Quiet and precise comfort in a typical Montreal corner room
At AirGreen , we work weekly in apartments and plexes in the Plateau-Mont-Royal region , where corner rooms, windows close to exterior staircases and varying ceiling heights require a perfectly designed HVAC installation . Here, our client wanted to stabilize the temperature of a bedroom-office overlooking the alley, which was sensitive to heat fluctuations in both summer and winter. We recommended and installed a Fujitsu wall-mounted heat pump from the Altair range (R-32) , a benchmark for its fine blowing, its inverter precision and its almost inaudible operation .
The context: a compact room, an available exterior wall, and usage constraints
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Room : 10–12 m², standard ceiling, corner with window and full-width curtain rod.
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Furniture : Open shelving and storage bins under the installation area; need to maintain daily access.
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Wall : exterior, on the side facade; ideal for reducing the length of refrigeration connections and favoring gravity evacuation of condensates .
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Objective : stable comfort for sleeping and teleworking, without direct drafts and without noise.
This configuration led us to choose a high installation , offset from the window frame, in order to optimize air recirculation and limit the visual impact . The interior unit blows above the work surface without directly reaching the occupant: the result is a feeling of uniform freshness in summer and regular heating in winter.
Why the Fujitsu Altair (R-32) makes a difference in Greater Montreal
Performance and energy efficiency
The Altair range uses a very slim inverter compressor : the machine modulates exactly the power required, which reduces on/off cycles , improves comfort and lowers consumption . The R-32 refrigerant allows better heat transfer than a historical R-410A, while lowering the environmental footprint.
Key assets:
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Efficient heating in very cold weather (XLTH range available depending on the configuration chosen).
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High SEER/SCOP for tangible savings on energy bills.
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Remarkably quiet interior head: ideal for bedrooms and offices.
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Advanced filtration : improves ambient air quality, beneficial during pollen periods.
Capacities and sizing choices
The series offers typical capacities of 9,000 to 18,000 BTU for simple to medium-sized rooms. In Plateau-Mont-Royal , the diversity of envelopes (party walls, old facades, wood or PVC windows) requires sizing by thermal load : we analyze exposure, air infiltration, insulation and actual use. Result: an adjusted capacity that avoids both undersizing (machine at full capacity, wear, discomfort) and oversizing (short cycles, poorly managed humidity).
Installation details: neat, discreet, durable
Short and clean refrigeration route
The exterior wall just behind the head allowed for a single piercing and minimal routing of the insulated copper connections. This reduces:
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pressure losses ,
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the potential risk of refrigerant noise,
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and facilitates possible future HVAC maintenance operations .
The capping is coordinated with the clear finish of the wall; the outlets are clean and straight , without unnecessary bends. Outside, the connections follow a protected vertical path , with termination under a box to preserve the aesthetics of the facade.
Condensate management: priority to gravity
The available height allowed for gravity drainage - without a condensate pump - ensuring silence and reliability . In dense urban areas (Montreal intramural), this is the solution we favor whenever the architecture allows it.
Condenser support and anti-vibration
The condenser (not visible in the photo) is fixed on anti-corrosion treated wall brackets , with anti-vibration pads . This:
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keeps the machine away from snow and debris,
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improves air circulation around the battery,
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limits vibration transmission to adjoining walls — a sensitive point in the Plateau plexes.
Power supply and protections
We coordinate with the electrician for a dedicated power supply and a circuit breaker sized to the load. The communication cabling is laid according to the rules of the art , with marking and sheathing at the interface points. This rigor ensures durability and simplifies after-sales service .
Perceived comfort: what the customer feels, summer and winter
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Cooling : The air direction paddle is set to sweep the room without direct flow onto the workstation. Dry mode provides better humidity control during Montreal's heat waves.
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In heating : the air ramp directed slightly downwards promotes rapid mixing , reducing the stratifications often felt near windows.
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Noise : the machine operates at minimum noise at night; the gentle restart of the inverter prevents jolts.
AirGreen Best Practices for Plateau Plexes
Smart positioning
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Avoid nearby obstacles (rods, wall returns, shelves) which disrupt the suction of the interior head.
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Provide clearance under the unit for maintenance: dust removal, filter cleaning, condensate tray inspection.
Renovations and finishing touches
In older buildings, we respect the existing framework and look for the shortest route : less drilling, less impact. The finishes (capping, collars, seals) are treated to resist freezing/thawing and remain aesthetic .
Recommended HVAC maintenance
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Cleaning filters : every 4 to 8 weeks depending on use.
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Annual inspection : measurement of parameters, checking of fasteners, cleaning of battery and fan, checking of drainage.
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External clearance of the condenser in winter (snow, ice) to preserve the performance of the heat pump in extreme cold .
Grants and Eligibility: What You Need to Know
New generation wall-mounted heat pumps operating with R-32 , and particularly the extreme cold ranges (XLTH), are frequently eligible for assistance programs when they meet performance levels specified by provincial or federal agencies. We guide each client on:
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the applicable eligibility criteria ,
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the technical documents to be provided (AHRI sheet, certification numbers),
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the administrative sequence to maximize the amounts available in Montreal, Laval, Longueuil, North Shore, South Shore .
Result: a peaceful room, controlled operating costs
The owner now benefits from:
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a homogeneous summer/winter climate ,
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a minimum noise level compatible with sleep and concentration,
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optimized electricity consumption thanks to the inverter and good sizing,
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aesthetic integration : the head aligns neatly under the ceiling, freeing up space above the shelves and near the curtains.
Why choose AirGreen for your project in Plateau, Laval or on the Rive
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Local expertise : we know the plex structures and facade constraints of Greater Montreal .
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Method : thermal study, precise positioning , rational refrigeration route, clean finishes.
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Support : from assistance in choosing capacity (BTU) to grant management , then to HVAC maintenance .
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Recent brands : we install R-32 / R-454B models (Fujitsu, Sharp, Midea, Gree, etc.) to guarantee performance and compliance with current standards.
Practical tips for a similar bedroom or office
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Avoid obstacles under the air intake: curtains that are too close, deep shelves or clothes dryers.
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Set low speeds at night; use air direction to avoid blowing onto the bed.
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Clean filters regularly to maintain air quality and performance.
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Monitor the drain : if drops appear, contact our team quickly to check the drain.
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Schedule annual maintenance at the start of the air conditioning season: the machine will be ready for the heat of July and August.
In summary
This Fujitsu Altair wall-mounted heat pump installation in Plateau-Mont-Royal demonstrates the importance of precise sizing , a short cooling path , a well-designed gravity drain , and discreet placement in a small corner room. The result is consistent comfort , a quiet atmosphere , and tangible energy savings —exactly what families and professionals who live and work in the heart of Montreal are looking for.
For a similar project in Montreal, Laval, Longueuil, on the North Shore or the South Shore , our team will support you from the evaluation to after-sales service, with the same AirGreen quality requirement.