Installation of a Gree wall-mounted heat pump in a condo in Plateau-Mont-Royal
AirGreen installs a Gree wall-mounted heat pump in a Plateau-Mont-Royal condo, ensuring four-season comfort, high energy efficiency and access to available subsidies.
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.
Combining modern comfort and historical character
At AirGreen , we regularly work in apartments and condos in the Plateau-Mont-Royal region , where the typical architecture—brick walls, high ceilings, and tight divisions—requires precise technical choices. The installation of this Gree wall-mounted heat pump perfectly illustrates how we combine high-performance HVAC technology with respect for interior aesthetics .
Context of the intervention
Our client, living in a renovated condo in the Plateau , wanted to improve its four-season comfort. Despite good insulation, the summer heat accumulated by the brick walls and the cold of Montreal winters made the space difficult to live in. The choice fell on a high-efficiency wall-mounted heat pump from the Gree brand, renowned for its ability to perform down to -25°C and for its energy reliability.
Installation constraints and solutions
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Load-bearing brick wall : the installation of the indoor unit had to respect the integrity of the masonry. We opted for careful drilling, with watertight sealing and discreet white capping, guaranteeing both durability and visual integration.
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Condensates : the flow has been designed by gravity , which avoids the addition of a pump and reduces the risks of future maintenance.
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Aesthetics : the wall head has been positioned above the decorative frame, ensuring even air diffusion without harming the interior design.
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Electricity : A dedicated circuit was properly run to the panel, in accordance with RBQ standards.
Performance and energy efficiency
The installed Gree wall-mounted heat pump offers:
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A power of 12,000 BTU , ideal for a medium-sized Montreal condo.
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Energy efficiency (SEER2 > 20, HSPF2 > 10) , guaranteeing reduced bills for both air conditioning and heating.
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Inverter technology ensuring quiet operation and soft starts.
Grants and savings
Thanks to its Energy Star certification, this installation is eligible for the LogisVert, Hydro-Québec and Federal (Greener Homes) grant programs . We assisted the client in preparing their file, allowing a significant reduction in the net acquisition cost.
Result obtained
At the end of the project, our client benefits from:
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Stable interior comfort , summer and winter.
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A discreet and aesthetic system , perfectly integrated into a heritage condo.
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Optimized energy bills , thanks to a heat pump designed for the harsh winters of the Plateau-Mont-Royal.
AirGreen expertise in Greater Montreal
This project demonstrates our expertise in adapting HVAC systems to complex urban environments like the Plateau-Mont-Royal . Our certified technicians always ensure that every step—from model selection to final testing—meets both technical requirements and the comfort of our customers.
At AirGreen, we offer wall-mounted and central heat pump installations in Montreal, Laval, Longueuil, and on the North and South Shores. Our solutions are designed to maximize your comfort, protect your investment, and enhance the value of your property.
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).