Installation of a Sharp wall-mounted air conditioner in Saint-Laurent
Installation of a Sharp wall-mounted air conditioner in Saint-Laurent by AirGreen. HVAC expertise for Montreal, Laval, Longueuil, North Shore and South Shore with comfort, performance and meticulous workmanship.
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 wall-mounted air conditioning installation project suitable for a modern condo
At AirGreen , we know how essential indoor comfort is in urban neighborhoods like Saint-Laurent . The installation of a Sharp wall-mounted air conditioner in this condo perfectly illustrates our approach: combining technical expertise, respect for the space, and the pursuit of optimal energy efficiency.
Project background
The client lived in a new, well-insulated condo that quickly became uncomfortable during the summer heat. After considering several options, we recommended installing a Sharp wall-mounted air conditioner . This choice was made because:
-
Reliability of the Sharp brand , recognized for the durability of its systems.
-
Energy performance adapted to current standards, with stable output even in high heat.
-
Discreet aesthetics of the interior unit, integrating perfectly into the modern space of the condo.
Step by step installation process
-
Preliminary assessment : inspection of the chosen wall, located in the main room, to determine the best route for the refrigerant and electrical pipes.
-
Wall mounting : the indoor unit has been installed high up for even air distribution, while avoiding direct circulation areas.
-
Drilling and wiring : A conduit passing through the exterior wall was carefully executed. Insulation and sealing were reinforced to prevent any energy loss.
-
Installation of the outdoor unit (not visible in the photo): installed on a stable slab, with adequate clearance to ensure air circulation.
-
Connection and vacuuming : The refrigerant lines were connected, followed by a pressure test to check for leaks.
-
Commissioning : Once the installation was validated, the system was started up and calibrated according to the customer's needs.
Important technical points
-
Electrical wiring integrated directly into the dedicated circuit, guaranteeing safety and compliance.
-
Condensation management by gravity flow, avoiding the need for a condensate pump.
-
Discreet capping matching the wall, allowing for a neat and aesthetic finish.
Customer Benefits
-
Immediate comfort : a stable and pleasant interior temperature from the first day.
-
Energy savings thanks to a high-efficiency appliance.
-
Potential eligibility for Energy Star system grants , available to residents of Montreal, Laval, Longueuil, the North Shore and the South Shore.
-
Peace of mind with the manufacturer's warranty combined with maintenance recommended by our technicians.
Project testimony
The owner shared his satisfaction with us: the unit is quiet, efficient, and blends perfectly into the condo's interior design. This type of result reflects our ongoing commitment to offering solutions tailored to the specific needs of each home.
Recommended maintenance
We always remind our customers of the importance of regular HVAC maintenance :
-
Clean the filters every 3 months.
-
Complete annual inspection by our AirGreen technicians.
-
Checking refrigerant levels and energy performance.
Why choose AirGreen for your HVAC installation in Montreal and its surrounding areas?
At AirGreen, we combine expertise, speed of execution, and attention to detail. Whether in Montreal, Laval, Longueuil, on the North Shore or the South Shore , we support our customers from the choice of the device to the final start-up, while maximizing their comfort and savings.
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).