Installation of a Gree wall-mounted heat pump in Plateau-Mont-Royal
AirGreen installed a Gree wall-mounted heat pump above the staircase of a Plateau-Mont-Royal apartment. Positioned on the landing, the unit ensures excellent heat and cooling distribution throughout the floor, for discreet and energy-efficient four-season comfort.
Take a tour of the installation
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.
In this charming apartment in Plateau-Mont-Royal , the owners wanted a heating and air conditioning system that was discreet, efficient and well suited to the particular configuration of the premises: a central wooden staircase connecting the floors, with a narrow landing and rooms opening onto the hallway.
We recommended the installation of a Gree wall-mounted heat pump , strategically positioned above the staircase to ensure optimal air distribution throughout the floor.
A central staircase as the heart of the house
The photo shows a light wood staircase with a matching railing, framed by white walls and a French-style glass interior door. This type of layout is very common on the Plateau.
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narrow corridor
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rooms that open on both sides,
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staircase which naturally concentrates the circulation of hot and cold air.
Rather than installing the heat pump in a single room, we chose the upper landing , directly above the stairs. This positioning allows for:
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to blow the air-conditioned air towards the hallway and adjacent rooms;
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to allow heat to descend by gravity to the lower floor in winter;
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to maintain a more uniform temperature throughout the dwelling.
Choosing a Gree wall-mounted heat pump
For this project, we opted for a high-efficiency Gree wall-mounted heat pump .
Why a wall-mounted heat pump?
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Ideal solution for existing homes without ducts;
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Quick and minimally intrusive installation;
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Excellent balance between comfort, energy saving and quiet operation ;
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High-performance heating mode to cope with Montreal winters, with integrated air conditioning in the summer.
The Gree wall-mounted heat pump installed here offers a capacity perfectly suited to a typical Plateau apartment floor, with excellent temperature control. The display shows 22°C , the comfort temperature chosen by the client.
Installation details: height, clearances and safety
The indoor unit is installed high up, just below the ceiling , in a recess above the staircase. This choice meets several technical and comfort criteria.
Installation height
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Hot air tends to rise: positioning the heat pump near the ceiling allows for better management of stratification and redirection of air where it is needed;
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The height complies with the clearances recommended by Gree to ensure good air circulation and easy maintenance;
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The unit does not obstruct movement on the stairs or the opening of doors.
Blowing direction
The Gree heat pump louvers are oriented so that:
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avoid a direct draft on the stairs, which could be uncomfortable;
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direct the air along the corridor, gradually distributing it towards the rooms;
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take advantage of the chimney effect of the staircase: warm air in winter can descend to the lower level, while cool air in summer diffuses upwards to balance the temperature.
Aesthetic integration
The Gree wall unit blends in very well with the decor:
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white finish that blends into light-colored walls;
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perfectly level installation, with neat cladding around the ducts;
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no annoying protrusions in the passage area.
The result: a system that is very discreet visually, but extremely present in terms of comfort.
Condensate management and refrigeration connection
Behind the unit, the refrigerant lines and condensate drain are enclosed and directed to the outside in a clean and safe manner:
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insulation protected in duct covers;
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adequate slope of the drain to evacuate condensation water in air conditioning mode, without risk of backflow or damage;
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perforations minimized so as not to weaken the structure around the staircase.
This attention to detail ensures a durable, clean and worry-free installation for the occupants.
Four-season comfort for accommodation on the Plateau
Thanks to this Gree wall-mounted heat pump, the occupants now benefit from:
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efficient heating in winter , even when temperatures drop;
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of efficient air conditioning during the summer heat waves typical of Montreal;
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a dehumidification mode useful during humid periods of spring and autumn;
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quiet operation, ideal for a home where rooms are close together.
The stair landing thus becomes a key distribution point , allowing several rooms to be treated with a single unit, while reducing energy costs.
A project by AirGreen: expertise and consulting
At AirGreen, we don't just attach a heat pump to the wall:
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We analyze the layout of your accommodation (staircase, corridors, closed or open-plan rooms);
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We choose the right capacity and location to optimize comfort;
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We install Gree equipment according to best practices, respecting electrical and refrigeration standards;
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We offer a complete after-sales service : maintenance, troubleshooting, usage advice.
Whether you live in Plateau-Mont-Royal, Rosemont, Verdun, Laval or the South Shore, we can offer you a Gree wall-mounted heat pump solution perfectly suited to your situation.
The big day, step by step
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 would it look like 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.
Four mistakes we do not make
Flip each card to see what we do instead.
Your own project, step by step
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.
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.
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).