A narrow corridor transformed into an axis of quiet comfort
Project background
At AirGreen , we are working in a Rosemont–La Petite-Patrie complex where air circulation was insufficient between the entrance and the rear living area. The high-ceilinged central hallway was becoming a thermal bottleneck in both summer and winter. The goal is clear: stabilize the temperature, reduce energy consumption, and maintain a minimal noise level in passageways.
Choice of equipment
For this type of Montreal housing, we recommend a Gree Clivia R32 wall-mounted heat pump with 12,000 BTU (typical range for open rooms and auxiliary corridors).
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R-32 refrigerant : better seasonal efficiency and reduced charge.
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Reliable heating in cold climates : capacity maintenance adapted to Greater Montreal winters.
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Quiet mode : ideal for passage areas and adjacent rooms.
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Advanced filtration : improves air quality in narrow spaces.
Air diffusion study
The positioning at the top of the corridor allows the longitudinal pulsation effect to be exploited: the treated air spreads towards the kitchen and the living room while sweeping the entrance. With a horizontal shutter adjustment + slight angle towards the rear , we avoid direct air currents on the occupants and we homogenize the temperature between the rooms.
HVAC Installation Details
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Installation height : under the ceiling, above the lintel, to free up space and optimize air intake.
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Technical drilling : clean crossing of the load-bearing wall with sheath, continuous slope for condensate drainage.
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Refrigeration path : insulated copper connections, discreet white capping matching the woodwork; fixing on anchors suitable for masonry.
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Power supply : dedicated circuit compliant with the Quebec Code, circuit breaker calibrated according to the nameplate.
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Condensate management : prioritized gravity drainage; compact pump provided as an option when natural slope is not possible.
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Finishing touches : acrylic sealant joints, paint touch-ups for careful visual integration of the wall-mounted air conditioner .
Construction site challenges and solutions
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Limited work space (narrow corridor) → use of an articulated stepladder and installation template to limit time spent at height.
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Multiple door openings → reinforced wall support and passage of connections above the doorframe to preserve circulation.
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Noise prevention → silent blocks and anti-vibration strip at the rear of the turntable.
Commissioning and adjustments
Our technicians carry out:
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Vacuum draw and leak test.
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R-32 charge verified according to actual connection length.
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Settings: Auto/Heat mode , initial setting 22°C, fixed ventilation level 2 to limit the “jet” effect.
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Quick customer training: pre-filter cleaning, service code reading, remote control and Wi-Fi app.
Observed results
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Reduction of gradients between the entrance and the living area: difference reduced to ±1.5°C.
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Very low perceived noise in the corridor and almost zero in adjacent rooms thanks to Quiet mode.
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Consumption : estimated gain of 25–35% vs. the old electric auxiliary heating in the area.
Recommended HVAC maintenance
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Pre-filters : monthly cleaning during peak periods.
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Battery and turbine : annual inspection to prevent fouling (responsible for loss of efficiency and noise).
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Refrigeration control : pressure and temperature check at each seasonal HVAC maintenance .
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Drain unblocking : annual purge to avoid summer overflows.
Program Eligibility and Compliance
Recent high-efficiency R-32 wall-mounted heat pumps are generally eligible for current Quebec subsidies , subject to performance criteria and the installation address. We guide the customer through the process (documents, proof of installation, AHRI numbers when required) and provide the correct invoice.
Practical advice for similar accommodations
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Sizing : a 12k BTU often covers hallway + open areas, but a load study avoids over/undersizing.
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Flow direction : aim for the length of the corridor and not the entrance; correct vertical oscillations in winter to limit stratification.
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Doors : Leave rooms ajar during hot spells to take advantage of circulation.
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Savings : favor a stable instruction rather than frequent variations.
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Winter : Activate preheating and smart defrosting for greater comfort in cold weather.
Why AirGreen for your project in Montreal, Laval, Longueuil, North Shore and South Shore?
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Local expertise in plexes and condominiums in Greater Montreal.
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Impeccable finishes : invisible routes, clean HVAC installation , complete tests.
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Support for subsidies and fast after-sales service.
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Recent brands and series at R-32 , ready for Quebec winters.
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