Installation of a Gree wall-mounted heat pump in Rosemont–La Petite-Patrie
AirGreen installed a Gree wall-mounted heat pump in a condo in Rosemont–La Petite-Patrie. A high-performance HVAC solution adapted 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.
An HVAC installation project in the heart of an urban condo
At AirGreen , we are regularly called upon for projects in dense urban environments, where architectural and technical constraints require a precise approach. This Gree wall-mounted heat pump installation in a condo in Rosemont–La Petite-Patrie, Montreal, perfectly illustrates our expertise in HVAC solutions adapted to multi-unit buildings .
The outdoor unit is installed on a stable metal structure directly against a brick wall, typical of Montreal buildings. The location—a narrow balcony overlooking the rear of a building—required careful organization of the available space, while respecting safety and air circulation standards.
Why choosing a Gree heat pump is a good idea in Montreal
The Gree brand is increasingly establishing itself as a key player in the Quebec wall-mounted heat pump market. Thanks to their high energy performance, Gree units offer excellent performance even in periods of intense cold, down to -25°C for some models. This means:
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Comfort in all seasons : efficient heating in winter, efficient air conditioning in summer.
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Energy savings through competitive SEER and HSPF ratings.
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Compatibility with grant programs such as LogisVert or the Federal Energy Renovation Program.
For this project, the client wanted to replace an energy-intensive portable air conditioner with a permanent, reliable, and quiet system. The Gree wall-mounted heat pump emerged as the optimal solution, both in terms of performance and value for money.
The technical challenges of the installation
Managing restricted space
The balcony had limited depth, so we opted for a raised galvanized steel support , allowing the floor slab to be clear and ensuring sufficient clearance for ventilation of the unit. This configuration also facilitates future maintenance.
Drilling and crossing the brick wall
The solid brick facade requires rigorous engineering. Precise core drilling allowed the refrigeration and electrical conduits to be routed to the indoor unit, ensuring a perfect seal. Discreet white capping was installed inside for an aesthetically pleasing appearance, and professional sealing protected the exterior from water infiltration.
Condensate management
Given the height, we opted for natural gravity drainage , avoiding the addition of a condensate pump which would have generated additional costs and maintenance.
A project carried out according to the rules of the art
The work was carried out in a single day by a team of two certified technicians. Each step, from drilling cores into the masonry to the electrical connection , was carried out in accordance with RBQ and Canadian Electrical Code standards.
Before commissioning, we carried out:
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A complete vacuum to eliminate all moisture in the refrigeration ducts.
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A pressure test to ensure the circuit is watertight.
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Calibration of the indoor unit to optimize the thermal comfort of the condo.
The customer immediately noticed the difference: silence, consistent freshness, and above all the prospect of reduced electricity bills in the medium term.
Concrete benefits for the customer
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Four-season comfort : heating and air conditioning integrated into a single unit.
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Available grants : The installed Gree heat pump is eligible for provincial and federal programs.
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Respected aesthetics : careful installation, discreet capping, robust but compact support.
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Simplified maintenance : direct access to the outdoor unit on the balcony.
Conclusion: an exemplary HVAC installation in Rosemont
This project illustrates how a Gree wall-mounted heat pump installation in Rosemont–La Petite-Patrie can transform the comfort of an urban condo. Despite space and masonry constraints, the AirGreen team was able to deliver an efficient, sustainable solution adapted to Montreal's climate.
Whether you own a condo, a plex or a house, we offer turnkey HVAC solutions throughout Montreal, Laval, Longueuil, on the North Shore and the South Shore.
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.
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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?
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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).