Four-season comfort in a Rosemont plex: careful, quiet installation designed to last
Project background
In a typical Rosemont–La Petite-Patrie apartment, we installed a Gree R-32 wall-mounted heat pump to efficiently heat and cool a master bedroom overlooking the backyard. The goal: stable comfort, minimal noise, and controlled energy consumption, while respecting the interior aesthetics.
Choice of equipment
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Type : wall-mounted heat pump (mini-split) , inverter technology.
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Brand : Gree (recent R-32 range).
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Typical capacity : 9,000 to 12,000 BTU for a closed bedroom or office.
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Advantages of R-32 : better seasonal efficiency, reduced load, reduced global warming potential compared to R-410A.
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Connectivity : integrated Wi-Fi module for remote control and optimization of time slots.
Interior layout: clean, compact, strategic
The wall head is placed high above a cupboard, centered to maximize air diffusion and avoid excessively rapid returns to the probe.
Our points of attention:
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Clearances respected (ceiling and side panels) for optimal mixing and easy maintenance.
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Neat rear right drilling , with sealing ring and closed insulators on the connections.
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Condensate management : gravity with regular slope > 1%, eliminating the need for a pump and reducing noise risk.
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Acoustic treatment : anti-vibration shims and tightening control to maintain silent operation.
Route of refrigeration and electrical connections
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Estimated length : 4 to 5 m to the outdoor condenser (courtyard/balcony).
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Exterior capping : white , discreet, UV-resistant, waterproof connections for rain and snow.
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Dedicated power supply : compliant circuit breaker and cable sized according to capacity; inter-unit communication protected in the same trunking.
AirGreen installation methodology
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Brazing under nitrogen and pressure testing (≈ 450 psi) to ensure watertightness.
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High vacuum : < 500 microns with stabilization, controlled by digital vacuum gauge.
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Commissioning : flow balancing, superheat/subcooling control, condensate flow verification.
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Finishing : sealing, firestopping if necessary, and clean routing of cables.
Result for the occupant
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Immediate comfort in cooling in summer and in heating in the off-season and winter.
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Quiet in night mode thanks to the low-speed interior fan and the inverter compressor modulating the power.
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Savings : fine modulation, programming via Wi-Fi , washable filters to maintain performance.
Recommended Maintenance (and Why It Matters)
Regular HVAC maintenance preserves performance and longevity:
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Cleaning the filters and the inner head exchanger.
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Inspection of capping , connections , and condensate drainage.
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Checking the operating parameters in cold/heat mode.
We offer maintenance plans tailored to residences in Montreal, Laval, Longueuil, North Shore and South Shore .
Technical points and best practices noted on this project
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High installation ideal for freeing up the partition and better stratifying the air.
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Single clean drilling behind the unit: no visible ducting inside.
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Gravity drain : increased reliability, zero pump noise.
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Respect clearances to avoid recycling of hot/cold air .
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Service access retained (right crankcase) for future maintenance.
Grants and eligibility (depending on models)
Several high-efficiency R-32 wall-mounted heat pumps may be eligible for Quebec programs , depending on the exact model , certified performance , and building conditions. Our team verifies eligibility , prepares files , and advises on the most cost-effective power for your home.
Why entrust your HVAC installation to AirGreen?
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Specialists in wall-mounted heat pumps in Greater Montreal .
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Careful execution : waterproofing, vacuum, finishes, and aesthetic integration.
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Complete support : capacity selection, room-by-room installation advice, maintenance, and grant support.
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Local availability : teams based in Montreal , responding quickly in Laval , Longueuil , North Shore and South Shore .
Tips for your own project
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Choose the right power (BTU) based on the surface area, sunlight and insulation.
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Favor R-32 for better efficiency and lower costs.
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Take care with the location : high on a load-bearing wall or rigid partition, away from obstacles.
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Prefer gravity drain when possible.
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Schedule annual maintenance to maintain warranty and performance.
Need a wall-mounted heat pump installation in Montreal, Laval, Longueuil, on the North Shore or the South Shore?
At AirGreen , we design sustainable, clean and quiet HVAC systems , with clear monitoring and technical advice at every step.