A central passageway transformed into a smart comfort zone: our team positioned a GREE wall-mounted head above a door frame to efficiently cool and heat two adjoining rooms, without sacrificing aesthetics.
Client background and objectives
In Rosemont–La Petite-Patrie, in a bright, typical Montreal apartment, the client wanted four-season comfort with a discreet, quiet, and energy-efficient unit. The interconnecting layout (living room ↔ bedroom/office) called for cross-ventilation and precise positioning to avoid dead zones.
Choice of equipment
We are choosing a GREE wall-mounted heat pump – R-32 series , a recent residential range, with high seasonal efficiency. Its advantages:
-
R-32 refrigerant, reduced charge and better heat transfer.
-
Extreme cold heating mode suitable for Montreal's climate.
-
Inverter technology to modulate power and limit consumption.
-
Very low indoor noise level, ideal for an office/bedroom.
Targeted result: temperature stability , lower bills compared to resistive devices, and consistent comfort between rooms.
Location: why above a door?
Placing the interior head above a passage is a profitable strategy in Montreal plexes/condos:
-
Air corridor effect : the flow naturally crosses to the adjacent room, which balances the temperature .
-
Optimized height : a clearance of approximately 7–10 cm below the ceiling allows the supply flap to direct the air under the drop.
-
Safety and maintenance : clearance maintained around the hood for filter access and regular HVAC maintenance .
Salient installation details
-
Support : laser-leveled wall plate, anchors adapted to the load-bearing partition to limit vibrations.
-
Through hole (≈ 65 mm) made sloping outwards for condensate drainage.
-
Discreet routing : refrigeration connections and communication wiring covered in white to match the moldings and integrate the whole into the decor.
-
Condensate management : gravity drainage when the configuration allows; otherwise, dedicated silent mini-pump — choice validated during the technical visit.
-
Vacuuming and charging : vacuum < 500 microns, leak test and replenishment as needed depending on the actual length of the lines.
-
Dedicated power supply from the electrical panel, circuit breaker compliant with the rating of the outdoor compressor.
Expected performance and everyday comfort
-
Gentle cooling in summer without harsh drafts thanks to the adjustable shutter.
-
Regulated heating in mid-season and winter, with capacity maintenance at low ambient temperature.
-
Silence conducive to teleworking and sleeping, even with the door open.
-
Air quality : accessible washable filters; possibility of cleaning schedule included in our HVAC maintenance plans.
AirGreen Best Practices (and Pitfalls to Avoid)
-
Always keep 5–10 cm of clearance in mind and check the opening angle of the shutter so that it does not hit the doorframe .
-
Never blow directly onto a bed/desk: favor the axis of the corridor for a homogeneous air mixture.
-
Take care with the slope of the drain (≥ 1%) and the insulation of the lines to avoid condensation and stains on the moldings.
-
Calibrate BTU output to actual room geometry and orientation, not just square footage.
Grants and eligibility (to be checked on a case-by-case basis)
High-efficiency wall-mounted heat pumps operating on R-32 and performing well in cold weather are generally eligible for programs in effect in Greater Montreal ( Montreal, Laval, Longueuil, North Shore, South Shore ), subject to an energy audit and technical criteria. We assist our clients in preparing supporting documents .
AirGreen process: fast, clean, controlled
-
Technical visit : taking measurements, choosing the layout, electrical validation.
-
Installation : surface protection, drilling, head installation, vacuum, connection and testing.
-
Commissioning : configuration of modes, explanations of use and maintenance advice.
-
Follow-up : assistance with grant applications and annual maintenance reminder.
Recommended maintenance
-
Filter cleaning : monthly during periods of intensive use.
-
Annual inspection : checking pressures, tightness , connections and drain.
-
Optimization : updating of instructions (day/night differences) to maximize SCOP/SEER.
Why choose AirGreen for Rosemont–La Petite-Patrie?
-
In-depth knowledge of Montreal buildings (moldings, ceiling drops, party walls).
-
Certified internal teams, diagnostic tools and strict installation standards .
-
Active grant assistance and accessible after-sales service .
In short : a careful HVAC installation , a GREE R-32 heat pump well positioned above a passageway to cover two rooms, and four-season comfort adapted to the apartments of Rosemont–La Petite-Patrie.