Installation of a Gree wall-mounted air conditioner in Rosemont–La Petite-Patrie
Installation of a Gree wall-mounted air conditioner in Rosemont–La Petite-Patrie. AirGreen guarantees optimal summer comfort with a high-performance HVAC solution adapted to urban housing.
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 typical of Greater Montreal
In an apartment in the Rosemont–La Petite-Patrie neighborhood, our team recently installed a Gree wall-mounted air conditioner . This type of equipment, perfectly suited to urban housing, combines comfort, energy efficiency, and discreet design. The client's goal was clear: improve summer comfort while ensuring reliable performance and careful installation, respecting the constraints of a Montreal condo.
Why choose a Gree wall-mounted air conditioner?
The owner had compared several options before choosing the Gree brand, renowned for its Energy Star appliances, capable of offering excellent value for money. The chosen wall-mounted air conditioner is distinguished by:
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A compact and elegant design , fitting perfectly into a modern interior.
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A capacity adapted to the surface area of the living room and adjacent rooms.
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High energy efficiency , helping to reduce electricity consumption.
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Quiet operation , essential in an urban living space.
For this type of equipment, subsidies may sometimes be available under energy efficiency programs in Quebec, depending on seasonal performance and installation conditions.
The particularities of the installation
Discreet and efficient indoor unit
The indoor unit was installed high up on a central wall in the living room, just above the media area. This arrangement ensures even distribution of fresh air while preventing the flow from being directed directly toward the sofa. Aesthetics were a priority: no visible ductwork, and the cable outlets were carefully concealed using capping that matched the wall color.
Drilling and connections
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Wall drilling optimized to minimize the length of the refrigeration path.
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Discreet passage of pipes to the exterior, reducing visual impact.
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Gravity drainage for condensates, avoiding the addition of a pump and ensuring simpler maintenance.
Technical constraints and solutions provided
The main challenge was the interior layout: the presence of an adjoining bookcase and a wall-mounted television limited the space available for maneuvering. Our team therefore carefully adjusted the placement to ensure sufficient clearance around the unit for future maintenance, while still meeting airflow standards.
Results and customer satisfaction
Upon commissioning, the customer immediately noticed the difference: cool, uniform air and a machine that was virtually inaudible even in intensive mode. Installation took half a day, including a complete system test and a detailed explanation of the regular maintenance to be carried out:
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Periodic cleaning of air filters.
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Annual inspection of ducts and sealing.
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Professional inspection recommended before each summer.
AirGreen expertise in Montreal and its surrounding areas
At AirGreen , we understand that every home in Greater Montreal—whether in Montreal, Laval, Longueuil, on the North Shore, or the South Shore —has its own unique challenges. Our qualified installers tailor each project to combine performance, aesthetics, and optimal comfort. This installation in Rosemont perfectly illustrates our approach: customized solutions that meet the client's expectations and the constraints of the built environment.
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.
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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).