Installation of a Fujitsu wall-mounted heat pump on a rear balcony in Plateau-Mont-Royal (Montreal)
AirGreen installed a Fujitsu wall-mounted heat pump in the Plateau-Mont-Royal neighbourhood , mounted on a brick-bonded wall bracket with vibration-damping insulation and carefully concealed pipework. An ideal solution for year-round comfort in Montreal's multi-unit dwellings.
- City
- Region
- Equipment
- Brand
- Challenges
- Published
The job on one screen
The article, chapter by chapter
In the Plateau-Mont-Royal neighbourhood, brick buildings with stacked balconies and compact outdoor spaces often require more technically complex installation choices than they initially appear. On this project, our AirGreen team installed a Fujitsu wall-mounted heat pump ( AIRSTAGE series, configured with a Fujitsu Altair 500 (KPAS – R-32) ) while optimizing performance, visual discretion, and durability for Quebec conditions.
A typically Montreal setting: brick, balcony, and limited space
The photo illustrates a very common environment on the Plateau: a brick facade, closely spaced windows, a narrow passage to a rear balcony, and above all, a major constraint: the balcony ceiling (a wooden structure) is very close to the installation area . In this type of configuration, the success of the project depends on details that seem insignificant, but which make all the difference.
-
Sufficient air clearance around the outdoor unit
-
Noise and vibration management (for the comfort of occupants… and neighbors)
-
Protection against the elements (rain, ice, freeze/thaw cycles)
-
Clean integration of refrigeration connections and electrical cable
-
Smart positioning to facilitate future maintenance
At AirGreen, we don't "place" a unit: we plan its behavior over several years.
Type of system installed: wall-mounted heat pump (mini-split)
The visible system consists of a compact outdoor unit supplying an indoor wall-mounted unit (not visible in the photo). This is the most suitable solution for many homes in the Plateau-Mont-Royal borough, particularly when:
-
There is no existing network of conduits.
-
We want precise control by zone.
-
We are looking for good efficiency in heating and air conditioning.
-
We want a relatively quick and clean installation.
A wall-mounted heat pump is also an excellent choice for improving the comfort of a floor or a large open area, without major work.
Make and model: Fujitsu (AIRSTAGE) – consistent hypothesis Altair 500 (KPAS, R-32)
The brand name provided is Fujitsu , and it is consistent with the visible unit. For this type of size and generation, a logical model to mention for a residential project in Montreal is a Fujitsu Altair 500 (KPAS – R-32 refrigerant) .
What makes this category of Fujitsu products interesting for Greater Montreal:
-
Stability of performance under varying temperatures
-
Constant comfort (inverter modulation, fewer sudden changes)
-
A good balance between efficiency, silence and longevity
-
A system recognized for urban residences where every decibel counts
(As always, the exact BTU capacities and final parameters depend on the load calculation and interior layout.)
Prominent installation details that can be observed (and why it matters)
1) Sturdy wall bracket, perfectly suited to brick walls
The outdoor unit is mounted on a metal wall bracket anchored to the masonry. This is an excellent choice in an urban environment.
-
frees up floor space (practical on a balcony),
-
limits bulk,
-
reduces the risks associated with snow accumulated on the ground in winter,
-
facilitates cleaning and inspection.
2) Vibration reduction: cushions/insulation under the unit
Anti-vibration pads (blue supports) are visible between the unit and the support. In a Montreal apartment building, this is a crucial point: vibrations are quickly transmitted to the structure, especially when the unit is operating in heating mode during periods of extreme cold.
Result: less noise , more comfort, less stress on the structure.
3) Passing the connections and finishing cleanly
The refrigerant lines and electrical connection are routed neatly, with a clean vertical drop. In brick-built installations, the objective is twofold:
-
Visual cleanliness (important in a shared backyard),
-
protection against long-term wear and friction.
4) Clearance under the balcony: a parameter to be treated seriously
Installing under a balcony is possible, but it's never a "random" process. You must ensure that:
-
The expelled air is not recirculated.
-
unity does not "suffocate",
-
Frost does not accumulate in large blocks in a confined space.
-
Maintenance remains accessible.
On this project, the unit is positioned to maintain a logical airflow , while protecting the compressor from direct rain and ice falls.
Why this installation is particularly relevant to the Plateau-Mont-Royal
In this sector, several clients ask us for a heat pump for two very specific reasons:
-
Reliable air conditioning in the summer , especially in brick buildings that retain heat
-
Efficient supplemental heating during the shoulder seasons (and sometimes longer), to reduce reliance on other energy sources
A Fujitsu wall-mounted heat pump responds very well to this reality: it allows stable comfort, room by room, without major work, and with an interesting efficiency.
Key steps that our team systematically applies (even when the installation seems simple)
At AirGreen, we follow a strict logic, especially in urban environments:
-
Validation of the location for future access (cleaning, maintenance, service)
-
Measuring clearances to avoid air recirculation problems
-
Noise management: choice of support + pads + positioning
-
Routing of pipes for a clean and durable finish
-
Electrical check (circuit breaker, connection, safety)
-
Complete commissioning: tests, pressures, functional validation
It is these “invisible details” that make a heat pump remain pleasant… year after year.
Practical advice for homeowners (Plateau, Rosemont, Southwest and similar neighborhoods)
If you are considering a balcony or backyard installation in a brick building, here is what deserves your attention:
-
Avoid the ground if snow and ice accumulate in that area.
-
Demand an anti-vibration solution: it's immediate comfort.
-
Make sure the location does not block airflow (especially under a balcony).
-
Think of the neighbors: good orientation and good support make a real difference.
-
Request a finish that protects the pipes: durability depends on it.
Conclusion: a discreet, robust project, designed for Montreal
This Fujitsu wall-mounted heat pump installation in Plateau-Mont-Royal perfectly illustrates our approach: integrating high-performance equipment into a real urban environment, with its constraints (brick, balcony, clearances, neighborhood), while delivering a clean, reliable and comfortable solution.
If you are in Montreal (Plateau-Mont-Royal, Rosemont–La Petite-Patrie, Ville-Marie, Villeray), Laval or on the South Shore/North Shore, our AirGreen team can recommend the right system, in the right place, with an installation designed to last.
The job tools
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.
How the job unfolds
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 we check on a job like this one
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.
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.
Good habits, once the unit is in place
Six simple habits that keep the unit going. Your list stays on this device.
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.
The right pages, at the right time
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.
More jobs to see, near you
By town, by equipment or by region: browse more than 4,700 published projects.
Each dot: a town where AirGreen has published projects. The glowing dot: this job.
An on-site estimate, the right capacity, the right equipment.
The on-site estimate is free and the quote follows within 24 hours.
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).