations which increase consumption.
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If a fireplace is used, keep the ventilation low so as not to disrupt the draft.
Grants and support
High-performance wall-mounted heat pumps may be eligible for current programs ( LogisVert Hydro-Québec , local assistance). Our team assists with the selection of eligible models, the collection of proof of HVAC installation and the submission of files for customers in Montreal , Laval , Longueuil , North Shore and South Shore .
Why AirGreen for your project in Île-des-Sœurs and Greater Montreal?
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Management of co-ownership construction sites : communication with the union, work slots, acoustic requirements.
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Premium finish : clean drilling, watertight seals, discreet exterior capping , short paths.
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Rigorous sizing : calculation of loads with glazed surfaces and actual exposures, choice of BTU capacity which avoids over- or under-sizing.
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Structured after-sales service : HVAC maintenance reminders, seasonal optimization and rapid technical assistance.
Balance sheet
This Sharp wall-mounted heat pump installation in Nun's Island delivers stable temperatures, exemplary acoustics, and a meticulous interior finish. The living room enjoys precise comfort, summer and winter, while consumption remains contained thanks to inverter modulation and optimized cooling length. This is exactly the level of quality that AirGreen advocates for every project in Greater Montreal .