Installation of a Gree wall-mounted heat pump in a backyard in Plateau-Mont-Royal
AirGreen installed a Gree wall-mounted heat pump in the backyard of a triplex in the Plateau-Mont-Royal neighbourhood. The outdoor unit is elevated, quiet, and unobstructed, providing reliable heating and cooling while respecting the aesthetics and space of the yard.
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The article, chapter by chapter
In this typical Plateau-Mont-Royal triplex, with its exterior metal staircase and sunken backyard, the owners wanted to enjoy year-round comfort without cluttering the interior or compromising the building's aesthetics. They chose to install a Gree wall-mounted heat pump to efficiently heat and cool their apartment while reducing their energy consumption.
A Gree wall-mounted heat pump adapted for Montreal plexes
The project consists of a state-of-the-art Gree wall-mounted heat pump , a mini-split system ideal for Montreal apartments. This type of installation offers:
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High-performance air conditioning during summer heatwaves.
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An efficient supplementary heater for autumn, spring and a good part of winter.
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Very low noise level, both inside and in the courtyard.
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High energy efficiency thanks to inverter technology.
Although the exact model is not visible in the photo, we are here in the range of Gree high-efficiency wall-mounted heat pumps , designed for the Quebec climate and compatible with the requirements of many energy efficiency programs.
Strategic positioning of the condenser on a wall bracket
The photo shows the Gree condenser installed on a foundation wall, right next to the entrance to the basement or garden-level apartment. We chose a wall-mounted installation rather than a floor-mounted one for several reasons:
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Protection against snow and ice : by being elevated, the unit remains clear even during the heavy accumulations typical of Montreal winters.
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Improved longevity : the device is not in direct contact with water, mud or gravel.
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Ease of maintenance : technicians can easily access the unit for annual maintenance or service checks.
The supports are securely fixed in the concrete structure, with anti-vibration blocks under the heat pump legs to minimize the transmission of vibrations to the building and to the nearby metal railing.
Air circulation and clearances respected
Despite the presence of the staircase and balcony above, the Gree unit benefits from sufficient clearance for air circulation :
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The front of the condenser is completely unobstructed, allowing the fan to freely circulate outside air.
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The sides and top comply with the minimum distances recommended by Gree to avoid the recirculation of hot or cold air.
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The chosen location avoids blowing directly towards the neighbors or towards the relaxation areas of the yard.
This thoughtful positioning ensures stable performance in both summer and winter , while respecting the peace and quiet of the occupants and the neighborhood.
Discreet routing of refrigerant lines and drain
The refrigerant lines (insulated copper pipes) and communication wiring run directly to the indoor unit through the wall behind the condenser. We used a rigid protective cover to:
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Protect the pipes against UV rays, shocks and freeze/thaw cycles.
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Give a clean and uniform appearance to the technical passage on the facade.
The condensate drain is designed to evacuate the water produced in air conditioning mode away from the pedestrian walkway, thus preventing water accumulation and ice on the ground.
A harmonious integration into the backyard
In the alleys and backyards of Plateau-Mont-Royal, space is often limited and shared: stairs, balconies, recycling bins, outdoor furniture… Our challenge is to find a location that respects the lives of the occupants while respecting the technical constraints of the heat pump.
Regarding this project:
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The unit remains visually discreet , neatly aligned under the balcony structure.
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It does not obstruct passage or access to the door.
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The noise is minimized, which is appreciated for enjoying the courtyard in the summer.
Our AirGreen sticker applied to the condenser housing clearly identifies the installer and facilitates service tracking for customers.
Performance and comfort for Montreal winters
The Gree wall-mounted heat pump installed here is designed to operate reliably for much of the Montreal winter:
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The variable speed compressor adjusts its power according to the actual heating demand, which reduces electricity consumption.
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Defrost cycles are managed automatically to maintain a good level of performance even in wet and cold weather.
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In summer, the air conditioning and dehumidification modes ensure constant comfort, preventing the air from feeling heavy in the home.
Homeowners thus benefit from four-season comfort , with a better-controlled energy bill than with window devices or electric baseboard heaters used alone.
AirGreen, your partner for Gree heat pumps in Montreal
At AirGreen, we assist homeowners in Plateau-Mont-Royal and throughout Greater Montreal with the selection and installation of their Gree wall-mounted heat pumps :
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Analysis of the layout of the dwelling and the backyard.
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Sizing of capacity (BTU) according to actual needs.
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Advice on potential eligibility for financial assistance programs.
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Careful installation, in accordance with the manufacturer's standards and recommendations.
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After-sales service and maintenance to ensure the durability of the equipment.
Are you considering installing a Gree heat pump in your Montreal plex?
Contact us: we will be delighted to offer you a tailor-made, clean, quiet and efficient solution, perfectly integrated into your building.
The job tools
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.
How the job unfolds
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 we check on a job like this one
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.
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.
Good habits, once the unit is in place
Six simple habits that keep the unit going. Your list stays on this device.
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.
The right pages, at the right time
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).