A wall-mounted heat pump designed for a loft renovation, carefully installed by our AirGreen teams
Project background
In a Griffintown loft with open volumes and current finishes (exposed metal beam, concrete platform, freshly prepared walls), our client wanted four-season comfort without weighing down the aesthetics of the space. We recommended a Fujitsu Altair 500 (R-32) – 12,000 BTU wall-mounted heat pump , known for its low-temperature efficiency and quiet sound, perfectly suited to condos in Greater Montreal .
Why the Fujitsu Altair 500 R-32 here?
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Energy efficiency : inverter compressor, R-32 refrigerant more efficient and with lower GWP than the old R-410A.
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Comfort in Montreal winter : maintaining low temperature capacity (extreme cold range of the series), ideal for our January peaks.
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Silence : indoor unit with very low noise level , essential in an open space.
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Aesthetics : clean white casing that blends into a light gray wall, with no visible cables.
Installation process: clean, fast, optimized for an urban space
Interior layout
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Positioning : wall head installed high at an angle , under the ceiling, to promote airflow along the entire length of the loft while avoiding air returning against the beam.
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Working height : approximately 2.3 m, ideal for shutter clearance and maintenance.
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Finish : clean sealing around the support, horizontal alignment electronically controlled.
Refrigeration path & condensate evacuation
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Short path between the head and the outer casing (approximately 5 to 7 linear meters ), limitation of pressure losses and optimization of seasonal efficiency.
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Gravity evacuation of condensates with a continuous slope and an anti-odor siphon; no pump required, therefore zero additional noise .
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Insulation & capping : refrigeration lines insulated along their entire length, discreet capped passage, color matching the wall.
Outdoor unit and power supply
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Condenser installed outside on anti-vibration supports , clearances respected for air recirculation and maintenance.
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Electrical connection on a dedicated circuit in accordance with the Code, circuit breaker protection adapted to the power of the device, low voltage interconnection cable pulled at the same time as the lines.
Commissioning and quality controls
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Nitrogen leak test , pressure resistance.
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Deep vacuum up to the threshold recommended by the manufacturer.
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Opening the fluid and reading the supply/return temperatures .
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Condensate flow verification and remote control calibration (modes, temperatures, scanning).
Result for the customer
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Even cooling in summer despite the high ceiling.
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Effective supplementary heating in mid-season and support in winter.
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Minimal noise , essential for teleworking and evenings with friends.
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Clean finish : no messy sheathing, no marks on the new paint.
AirGreen Tips for Lofts and Condos in Greater Montreal
Sizing & placement
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BTUs adapted to the surface area and height: a loft of 35–55 m² often lends itself to a 12 kBTU if the envelope is correct.
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Avoid obstacles : Position your head to avoid beams, ceiling returns and columns to prevent air pockets .
Condensates: favor gravity
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If the layout allows, gravity drainage is more reliable and quieter than a pump. We design the slope during planning to prevent backflow.
HVAC maintenance not to be neglected
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Clean filters every 4–8 weeks during use.
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Annual maintenance by our technicians: deep cleaning of the indoor unit, checking of the outdoor coil, electrical connections, pressure and temperature settings.
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Regular maintenance preserves SEER/HSPF and reduces consumption .
Grants & Compliance
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The high-efficiency R-32 wall-mounted series is often eligible for efficiency programs in Quebec when seasonal performance and low-temperature heating criteria are met.
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We advise you on eligibility (Montreal, Laval , Longueuil , North Shore , South Shore ), manufacturer documentation , and we provide the required proof of installation .
Why AirGreen for your wall installation?
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Local expertise in HVAC installation for lofts/condos: short, optimized routes, clean drilling, careful finishing.
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Recent brands (refrigerant R-32 / R-454B ) to combine performance and environmental responsibility .
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Complete service : thermal assessment, clear recommendations, certified installation, HVAC maintenance and grant assistance.
Express FAQ
Is a wall-mounted heat pump enough for a loft?
Often yes, if the sizing and placement are correct; otherwise, a second head or a MultiZone configuration is added.
What about noise?
Fujitsu Altair heads are among the quietest in their class. A rigid mount and a well-chosen external vibration dampener make the system virtually imperceptible.
Interview ?
Annual maintenance extends the lifespan and protects your warranty. We offer maintenance plans tailored to urban usage cycles.
Conclusion
In this Griffintown loft, the Fujitsu Altair 500 R-32 – 12 kBTU provides stable, quiet and eco-efficient comfort . Thanks to a short cooling path, a well-designed gravity evacuation and rigorous commissioning, the system delivers its full potential, summer and winter. At AirGreen, we install and maintain high-performance wall-mounted heat pumps throughout Montreal, Laval, Longueuil, North Shore and South Shore .