Four-season comfort, designed for a bright corner room and created with the AirGreen finish
Context: Suburban house, corner room and need for thermal stability
At AirGreen , we are working on a single-family home in Sainte-Thérèse ( North Shore ). The main room has two constraints: an exterior wall with a window and a ceiling angle where the air tends to stagnate in winter. The owner wants a unique solution to air condition in the summer and heat in the off-season while reducing noise and operating costs. We recommend and install a Gree wall-mounted heat pump – R32 range (inverter), compatible with extreme cold and perfectly suited to the typical residential volumes of Greater Montreal .
Why a Gree wall-mounted heat pump (R-32) for this configuration?
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Compact and aesthetic : a discreet interior head, placed at the top of the wall, which fits in without heavy work.
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High seasonal efficiency thanks to inverter technology and R-32 refrigerant, more efficient than R-410A.
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Uniform comfort : fine modulation of the fan and adjustable shutter to sweep the corner room and break up pockets of cold air near the window.
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Eligibility for grant programs generally available for high-efficiency heat pumps in Quebec (validation on a case-by-case basis depending on the exact model and criteria in force).
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Local technical support : parts and service available quickly in Montreal, Laval, Longueuil, North Shore, South Shore .
Capacity sizing and selection
We size the capacity based on:
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the actual surface area of the corner room and communications with the corridor,
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northwest-facing windows , which generate winter heat loss,
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from a reliable heating objective to the intense cold experienced on the North Shore .
The result is a wall-mounted power output in the range of 9,000 to 12,000 BTU/h (depending on the loads and insulation measured), sufficient to cover the room and stabilize the adjacent corridor without oversizing. Modulation prevents short cycles and maintains a very low noise level in steady state.
Implantation of the inner head: the high angle, a controlled choice
We place the wall head in the upper part, as close as possible to the ceiling , on the corner side of the room. This installation has several advantages:
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Optimal airflow along the walls: the primary jet runs along the ceiling then gently descends, which smooths the temperature near the window.
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Clearances respected to ensure the upper air intake and the opening of the shutter.
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Free service access for HVAC maintenance: filter cleaning, evaporator inspection and condensate tray.
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Condensate management by gravity drain with continuous slope, avoiding the addition of a pump (therefore less maintenance and no additional noise).
Refrigeration and electricity route: short, direct, neat
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Drilling behind the unit for direct penetration to the exterior wall.
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Set of insulated refrigeration lines and discreet white cladding inside and out for a clean finish on light-colored walls.
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Typical total length of 5 to 8 meters: immediate exit at the back of the head, external descent towards the condenser location, compliant anti-vibration loops.
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Dedicated 208/230V power supply with circuit breaker and disconnector installed near the condenser for safety and maintenance.
Outdoor condenser: durability and Nordic winter
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Installation on anti-vibration wall brackets to free the unit from the snow cover and facilitate the evacuation of defrosting water.
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Clearances respected at the rear and front to ensure free air discharge and easy service.
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Snow management : adequate elevation, orientation away from prevailing winds, and snow protection when exposure requires it.
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Drip tray or defrost pipe to permitted area if environment requires (driveway, walkway).
Commissioning and fine-tuning
Our technician performs:
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Leak test and vacuum draw to specified, stabilized values before opening the fluid.
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Power on and control of intensities .
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Comfort settings :
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Auto speed and wide horizontal scan ,
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night eco setting slightly raised in summer and lowered for heating in winter,
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option lock to prevent accidental manipulation.
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Acoustic and airflow validation: no whistling, no corner resonance.
Results: comfort, silence and savings
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Temperature uniformity felt a few minutes after switching on: the cold angle disappears, comfort near the window improves significantly.
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Very low interior noise level ; modulation maintains almost inaudible operation in stabilized regimes.
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Reduced summer costs vs. window/portable units and shoulder-season savings vs. electric space heaters.
HVAC maintenance: maintaining performance and longevity
What the owner does
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Gentle vacuuming of the filters every 4 to 6 weeks during periods of intensive use.
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Maintain a clearance of 1 m free in front of the head, dust the visible fins with a microfibre cloth (without aggressive products).
What we do
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Annual AirGreen maintenance : pressure/temperature check, exchanger cleaning, gravity drain check, defrost test, tighten electrical connections and update parameters if necessary.
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Archived maintenance report for warranty and useful when applying for grants .
Best practices specific to corner pieces
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Orient the shutter slightly towards the opposite wall to break up dead zones .
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Auto speed and occasional Dry mode in spring to prevent residual humidity without overcooling.
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In heating, continuous low ventilation to mix the air near the window and avoid the sensation of a cold wall.
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Interior doors left ajar if you want to spill out into the hallway.
Grants and eligibilities (reminder)
Depending on the capacity and performance data sheet of the R32 range , the system may be eligible for the support programs in effect for the North Shore and Greater Montreal . We assist with the cleaning of the technical file (performance, minimum operating temperature) and invoicing for the territories of Montreal, Laval, Longueuil, North Shore, South Shore . Final eligibility depends on the official criteria in effect at the time of the request.
What we deliver in concrete terms
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A clean and durable HVAC installation : insulated lines, discreet casing , anti-vibration mountings, external disconnect switch , complete documentation.
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Tailor-made comfort configured during commissioning and easily adjusted by the occupant.
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Follow-up : maintenance reminders, seasonal advice and rapid availability of Gree parts via our network.
Frequently Asked Questions (Practical Version)
Can we power a second room?
The wall-mounted head primarily treats the corner room and extends into the hallway. For multiple closed rooms, we offer MultiZone R32 solutions with two or three heads.
What happens during extreme cold?
The Gree R32 heat pump maintains useful heating at low temperatures; for extreme episodes, protection consists of maintaining a realistic setpoint and, if present, a minimal electrical backup.
Is there a risk of outside noise?
The condenser is separated by buffers, placed with clearances and oriented away from rest areas; the noise level remains compatible with the residential neighborhood.
Why AirGreen in Sainte-Thérèse and across the North Shore
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Local expertise : we know the winter constraints and the morphology of the homes on the North Shore .
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Recognized finish : precise drilling, careful sealing , clean management of gravity condensate .
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Complete support : from thermal study to HVAC maintenance , including subsidy advice .
Strategic keywords : wall-mounted heat pump , Gree R32 , HVAC installation , HVAC maintenance , Sainte-Thérèse , Montreal , Laval , Longueuil , North Shore , South Shore .