Fujitsu wall-mounted heat pump installation in Rosemont–La Petite-Patrie: discreet comfort and four-season performance
AirGreen installed a Fujitsu Airstage R32 wall-mounted heat pump in a Rosemont–La Petite-Patrie apartment. Its discreet interior integration, efficient air distribution, and stable comfort are perfectly suited to Montreal's urban lifestyle.

Take a tour of the installation
Each number is a point we check on site. Switch between summer and winter to watch air and heat move.
In summer, the outdoor unit rejects the house's heat outside.
Generic illustration of this type of installation, not a survey of this job site. Tap a number.
Mounted level on a wall plate, high enough for the air to reach the whole room, with enough space around it to slide the filters out easily.
The refrigerant lines, the communication cable and the drain go through the wall in a single opening, sealed against water, cold air and insects.
Two insulated copper pipes connect the two units. Outside, a line cover can protect them from sun, knocks and weather.
A shut-off switch near the outdoor unit isolates it safely for service. It must stay accessible at all times.
The compressor and the fan. In heating mode it captures heat from the outdoor air, even in winter, and moves it inside.
On the ground or on the wall, it keeps the unit above accumulated snow. The unit stays clear and defrost water can drain away.
The fan needs to blow freely. Storage, a fence or a wall too close, and efficiency drops while noise goes up.
In a residential apartment in Rosemont–La Petite-Patrie , Montreal, we recently completed the installation of a Fujitsu wall-mounted heat pump , a choice perfectly suited to urban realities: optimized spaces, precise comfort needs and the search for a quiet, reliable and efficient system all year round.
This type of neighborhood, composed mainly of duplexes and small residential buildings, demands a careful approach from both a technical and aesthetic standpoint. At AirGreen , our goal remains the same: to seamlessly integrate HVAC technology into the living space, without compromising on comfort or sustainability.
The system installed: Fujitsu Airstage wall-mounted heat pump (R-32)
Based on the elements visible in the interior photo, this is clearly a Fujitsu Airstage wall-mounted heat pump (mini-split/wall unit) , operating on R-32 refrigerant . It features a compact wall unit with a clean design, installed high up — an ideal configuration for uniform air distribution in a Montreal apartment.
Model consistent with the installation
Although the nameplate is not legible in the image, the shape of the indoor unit, the Airstage designation, and the urban residential setting strongly suggest a Fujitsu Altair 300 (KNAS R-32) or Altair 500 (KPAS R-32) . These models are frequently installed in apartments and condos in Greater Montreal due to their balance of performance, quiet operation, and energy efficiency.
Why a Fujitsu wall-mounted heat pump is ideal in Rosemont
In an area like Rosemont–La Petite-Patrie, several constraints come into play:
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areas sometimes small,
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standard ceilings,
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party walls,
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requires very quiet operation,
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Heating and air conditioning are often centralized in a limited way or non-existently.
The Fujitsu wall-mounted heat pump perfectly addresses these realities thanks to:
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a gentle and directional airflow , without unpleasant drafts,
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excellent modulation , avoiding sudden temperature variations,
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high efficiency in air conditioning during the summer,
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reliable heating capacity for much of the Montreal winter.
Interior installation details: precision and integration
1) Positioning at a height, near an opening
The unit is installed above an interior passageway, a common and effective solution in urban housing. This position allows for:
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improved air circulation in several areas,
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discreet integration into the existing architecture,
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minimal occupation of usable wall space.
We always validate the clearances recommended by Fujitsu to ensure optimal operation and easy access for maintenance.
2) Clean and discreet finish
The routing of the pipes (refrigerant, drain, supply) is perfectly integrated into the wall, without visible moldings or intrusive elements. This is essential in homes where interior aesthetics are important.
At AirGreen, we pay particular attention to:
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wall head alignment,
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the cleanliness of the joints,
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the stability of the fixing,
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overall visual discretion.
3) Integrated sensors and controls
The indicator lights and integrated sensors under the unit are typical of recent Fujitsu models. These elements contribute to:
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more precise temperature control ,
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improved responsiveness depending on room occupancy,
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consistent comfort, without frequent adjustments.
Everyday comfort: what the customer quickly notices
In projects similar to Rosemont, residents typically observe:
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a more stable temperature throughout the dwelling,
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Quiet air conditioning, even during heat waves.
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an improvement in nighttime comfort
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a reduction in the use of electric baseboard heaters.
In the mid-season, the wall-mounted heat pump often becomes the primary source of heating, resulting in better energy efficiency and more consistent comfort.
An AirGreen installation: beyond the machine
Even with a well-known brand like Fujitsu , the quality of the installation remains crucial. For this type of residential project, our approach includes:
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analysis of the actual thermal load of the dwelling,
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the precise choice of the interior location,
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the watertight and durable wall drilling,
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the rigorous vacuuming of the pipes,
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complete commissioning with functional tests,
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Usage tips adapted to urban lifestyles.
It is this rigor that ensures that the heat pump delivers its true performance, year after year.
Maintenance and longevity
In an urban environment like Montreal, minimal but regular maintenance is recommended:
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Periodic cleaning of the filters
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drainage check
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Occasional professional maintenance to preserve performance and reliability.
A well-maintained Fujitsu wall-mounted heat pump can provide many years of worry-free comfort.
AirGreen: Your HVAC Expert in Montreal
Whether in Rosemont–La Petite-Patrie , elsewhere in Montreal (Plateau-Mont-Royal, Villeray, Ahuntsic, Verdun, etc.), in Laval or on the North Shore / South Shore , we install Fujitsu systems adapted to local realities, always with the same requirement for quality.
The big day, step by step
The main steps of this kind of job at AirGreen. Every house has its quirks: the estimate brings them out.
We look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
Model, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
Floors and furniture protected, wall plate position marked level, wall opening located.
A single opening, with the slope the drain needs to flow outside.
Set on a stand raised above the snow, with the clearances the manufacturer requires.
Connected, insulated and protected. The opening is then sealed against water, cold air and insects.
A dedicated circuit and an accessible disconnect near the outdoor unit.
Leak test, vacuum, then start-up and a check of heating and cooling.
Remote, modes, filters: we show you the essentials before we leave.
- The on-site estimateWe look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
- The quoteModel, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
- Getting readyFloors and furniture protected, wall plate position marked level, wall opening located.
- The wall openingA single opening, with the slope the drain needs to flow outside.
- The outdoor unitSet on a stand raised above the snow, with the clearances the manufacturer requires.
- Lines, cable and drainConnected, insulated and protected. The opening is then sealed against water, cold air and insects.
- The electrical workA dedicated circuit and an accessible disconnect near the outdoor unit.
- Tests and start-upLeak test, vacuum, then start-up and a check of heating and cooling.
- The walkthroughRemote, modes, filters: we show you the essentials before we leave.
What would it look like at your place?
Two quick checks with real numbers: what heat costs, and what your current heaters add up to in BTU/h.
Conversion: 1 W = 3.412 BTU/h. An indication, not a load calculation: baseboards and furnaces are often stronger than the real need, and they can stay as backup. AirGreen confirms the capacity on site.
Four mistakes we do not make
Flip each card to see what we do instead.
Your own project, step by step
What to do, season by season
Three habits per season for this unit. They take a few minutes and prevent many calls.
- Clean the indoor unit's filters.
- Clear leaves and debris left on the outdoor unit by winter.
- Test cooling before the first hot days.
- Clean the filters more often when the unit runs a lot.
- Keep plants away from the outdoor unit.
- Check that no water drips from the indoor unit.
- Rake the leaves around the outdoor unit.
- Test heating before the first cold days.
- Book periodic maintenance before winter.
- Keep snow away from the stand and the front of the unit.
- Let the unit defrost: it is normal.
- Never hit the ice on the fins; call us if the unit stays iced up.
Is your home ready?
Check what applies at your place. A "no" is not a refusal: it is what we sort out during the estimate.
Four statements: true or false?
It all comes down to details you have just seen.
1. In heating mode, the outdoor unit can produce water.
During defrost cycles. That water must drain away without forming ice.
2. You pick the capacity with a simple square-footage rule.
Windows, insulation, orientation and how the room is used all count. Capacity is chosen on site.
3. A multi-zone connects several indoor heads to a single condenser.
One head per room, all on the same condenser. Each room keeps its own temperature.
4. The disconnect can sit behind the patio furniture.
It must stay accessible: it is what shuts the unit off for service.
0 / 4 right answers
What people ask us about this kind of work
Does a wall-mounted heat pump heat in winter?
Wall-mounted or multi-zone: how do I choose?
Where does the outdoor unit go?
Are there grants?
Do I need a permit?
How cold can it heat?
How much can I save?
How is the LogisVert assistance calculated?
Is it noisy?
The outdoor unit is covered in ice: is that normal?
Does AirGreen hold the required licences?
Is the estimate free?
No question matches. Write to us: we answer.
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Text and photo: a real AirGreen Climatisation & Chauffage job. The diagrams are generic illustrations of the type of installation, not a survey of this job site. Sources of the added figures: airgreen.ca product pages (NEEP / AHRI performance), Hydro-Québec (Heat pumps page, LogisVert, read on 13 October 2026), Régie de l’énergie (rate D as of 1 April 2026).
