Installation of a Lennox wall-mounted air conditioner in Chomedey
Professional installation of a Lennox wall-mounted air conditioner in Chomedey, Laval: summer comfort, reduced consumption and discreet integration into a row building.
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.
A residential project requiring precision and discretion
At AirGreen , we understand that installing a wall-mounted air conditioner isn't just about plugging in a unit. Each project has its own unique technical constraints and must fit seamlessly into the client's lifestyle. In this case, our team worked in Chomedey, Laval , to equip a condominium with a high-performance, discreet, and durable Lennox wall- mounted system.
The context of the intervention
The client, living in a red brick townhouse-style building, wanted to maximize summer comfort without compromising the exterior aesthetics. The available space on the façade was limited and shared with other co-owners: a compact and harmonious installation was therefore required. In addition, access to the front door and garage had to remain unobstructed at all times, which required careful planning of the location of the outdoor units.
Equipment Choice: Lennox Reliability
The owner opted for a Lennox wall-mounted air conditioner , renowned for its energy efficiency and quiet operation. Lennox units are among the most reliable on the Quebec market, particularly for urban housing where performance must go hand in hand with discretion.
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Brand: Lennox
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Type: Wall-mounted air conditioner (single unit)
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Installation: brick facade, on ground support with anti-vibration pads
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Key benefit: guaranteed summer comfort with low noise impact
Technical details of the installation
External positioning
Our technicians fixed the unit to a ground support, slightly raised above the asphalt. This choice avoids any direct contact with moisture and reduces the transfer of vibrations to the structure. Precise alignment with other systems already installed (immediate neighbors) allows for careful visual integration .
Wiring and piping route
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Direct drilling into the brick wall, with a short and optimized path.
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Installation of neutral-colored protective capping to conceal refrigerant connections and ensure maximum durability.
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Gravity routing of the condensation drain, avoiding the addition of a pump, thus limiting future maintenance.
Constraints and solutions
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Limited space: the unit must be positioned without blocking the door or access to the recycling bin. This is resolved by precisely offsetting the support .
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Co-ownership: installation compliant with standards and visually harmonized with the other condensers already in place.
Results obtained
Thanks to this installation, the owner now benefits from:
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Optimal comfort during summer heat waves.
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Reduced electricity consumption , thanks to a modern, Energy Star certified air conditioner.
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A discreet system that blends in with the aesthetics of the building.
AirGreen expertise in Chomedey and beyond
This installation perfectly illustrates our approach: analyze, adapt and deliver impeccable work , even in restrictive contexts. Whether in Montreal, Laval, Longueuil, on the North Shore or the South Shore, our specialized HVAC installation teams always prioritize quality, compliance and customer satisfaction.
How it goes, from the first call to the end
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.
And 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.
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.
Which type of equipment for your project?
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Four mistakes we do not make
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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?
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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).