Installation of a KoolKing Thermo wall-mounted air conditioner in Saint-Léonard
AirGreen installed a Komfort Thermo wall-mounted air conditioner in a condo in Saint-Léonard. A discreet, efficient HVAC solution tailored to the needs of Greater Montreal.
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The job on one screen
The article, chapter by chapter
Optimized comfort in an urban condo in Saint-Léonard
At AirGreen , we regularly carry out wall-mounted air conditioner installation projects in a variety of settings, from traditional Montreal duplexes to recent condos on the South Shore. In this case, our team was mandated to install a Komfort Thermo wall-mounted air conditioner , a compact and reliable unit, perfectly suited to the cooling needs of an urban condo located in the Saint-Léonard area.
A choice adapted to the real needs of the customer
The owner was looking for a simple and effective solution to maintain a stable temperature during the summer, while maintaining a discreet system that wouldn't monopolize the space. The Komfort Thermo brand offers units with a minimalist design, featuring a discreet digital display directly on the front, indicating the set temperature. In this case, the air conditioner was programmed to maintain a comfortable temperature of 20°C , ensuring constant and quiet cooling.
Technical challenges encountered
The installation had two particularities:
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Mounting height : The indoor unit had to be mounted under a lowered ceiling, which reduced the room for maneuver. Our technicians had to precisely adjust the holes to ensure proper passage of the refrigeration pipe without weakening the wall.
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Condensate management : The condo did not allow direct gravity drainage. We therefore integrated a discreet condensate pump , ensuring reliable and secure drainage, even when the unit is running continuously during the hottest days.
An installation process designed for sustainability
The refrigerant connections were carefully insulated and protected by discreet white capping matching the walls of the home. The outdoor condenser, meanwhile, was mounted on a sturdy wall bracket, with anti-vibration silent blocks to limit noise pollution in a dense urban environment like that of Saint-Léonard.
Long-term performance and savings
The Komfort Thermo wall-mounted air conditioner, in the configuration chosen by the customer, offers energy efficiency in accordance with Energy Star standards, allowing:
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A reduction in electricity consumption in air conditioning mode,
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Maintaining a stable temperature even during heat waves,
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Quiet operation, essential in a condo where rooms are close together.
In addition, the device is eligible for certain local grant programs, particularly for households on the North Shore, South Shore and Montreal, seeking to improve their energy efficiency through high-performance equipment.
AirGreen added value
Beyond the technical installation, we supported the client in all stages:
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Analysis of needs and precise sizing of BTU capacity,
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Preventive maintenance advice : filter cleaning, condensate control and annual inspection,
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Clear explanations on how to use the remote control and seasonal settings.
The owner highlighted the speed and cleanliness of our intervention: the installation was completed in a single day, with an aesthetic result perfectly integrated into the interior design of the condo.
Recommended maintenance and follow-up
As with any wall-mounted HVAC system , we advise the customer:
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Annual maintenance by our certified technicians,
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Regular dusting of filters to preserve air quality,
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Checking the tightness of refrigeration ducts to maintain optimal performance.
Thus, the Komfort Thermo wall-mounted air conditioner installed in Saint-Léonard not only represents an immediate gain in comfort, but also a sustainable investment that enhances the home while reducing energy costs.
Conclusion: a perfectly integrated installation in Saint-Léonard
Thanks to our expertise, we were able to overcome the constraints related to the condo's interior layout and deliver a reliable, discreet, and efficient installation. The Komfort Thermo wall-mounted air conditioner installed in this project is a perfect example of our expertise: offering residents of Greater Montreal—whether in Montreal, Laval, Longueuil, on the North Shore or the South Shore—HVAC solutions adapted to their urban lifestyle.
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).