Installation of a Fujitsu wall-mounted heat pump in Chomedey (Laval)
AirGreen installs a Fujitsu wall-mounted heat pump in Chomedey (Laval): concrete slab, short path, gravity-fed condensate, and optimized clearances under the deck. Careful HVAC installation , maintenance, and grant support for the entire Greater Montreal area.
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.
Four-season comfort, protected and discreet under the terrace
Background and objectives
At AirGreen , we are working on a renovated basement of a house in Chomedey, Laval , where the owners want stable comfort in both summer and winter without compromising the aesthetics of the garden. Our recommendation: a Fujitsu monosplit wall-mounted heat pump , sized for the actual needs of the living area (living room + office on the garden level), with particular attention paid to the clearances under the terrace structure.
The choice of equipment
Fujitsu stands out for its reliability in extreme cold and its quiet operation. The targeted capacity range (≈ 12,000 BTU/h ) covers peak room loads while ensuring fine modulation in mid-season. The wall unit offers:
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High seasonal efficiencies (heating/SEER) with inverter compressor;
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Efficient heating at low temperatures, ideal for Greater Montreal ;
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Exterior noise level contained for the neighborhood.
Exterior layout details
We position the condenser on a stable concrete slab , on a bed of draining stones. Four anti-vibration pads limit transmission to the neighboring wooden structure. The key points of the HVAC installation :
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Short refrigerant path (≈ 3–4 m): the connections exit behind the indoor unit and descend directly, limiting pressure losses and optimizing efficiency.
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Gravity-based condensate management : discreet discharge towards the stone bed, preventing frost in winter.
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Air clearances respected despite the terrace: free extraction on the grille side, sufficient clearance at the rear and above for defrosting .
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Dedicated wiring and circuit breaker compliant with current code; service switch within reach (out of scope).
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Natural protection against snow and direct sunlight thanks to the terrace: less winter accumulation, better longevity of finishes.
Interior intervention
The wall head is placed high up, centered on the traffic axis. The criteria used:
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Free blowing without conflict with curtains/doors;
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Even distribution to the adjacent office;
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Unique clean and capped drilling ; watertight joints and high-density insulation to prevent condensation in the wall.
Site challenges… and our solutions
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Under-terrace space : risk of hot/cold air recirculation. We have validated the clearances and flow direction to avoid any air loops.
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Wooden structure vibrations : elastomer pads + precise slab wedging eliminate resonances.
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Snow management : positioning under the terrace avoids snow banks; sufficient ground clearance is provided for defrosting frost.
Measurable result for the client
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Immediate and stable comfort : rapid heating, uniform cooling in summer.
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Silence : preserved neighborhood; low sound pressure near windows.
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Efficiency : continuous modulation reducing on/off cycles; energy bill optimized compared to equivalent electric baseboards.
Good maintenance practices
To maintain performance and warranty:
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Gently rinse the external battery in the spring (without high pressure).
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Clean/vacuum the inner head filters monthly during use.
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Clear leaves and debris around the condenser.
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Schedule annual HVAC maintenance by our technicians (refrigerant check, electrical connections, condensates, defrosting).
Grants and Compliance
Fujitsu high-efficiency wall-mounted heat pumps generally meet the financial assistance criteria when they display certified efficiencies and low-temperature performance. We support our customers with pre-eligibility verification and file preparation, whether you are in Montreal , Laval , Longueuil , on the North Shore or the South Shore .
Site planning tips for houses with terraces
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Aim for sufficient clearance at the blowing/suction faces;
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Prefer a stable slab rather than bare ground to limit frost movements;
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Anticipate the gravitational flow of condensates and move it away from pedestrian paths;
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Avoid closed corners: free airflow guarantees performance and lifespan.
Why AirGreen
We combine precise sizing , careful execution, and compliance with local standards. Our teams cover the entire Greater Montreal area and offer fast installation slots, clear maintenance contracts , and comprehensive grant support. Your project becomes a lasting investment in comfort and savings.
Keywords mastered: heat pump , wall-mounted heat pump , HVAC installation , HVAC maintenance , Montreal , Laval , Longueuil , North Shore , South Shore .
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).