Installation of an LG Wall-Mounted Air Conditioner in Outremont
AirGreen installed an LG wall-mounted air conditioner in Outremont, combining energy efficiency and discreet integration into a classic home. Optimal comfort and a design that respects the local architecture.
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.
An elegant and efficient integration into a classic residential setting
At AirGreen , we recently installed an LG wall-mounted air conditioner in a charming residence in Outremont , a neighborhood known for its heritage homes and elegant architecture. Our client's goal was clear: improve indoor comfort during Montreal summers while preserving the aesthetics of their living space.
A heritage-style environment
The house, with its original woodwork and stained-glass windows, presented an interesting challenge: integrating a modern air conditioning system without compromising the visual harmony of the space. Our team therefore opted for a high wall installation , just above the wooden frame, optimizing both air circulation and visual discretion .
Choice of model and technical advantages
The customer chose an LG wall-mounted air conditioner from the residential Inverter range, renowned for its reliability, low energy consumption and quiet operation .
Among its key features:
-
Inverter technology allowing automatic adjustment of power according to actual needs;
-
Energy-saving mode reducing consumption by up to 30%;
-
Noise level below 21 dB , ideal for bedrooms and relaxation areas;
-
Minimalist design that fits perfectly into any type of interior.
Technical details of the installation
Our technicians chose a discreet gravity route for condensate drainage, without a visible pump, guaranteeing a clean and durable integration . The wall drilling was carried out with care to avoid any impact on the heritage structure.
The interior head has been securely fixed to a load-bearing wall, and the refrigeration wiring runs behind a cover painted the same color as the wall, ensuring a flawless finish.
Optimal comfort for all seasons
Although this model is primarily a wall-mounted air conditioner , it has a supplementary heating function, which is particularly useful during the off-season. This means the owner can now enjoy adjustable thermal comfort all year round , without having to immediately use the main heating system.
Concrete benefits for the customer
A few days after installation, our client told us that he noticed a clear difference:
-
Stable and uniform temperature in the main room;
-
Reduced ambient noise compared to the old portable air conditioner;
-
Aesthetics preserved thanks to the careful integration above the stained glass window.
Our AirGreen commitment in Outremont
Every project we undertake, whether it's a wall-mounted heat pump , a central air conditioner or a multi-zone system , is based on the same values: rigor, respect for architecture, and energy efficiency . In a residential sector like Outremont, where architectural character is essential, this approach takes on its full importance.
Maintenance and durability
In order to guarantee the longevity and optimal performance of the device, we have scheduled an annual maintenance service with the customer including:
-
Complete cleaning of filters and evaporator;
-
Checking electrical and refrigerant connections;
-
Checking refrigerant levels;
-
System calibration to maintain Energy Star performance.
At AirGreen, we believe that regular maintenance is essential to maintain indoor air quality , reduce energy consumption and avoid costly repairs.
A project representative of our know-how
This installation in Outremont perfectly illustrates our expertise in integrating modern HVAC systems into environments with a traditional feel. Every detail, from the position of the wall head to the color of the capping, has been designed to combine aesthetics and performance .
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?
Pick what looks like your need.
Four mistakes we do not make
Flip each card to see what we do instead.
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.
Useful pages for what comes next
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.
Tell us about your house. We come and see it for free.
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).