Installation of a Gree wall-mounted heat pump in Rosemont–La Petite-Patrie
In Rosemont–La Petite-Patrie, our team installed a Gree wall-mounted heat pump under a balcony in a narrow backyard. The raised wall bracket, optimized airflow, and neat electrical finish ensure quiet, energy-efficient, four-season comfort, perfectly suited to Montreal's climate.

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.
In Rosemont–La Petite-Patrie, amidst typical Montreal duplexes with stacked wooden balconies, our team installed a Gree wall-mounted heat pump to improve comfort while keeping energy costs down. The project took place in a narrow backyard, already occupied by other outdoor units: a perfect setting to showcase our expertise in space optimization.
A project in a typical Montreal backyard
The Gree outdoor unit was installed under a wooden balcony, along a concrete foundation wall. It includes:
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A narrow passageway providing access to the rear of the building;
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Floor tiles to facilitate maintenance and movement;
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Other nearby mechanical equipment, belonging to other dwellings.
In this type of environment, every centimeter counts. We had to:
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Ensure sufficient clearance for air circulation ;
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Protect the device from snow, ice and falling objects from the balcony;
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Limit the noise perceived in the neighborhood and in the dwellings.
A Gree Inverter R-32 wall-mounted heat pump, efficient and discreet
The owner chose a Gree Inverter wall-mounted heat pump with R-32 refrigerant , sized to heat and cool his home year-round.
Some key features of the installed system:
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Inverter technology : the compressor modulates its power according to the actual demand, which reduces on/off cycles, increases comfort and extends the life of the device.
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R-32 refrigerant : more energy efficient than R-410A, with a reduced environmental footprint.
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Heating capacity adapted to Montreal's climate : the heat pump is designed to provide stable heating even in cold weather, while reducing dependence on electric or oil systems.
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Quiet operation : the large diameter fan and the casing design limit vibrations and noise levels, an important point in a shared courtyard.
This Gree wall-mounted system allows the owner to enjoy air conditioning in the summer and efficient heating in the winter , with a single compact unit.
A wall-mounted installation, sheltered under the balcony
The photo clearly shows that the Gree outdoor unit is mounted on galvanized steel wall brackets , securely anchored to the foundation. This choice offers several advantages:
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Elevated above ground level : the heat pump is protected against the accumulation of snow, ice and puddles.
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Easy access for maintenance : our technicians can work under the device for cleaning and inspection.
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Vibration reduction : Anti-vibration pads are installed under the unit's feet to prevent the transmission of vibrations to the wall and limit noise inside.
The placement under the wooden balcony is no accident. This configuration provides natural protection against direct rainfall, while leaving enough space around the heat pump for proper air circulation. We paid particular attention to:
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At the clearance in front of the fan;
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At the distance from the back wall;
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Positioning relative to the other nearby outdoor unit, to avoid any recirculation of hot or cold air.
Neat electrical and refrigeration details
On the right side of the unit, one can clearly distinguish:
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The dedicated electrical disconnect box , compliant with Code requirements;
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The insulated and protected refrigeration pipes are neatly routed to the indoor unit;
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The passage of communication cables, fixed and arranged to withstand the elements.
As always at AirGreen, we ensure that the installation not only complies with standards, but is also aesthetically pleasing and safe :
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The refrigeration lines are properly insulated to prevent energy loss and the risk of condensation.
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The cables are fixed in such a way as not to obstruct traffic or risk being torn out.
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The disconnection box is positioned within easy reach for our technicians and any authorized personnel.
Comfort, savings and peace of mind for the customer
Thanks to this Gree wall-mounted heat pump, the owner of this Rosemont–La Petite-Patrie apartment now benefits from:
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Four-season comfort : gentle and even warmth in winter, controlled coolness in summer;
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Significant energy savings compared to electric heating alone;
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The silence of modern, well-sized and well-installed equipment;
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A discreet installation, integrated under the balcony, which does not interfere with the aesthetics of the courtyard or the flow of traffic.
For the customer, it also means peace of mind knowing that the system is installed by a certified team, with local after-sales service and technicians who are thoroughly familiar with Gree products.
Your Gree heat pump project in Montreal
Whether you live in a Rosemont–La Petite-Patrie plex, a condo in the Plateau, or a single-family home in the suburbs, we adapt each Gree wall-mounted heat pump installation to your specific situation :
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Space constraints (balcony, narrow courtyard, side alley);
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Noise and close proximity to neighbors;
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Exposure to wind, snow and sun;
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Electrical specifications and heating requirements.
Are you considering installing a Gree wall-mounted heat pump or replacing an old system in Greater Montreal?
Contact us : we will be happy to assess your project, advise you on the correct sizing and offer you a careful installation, like this project in Rosemont–La Petite-Patrie.
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?
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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).
