Precise positioning for uniform comfort and immediate savings
At AirGreen , we offer complete HVAC solutions that respect the architecture of Montreal homes while maximizing performance. This intervention in Saint-Léonard illustrates a carefully calibrated Gree wall-mounted heat pump installation : an interior head installed high up, near a window, to optimize air circulation, reduce temperature strata and provide precise control of daily comfort.
Context and objectives of the project
The client wanted to efficiently air condition and heat a medium-sized living room exposed to afternoon sun. The requirements expressed were clear:
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Rapid cooling during heat waves in Montreal.
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Economical supplementary heating in the off-season to reduce the use of electric baseboards.
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Quiet operation and discreet aesthetics.
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Simple HVAC maintenance , with easy access to filters.
The Gree wall-mounted heat pump perfectly meets these criteria: inverter technology, fine modulation of power, discreet digital display for instant reading of the setpoint, and an excellent compromise between energy efficiency and sound comfort.
Choosing the location of the inner head
The positioning of a wall unit determines 80% of the user experience. Here we are choosing a high installation, a few centimeters from the ceiling , along a clear wall:
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Optimal air sweeping: by blowing under the ceiling, the treated air flows along the wall then falls gently, which avoids direct air currents on the occupants.
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Proximity to an opening (window): strategic location to counter solar gain and smooth out temperature variations, while preserving the thermal stratification of the volume.
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Accessibility for maintenance: sufficient clearance to clean filters, check condensate drainage and carry out annual maintenance.
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Compliance with manufacturer clearances: lateral and upper distances respected to ensure good air flow and facilitate hood extraction during interventions.
Installation details — indoor unit
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Fixing and leveling: we install the mounting plate on anchors adapted to the type of wall (brick, plasterboard on frame, wood). A laser guarantees perfect horizontality to prevent vibration noise and ensure gravity flow of condensate.
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Clean drilling : a through drilling (≈ 65 mm) is made behind the head, with a protective sleeve and vapor barrier for sealing. The slope is oriented outwards to promote gravity drainage without a pump.
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Refrigeration connections : copper tubes deployed without tight bends, brazed under nitrogen, high-density continuous insulation to limit losses and avoid surface condensation.
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Communication and power supply cabling : routing grouped with the refrigeration lines, controlled tightening of the terminal blocks, clear marking for possible diagnostics.
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Interior finish : minimal visible capping (the drilling is hidden by the back of the unit). We ensure discreet integration on the wall, without visible cables.
Installation details — outdoor connection (overview)
Although the emphasis here is on the inner unit, the entire performance depends on the complete journey :
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Short wall crossing to the outside, reducing the length of the connections (often 2 to 4 m), which improves efficiency .
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Exterior waterproofing with compatible mastic and collars, to protect the building envelope against water and air.
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Path to the condenser : UV capping on the outside, expansion loops respected, curvature radius in accordance with Gree specifications.
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Dedicated power supply : circuit breaker conforming to the manufacturer's recommended rating, cable section checked, grounding.
Commissioning and performance checks
Rigorous commissioning guarantees the longevity of the installation:
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Nitrogen leak test and deep vacuum with vacuum stability control.
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Opening the valves and checking the operating pressures.
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Indoor fan calibration and testing in cooling and heating modes.
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Functional measurements : supply/return temperatures, intensity, noise level.
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Programming : instructions, automatic mode, speed, shutter orientation; explanation to the customer on optimal use (stable instructions, window opening management, night mode).
Result: consistent comfort and reduced operating costs
In this room in Saint-Léonard, the wall-mounted heat pump offers:
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Rapid cooling during heat waves, with a uniform sensation thanks to the Coandă effect of the breath.
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Effective supplemental heating on cool autumn mornings or evenings, reducing the use of baseboards.
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Quiet operation : The Gree unit at reduced speed maintains a low noise level , suitable for rest or work rooms.
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Easy-to-read digital display confirms the instruction and simplifies daily use.
AirGreen Best Practices for Wall-Mounted Heat Pumps
To maintain performance and protect your investment, we systematically apply:
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Choice of location favoring air diffusion rather than ease of drilling.
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Gravity drainage as soon as possible (reliable, silent, without additional electricity consumption).
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Continuous insulation of refrigerant lines and anti-vibration fixings .
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Quality controls at each stage: tightening torque, sealing, vacuum, wiring.
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Documentation provided to the customer : filters, maintenance frequency, warning signs to watch for, after-sales service contact details.
HVAC Maintenance: What We Recommend to the Customer
Well-planned HVAC maintenance avoids surprises:
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Clean filters every two to four weeks during peak season.
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Annual inspection : pressure/refrigerator, electrical tightening, battery cleaning, condensate check, updating of external seals.
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Good practice : avoid extreme settings; aim for a stable temperature (often 22–24°C in summer, 20–22°C in mid-season) to limit short cycles.
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Clearance around the head: do not block the intake with tall furniture or thick curtains.
Grants and performance
Many Gree models eligible for wall-mounted heat pumps offer very good seasonal performance, particularly in low-temperature heating. Depending on the configuration chosen and the criteria in force, the project may benefit from subsidies applicable in the greater Montreal area, Laval, Longueuil, North Shore and South Shore . During our visits, we confirm eligibility , explain the procedures and provide the necessary documents ( AHRI number, technical data sheets).
Expert advice for superior comfort
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Solar gain management : Using blinds/curtains during peak sunlight reduces cooling load and improves actual SEER .
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Open doors : to air condition several adjoining rooms, let the air circulate; otherwise, consider a multi-zone .
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Dehumidification mode (Dry) : useful on humid days to improve the feeling of freshness without lowering the setpoint too much.
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Winter : for heating, maintain a stable setting ; avoid frequent switching between Off and On which reduces efficiency.
Why AirGreen in Saint-Léonard (and throughout Greater Montreal)
We combine installation engineering , attention to detail , and after-sales service . Our team understands the unique characteristics of Montreal homes and plexes, from load-bearing brick walls to delicate interior finishes. Each HVAC installation is designed to last: high performance, clean finishes, easy maintenance, and documented electrical and refrigeration compliance.
Whether you are in Montreal , Laval , Longueuil , on the North Shore or the South Shore , we adapt the solution to your building, your lifestyle and your budget, with clear and comparative proposals.
Conclusion
This Gree wall-mounted heat pump installation in Saint-Léonard demonstrates the importance of thoughtful placement and careful execution. The result: consistent comfort , quietness , energy savings , and a system ready to operate reliably in both summer and winter, with quick and easy HVAC maintenance .