Four-season comfort, discreet and efficient, perfectly suited to Rosemont plexes
Client context and objectives
At AirGreen , we are currently working on a plex-type apartment in Rosemont–La Petite-Patrie . Our client wants to stabilize the temperature in a southwest-facing room that overheats in the summer and cools down quickly in the winter. The priorities are clear: immediate comfort , low energy consumption , quiet operation , and careful integration into an already furnished space. We are proposing the installation of a Fujitsu single-zone wall-mounted heat pump , a format that is particularly relevant for urban housing in Greater Montreal.
Why a wall-mounted heat pump in this type of apartment?
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Energy efficiency : A heat pump transfers heat instead of producing it, reducing bills compared to electric baseboard heaters and portable air conditioners.
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Versatility : a single device provides summer air conditioning and winter supplementary heating down to very low temperatures depending on the range chosen.
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Compact installation : no ductwork; the wall head fits high above the openings, freeing up useful space.
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Quiet : Fujitsu indoor units are renowned for their very low noise levels, ideal for an office, bedroom or living room.
Retained configuration and location
We place the head above the window , on the edge of the ceiling, in order to:
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Optimize air circulation by sweeping across the glass facade and break the cold wall effect in winter.
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Reduce the length of refrigerant connections by passing them directly to the outside.
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Facilitate maintenance and access to filters.
The condensate drain operates by gravity with a continuous slope towards the outside, avoiding an internal pump (source of noise and additional maintenance). The installation height is calibrated to maintain sufficient clearance above the device and ensure even air flow throughout the room.
Technical installation details (summary of work)
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Single 65 mm hole through the exterior wall, with sleeve and interior/exterior sealing with elastomeric sealant.
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Continuously insulated copper refrigerant connections (closed cell), short length typical of a wall-to-wall installation in plex (approximately 2 to 3 m).
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Communication and power cabling routed in the same technical cover, stainless steel fixings and anchors adapted to the support.
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Discreet, UV-resistant exterior capping for a clean, durable finish.
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Micron vacuum , leak test and controlled load according to Fujitsu specifications.
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Drain management with frost and splash protected outlet; slope checked at level.
Everyday performance and comfort
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Rapid cooling of solar energy in the afternoon thanks to turbo mode and motorized sweeping .
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Supplementary heating during the off-season, reducing the need for baseboards.
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Noticeable silence : the Fujitsu head operates at low speed during the night, ideal for an office/bedroom .
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Air quality : washable filters accessible without tools; integrated maintenance reminder.
Aesthetic integration and respect for the building
In the Rosemont plexes, the brick facade frame and metal balconies require careful exterior installation. We favor:
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The shortest possible passage at the back of the head to limit the visual impact .
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Anti-corrosion fixings and matching paint/capping to blend in with the masonry.
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An exterior height designed for maintenance accessibility while keeping away from passage areas.
Eligibility for programs and energy savings
Fujitsu 's recent wall-mounted heat pumps (R-32/XLTH ranges depending on configuration) achieve high efficiencies and are generally part of current Quebec assistance programs . In Greater Montreal ( Montreal, Laval, Longueuil, North Shore, South Shore ), we support our customers in verifying eligibility , documentation and submitting the necessary evidence .
AirGreen deadlines and methodology
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Taking needs and sizing in BTU according to the surface, orientation and actual insulation.
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Validation of the indoor/outdoor location for the wall-mounted heat pump , including the drain routing.
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RBQ certified HVAC installation by a dedicated team , compliance with electrical and refrigeration standards.
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Instrumented commissioning : deep vacuum, pressure/temperature verification, operating instructions given to the customer.
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Post-installation follow-up : HVAC maintenance reminders and annual visit offer (cleaning, connection inspection, performance test).
What you need to know about urban housing like this
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Placing the head above a window is often the best option for dealing with solar gain and keeping the room uniform.
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A gravity drain is more reliable and quieter than a pump; it must be planned for from the design stage.
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Minimum connection length = optimized efficiency and lower losses ; this installation ensures it.
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Regular maintenance (filters every 1 to 2 months during intensive periods; annual professional cleaning) maintains performance and air quality .
Instructions for use and maintenance
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Target temperature : keeping a stable setpoint avoids consumption surges.
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Automatic swing in cold mode to circulate the air near the window; horizontal swing in heating mode to avoid direct discomfort.
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Filters : rinse with lukewarm water, dry completely before replacing.
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Clearance : leave at least 20 cm above and around for good air intake.
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Winterization : Keep the exterior drain clear ; ensure that no ice forms there.
Result at our client's in Rosemont
The room feels cooler from the first few minutes in air conditioning mode. At the end of the day, the temperature remains constant without fluctuations. In the fall, the heating mode maintains stable comfort on cool nights without putting excessive strain on the baseboards. The integration above the window frees up the wall for furniture and maintains a clean aesthetic .
Why entrust your project to AirGreen?
We cover Montreal , Laval , Longueuil , the North Shore and the South Shore with teams specialized in wall-mounted heat pumps . Our approach combines precise sizing , rigorous installation , careful finishing and administrative support to maximize your savings. You benefit from responsive after-sales service and clear advice to make your investment last.
Next step
A similar project in a plex, condo, or townhouse? We'll schedule a quick technical visit , confirm the ideal BTU capacity , and provide a detailed quote including warranty options and installation timelines.
Quick Fair (Key Points)
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Type : single-zone wall-mounted heat pump .
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Brand : Fujitsu .
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Installation : head above a window , direct crossing , gravity drain , UV exterior cover.
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Benefits : 4-season comfort , silence , savings , easy maintenance .
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Service area : Montreal , Laval , Longueuil , North Shore , South Shore .
About AirGreen
A Montreal-based HVAC company, AirGreen designs and installs energy-efficient solutions tailored to local architecture: plexes, condos, townhouses, and co-ownerships. Our mission: to deliver lasting comfort , impeccable work , and transparent support from the first contact to the annual follow-up.