Discreet and elegant four-season comfort, designed for typical Montreal condo living
At AirGreen , we are responsible for the HVAC installation of a Sharp ZU1 wall-mounted heat pump in a bright home in Plateau-Mont-Royal . The client's goal: to stabilize the temperature all year round , reduce their electricity bill, and preserve the interior aesthetics without compromise. Our mandate covers the selection of the device , the routing of the connections , commissioning and maintenance advice , with the same quality requirements that we apply everywhere in Montreal, Laval, Longueuil, on the North Shore and the South Shore .
Why the Sharp ZU1 for a Plateau condo?
The Sharp ZU1 (R-32) is a new generation wall-mounted heat pump designed for comfort in cold climates and compact spaces. It offers:
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Stable heating in very cold weather thanks to the inverter compressor and fine regulation algorithms;
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High energy efficiency (low GWP R-32 technology), guaranteeing concrete savings;
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Quiet operation inside and out, a major advantage in a plex or condo;
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Even diffusion thanks to the long-range motorized shutter, ideal for open kitchen-living room areas;
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Simplified maintenance with accessible filters and protected electronics.
On the Plateau, where the architecture often imposes limited routes and tight clearances, the ZU1 stands out for its compactness and flexibility of installation .
Context and customer expectations
The owner regularly works from home. In summer, overheating on the sunny side becomes uncomfortable; in winter, the basic electric heating consumes too much. His request:
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Quickly cool the living room opening onto a patio door;
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Ensure efficient heating until the first serious cold spells;
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Preserve the visual sobriety of freshly painted walls;
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Remain eligible for grants where possible.
After thermal assessment and electrical inspection, we validate the Sharp ZU1 (R-32 wall-mounted range) with a capacity adapted to the surface area and solar gains of the home.
Preparation: precision, safety, cleanliness
Positioning analysis
We are aiming for a high installation under the ceiling, on the living room side, with clearance for the shutter and a free blowing line . This position allows:
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an air sweep that covers the living area and the dining area;
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a shortcut to external connections , therefore fewer losses;
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reliable gravity drainage for condensates in air conditioning mode.
Construction site protection
Before any work, we protect the furniture and flooring. Drilling is done with dedicated drill bits, and the peripheral sealing is treated with an air barrier and HVAC-compatible sealant .
Installation details: a clean, safe and aesthetic route
Interior head and finishes
The Sharp head is fixed to its wall plate with level proofs and anchors adapted to the support. We respect the lateral clearances for maintenance and sweeping. The interior cover is white , discreet, and follows the wall to the exit point; the bending radius of the connections is wide to protect the refrigerant insulation and the communication cables.
Drilling and crossing
A single oblique drilling towards the outside ensures the exit of the insulated copper pipes , the power/communication cable and the condensate drain . The angle guarantees gravity drainage towards the outside: no pump is necessary, therefore less noise and less maintenance .
Refrigerant connections and power supply
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Torque-controlled flared brass , with tightening torques according to the manufacturer's table;
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Deep vacuum up to the recommended threshold, vacuum resistance verified;
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Preliminary nitrogen test and leak detection ;
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Protected wiring , section conforming to the dedicated circuit breaker ;
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Perfectly plated interior capping : linear finish , no burrs.
Outdoor unit (reminder of good practices)
Although our story focuses on the interior, our teams place the outdoor unit on galvanized brackets or a clear slab , with clearances for air flow, snow guards if necessary and silent blocks to limit vibrations. The exterior path is harmonized with the facade (appropriate color cladding) in order to respect the aesthetics of the building.
Commissioning: the AirGreen signature
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Long-term vacuum , controlled stabilization;
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Fluid opening and pressure/temperature readings ;
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Calibration of parameters, verification of condensates in cold mode;
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Measurement of intensities and electrical validation ;
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Functional tests in heating and air conditioning modes.
We then provide the customer with the operating instructions and the HVAC maintenance plan.
Result: immediate comfort and controlled bill
As soon as it is switched on, the ZU1 lowers the temperature in the day area in just a few minutes; the sensor prevents temperature fluctuations and maintains a pleasant stability . In winter, the temperature rise is gradual and silent, and dehumidification in summer improves the feeling of comfort without overcooling.
Aesthetics and integration: invisible when needed
On a white wall, the Sharp head, with its discreet design , fits naturally. The interior cover follows the vertical near the patio door : it passes cleanly and does not interfere with the blind or the opening. The ducts remain flush , and all the collars are installed at regular intervals for a taut line.
Recommended maintenance: maintain performance over time
A well-maintained system consumes less , lasts longer and remains quiet . Our recommendations:
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Filters : vacuum or wash every 4 to 6 weeks during intensive periods;
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Internal exchanger : annual professional cleaning (gentle degreasing, controlled rinsing);
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Outdoor condenser : clear leaves/snow, never obstruct the grilles;
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Connections : annual check of tightening torques and condition of insulation ;
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Drain : flow test in spring before the heatwave.
AirGreen offers maintenance packages covering Montreal, Laval, Longueuil, the North Shore and the South Shore .
Best practices and pitfalls to avoid in a Montreal plex
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Always favor gravity drain when the architecture allows it: more reliable and quieter than a pump.
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Limit the length of the connections : better efficiency, less pressure losses.
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Respect the clearances around the units: air must circulate freely.
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Protect the insulation from UV rays on the outside and from crushing in the corners.
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Calibrate the BTU power to the actual envelope: an oversized unit cycles too short and dehumidifies poorly.
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Validate the electrical circuit : compliant circuit breaker and wire gauge, dedicated circuit .
Grants and financial benefits
High-efficiency wall-mounted heat pumps operating on R-32 are generally integrated into Rénoclimat 's programs and can be aligned with the energy transition programs in effect in Quebec. We help our clients document the work , preserve evidence and optimize demand . Residents of Montreal, Laval, Longueuil, the North Shore and the South Shore benefit from an accelerated payback time , combined with the operating savings offered by the Inverter.
Why AirGreen for your HVAC installation in Plateau and elsewhere?
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Specialists in wall-mounted heat pumps in Montreal plexes;
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Exemplary finishes (aligned hoods, clean seals, impeccable levels);
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Respect for deadlines and neighbors (reduced noise and traffic);
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Accessible after-sales service and planned HVAC maintenance ;
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Regional coverage : Montreal, Laval, Longueuil, North Shore and South Shore .
Conclusion
This installation of a Sharp ZU1 in Plateau-Mont-Royal embodies our way of working: listening to needs , choosing recent R-32 equipment , clean and reliable process , meticulous commissioning , then long-term support . The result: discreet four-season comfort , preserved aesthetics , and a controlled energy bill - exactly what condo and plex owners are looking for in Greater Montreal.