Installation of a Gree wall-mounted air conditioner in Saint-Laurent
AirGreen installs a Gree wall-mounted air conditioner in Saint-Laurent. A powerful and discreet HVAC solution to improve comfort and energy efficiency in Montreal, Laval, Longueuil, the North Shore, and the South Shore.
Take a tour of the installation
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.
A residential project that improves daily comfort
At AirGreen , we recently installed a Gree wall-mounted air conditioner in a house in the Saint-Laurent district of Montreal . This type of project is very representative of the needs we regularly encounter: improving the comfort of a family while respecting the aesthetic and technical constraints of the home.
The indoor unit, elegantly mounted above a mirror in the living room, perfectly illustrates the importance of strategic positioning. This installation maximizes even air distribution while seamlessly integrating the unit into the decor.
Why choose a Gree wall-mounted air conditioner?
The Gree brand is today one of the world leaders in residential HVAC solutions . Its wall-mounted air conditioners are distinguished by:
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High energy efficiency , meeting strict consumption standards in Quebec.
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Quiet operation, essential in a living room or family room.
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Models compatible with provincial subsidies when equipped with superior heating and air conditioning performance.
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Proven durability , reducing long-term maintenance costs.
For a neighborhood like Saint-Laurent, where residences often combine modern spaces with multigenerational needs, a Gree wall-mounted air conditioner is an ideal choice.
Steps of installation carried out by AirGreen
Analysis and planning
Our certified technicians first performed a thermal analysis of the room to confirm the required capacity (in BTUs). This preliminary work is essential to ensure maximum efficiency and avoid overconsumption of energy.
Positioning the indoor unit
The unit was installed approximately two meters above the floor, just above a large wall mirror. This strategic choice allows for:
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Promote optimal air circulation .
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Reduce thermal shadow areas.
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Avoid visual obstruction while maintaining easy access for maintenance.
Passage of conduits and connections
The installation required discreet routing of the refrigeration piping and electrical wiring . Our teams always favor white capping that matches the walls, ensuring aesthetic integration. In this project, the route was short, which reduced the duration of the work and limited the visual impact.
Condensate management
Drainage was configured by gravity, avoiding the need for a condensate pump. This simple and reliable solution reduces the risk of long-term failure.
Immediate benefits for the customer
As soon as it was put into service, the family noted:
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Consistent freshness throughout the living room, even on hotter days.
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A significant drop in ambient humidity , increasing comfort.
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Optimized power consumption , thanks to Gree modulation technologies.
Local know-how serving Montrealers
At AirGreen, we don't limit ourselves to technical installations. We also support our clients in:
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Grant applications are available in Montreal, Laval, Longueuil, on the North Shore and the South Shore.
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HVAC maintenance tips to extend the life of your unit.
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After-sales service , always provided by our trained and experienced technicians.
This installation in Saint-Laurent perfectly illustrates our mission: to offer residents of Greater Montreal reliable, aesthetic and energy-efficient HVAC solutions.
The big day, step by step
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 would it look like 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.
Four mistakes we do not make
Flip each card to see what we do instead.
Your own project, step by step
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.
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.
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.
More jobs to see, near you
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Each dot: a town where AirGreen has published projects. The glowing dot: this job.
Every house has its constraints. We see them before we install.
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).