Installation of a Napoleon wall-mounted air conditioner in Sainte-Julie
Napoleon wall-mounted air conditioner installation in Sainte-Julie. AirGreen provides expert HVAC service for Montreal, Laval, Longueuil, North Shore, and South Shore.
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The job on one screen
The article, chapter by chapter
A residential project where performance and comfort come together
At AirGreen, we recently completed the installation of a Napoleon wall air conditioner in a single-family home in Sainte-Julie, on the South Shore of Montreal. This project perfectly illustrates the growing demand for reliable, compact heating and cooling solutions adapted to Quebec’s climate realities. Choosing a Napoleon system is particularly interesting because this Canadian brand offers robust equipment designed to withstand our harsh winters while providing optimal comfort during the summer.
A system tailored to a family’s needs
The house in question is a recent property with high-performance insulation, but the old air conditioner no longer met expectations. Installing a wall air conditioner allows the family to enjoy a 2-in-1 system: efficient heating in winter and quiet cooling in summer. The chosen capacity — around 12,000 BTU — is perfectly suited for the main living spaces, especially the open-concept living and dining rooms.
Key installation steps
Preparation and location of the outdoor condenser
The Napoleon condenser was installed on supports placed on treated wooden beams resting on a bed of decorative stones. This solution protects the unit from moisture and snow while ensuring good air circulation. The electrical panel was nearby, which minimized wiring length and reduced intervention time.
Drilling and refrigerant connection
A discreet hole in the rear wall of the house allowed the passage of refrigerant pipes and electrical wiring. The lines were carefully insulated and protected by a white capping, perfectly integrated with the exterior cladding. The installation was designed to prevent any air infiltration and maximize the system’s energy efficiency.
Drainage management
Condensate drainage was done by gravity, avoiding the use of an additional pump. This choice simplifies maintenance and reduces the risk of failure. The drainage pipe was positioned with an adequate slope for smooth and discreet flow.
Advantages of a Napoleon air conditioner
A Canadian brand designed for Quebec’s climate
The Napoleon air conditioners are designed to withstand low temperatures, with some models maintaining stable performance down to -25 °C. They include automatic defrost technologies, essential to ensure consistent performance even in the heart of winter.
Energy efficiency and savings
Thanks to its seasonal efficiency (high SEER and optimized HSPF), this system significantly reduces the annual energy bill. Homeowners thus benefit from a return on investment not only through increased comfort but also through savings on traditional electric heating.
Eligibility for subsidies
This type of installation is eligible for subsidy programs offered by Hydro-Québec and the Canadian federal program “Greener Homes,” which encourage the adoption of energy-efficient solutions. At AirGreen, we always assist our clients in preparing their applications to maximize available financial aid.
Challenges encountered and solutions provided
One of the main challenges of this project was the limited space in the backyard. To avoid cluttering the passage area, the condenser was installed near the fence, while respecting the minimum clearances for ventilation. Additionally, to absorb vibrations and reduce transmitted noise, we used specialized anti-vibration mounts, thus improving acoustic comfort both inside and outside.
Final result: comfort, efficiency, and peace of mind
Thanks to this installation, the homeowners now enjoy a more comfortable home year-round. The Napoleon wall unit provides stable heating in winter and pleasant coolness in summer, all with quiet and discreet operation. Recommended annual maintenance will ensure the system’s longevity and performance preservation.
Why choose AirGreen for your HVAC installation?
At AirGreen, we focus on:
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Personalized advice to choose the right device according to your needs.
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Careful installation respecting the strictest standards.
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Comprehensive support for subsidies and maintenance.
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Recognized local expertise throughout Greater Montreal, including Sainte-Julie, Brossard, Longueuil, Laval, the North Shore, and the South Shore.
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.
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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).