Installation of a Gree wall-mounted heat pump in a house in Plateau-Mont-Royal
Installation of a Gree wall-mounted heat pump in Plateau-Mont-Royal by AirGreen, combining comfort, energy efficiency and eligibility for Quebec 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.
Tailor-made comfort for a living room bathed in light
In a charming residence in Plateau-Mont-Royal , we recently installed a wall-mounted heat pump that perfectly meets the comfort needs of our clients. Located in a largely glazed living room, overlooking an interior courtyard typical of the neighborhood, the installation had to ensure an optimal balance between energy efficiency, aesthetic discretion and adaptation to the warm style of the place.
Choice of equipment
For this project, the owner opted for a Gree wall-mounted heat pump , renowned for its reliable performance in northern climates and its ability to maintain consistent comfort, summer and winter. The wall-mounted configuration is ideal for this type of room: the large windows often cause temperature variations that only a high-performance machine can effectively compensate for.
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Capacity : 12,000 BTU, perfectly suited to the size of the dining room and adjacent work space.
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Energy efficiency : high SEER2 and HSPF2 efficiency optimized for Montreal winters.
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Eligibility for subsidies : this model complies with the criteria of the Hydro-Québec and LogisVert programs, allowing occupants to benefit from attractive financial support.
Challenges encountered
The installation presented two major constraints:
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An interior wooden wall : it was necessary to drill carefully in order to preserve the aesthetics and integrity of the existing finish.
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A narrow courtyard : the passage of the pipes to the outside had to be carefully planned to avoid any visual disturbance and preserve the existing landscaping.
Our technicians met these challenges meticulously: the drilling was carried out cleanly, with discreet capping, and the refrigeration connections were optimized for a short and aesthetic route.
Installation Steps
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Preparation of the interior head : positioned in the center of the wall, just above the mirror, to ensure even diffusion of air.
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Exterior wall drilling : carefully aligned to minimize visual impact and reduce pipe length.
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Installation of the capping : chosen in a neutral color to blend in with the red brick facade of the courtyard.
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Electrical connection : secure connection, in accordance with RBQ standards and electrical codes in force in Montreal.
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Start-up and testing : checking pressures, calibrating the remote control, and adjusting the airflow according to occupant preferences.
Final result
The result is both discreet and efficient. The Gree wall-mounted heat pump blends perfectly with the room's warm aesthetic, dominated by natural wood and decorative handcrafted touches. Thanks to its well-designed installation, the owners now enjoy:
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constant comfort , whatever the season;
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reduced energy bills , thanks to higher efficiency;
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of a system ready for Montreal winter , capable of operating even in extreme cold;
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of a sustainable installation guaranteed by AirGreen expertise.
Why trust AirGreen?
At AirGreen , we understand that every home and neighborhood in Montreal has its own unique characteristics. In areas like the Plateau-Mont-Royal, where architecture combines heritage and modernity, our projects stand out for their precision and ability to seamlessly integrate HVAC systems into existing spaces.
Our expertise covers not only the installation of wall-mounted heat pumps , but also complete support: choice of model, analysis of subsidies, preventive maintenance and after-sales service.
Conclusion
This installation of a Gree wall-mounted heat pump in a home in Plateau-Mont-Royal perfectly illustrates our expertise: precise work, respectful of the aesthetics of the space, and focused on energy performance. With AirGreen, residents of Montreal, Laval, Longueuil, the North Shore, and the South Shore benefit from lasting comfort and trusted support.
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).