Installation of a Gree wall-mounted heat pump on a balcony in Côte-des-Neiges–Notre-Dame-de-Grâce
In Côte-des-Neiges–Notre-Dame-de-Grâce, AirGreen installed a Gree Inverter wall-mounted heat pump on the balcony of a high-rise condo. With its elevated mounting, drainage management, and adherence to condominium regulations, it offers a discreet and efficient solution for heating and cooling the unit year-round.
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The job on one screen

The article, chapter by chapter
In this large brick building in Montreal's Côte-des-Neiges–Notre-Dame-de-Grâce neighbourhood, condo owners wanted to finally enjoy true year-round comfort without cluttering the interior or disturbing the neighbours. They called on our team to install a Gree Inverter wall-mounted heat pump on their balcony, an ideal solution for upper-floor units.
Context: a high-rise condo, a balcony to optimize
The building is typical of the neighborhood: brick facade, concrete balconies, and an unobstructed view of the surrounding institutional buildings and trees. The condo has a concrete balcony with a solid railing, deep enough to accommodate furniture… but there's no question of turning it into a utility room.
Our objectives were clear:
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install the Gree outdoor unit safely and in accordance with the condominium rules;
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preserve the usable space of the balcony for the occupants;
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ensure good air circulation and quiet operation;
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anticipate the constraints of the Montreal climate (snow, ice, extreme cold).
The chosen solution: a Gree Inverter wall-mounted heat pump
Inside, the system consists of a discreet wall unit that heats and cools the main living area of the condo (living room, dining room, and open-plan kitchen). Outside, there is a single-zone Gree Inverter condenser , perfectly suited to the size of a 3½ or 4½ apartment.
The advantages of this Gree wall-mounted heat pump:
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Inverter technology : power is continuously adjusted according to actual needs, which reduces frequent starts, increases comfort and decreases electricity consumption.
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Acoustic comfort : the outdoor unit operates at a low noise level, an essential point in a close-knit condominium environment.
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Heating performance : the system provides efficient heating over a wide temperature range, which helps to limit the use of electric baseboard heaters and reduce Hydro-Québec bills.
Installation details on the balcony
The photo shows the Gree condenser installed against the brick wall, on a raised aluminum support , itself securely anchored in the concrete slab of the balcony.
Vibration stabilization and management
We chose a metal support:
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to raise the unit and protect it from rainwater and snow that may accumulate on the balcony;
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to allow continuous airflow under the device;
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to limit the transmission of vibrations in the structure, thanks to feet equipped with anti-vibration pads and calibrated tightening.
Result: the unit remains stable, silent and does not transmit any nuisance to the neighbors above or below.
Compliance with clearances and air circulation
The balcony is surrounded by concrete walls. It was therefore essential to:
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respect the lateral and frontal clearances recommended by Gree to avoid any recirculation of hot air;
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position the unit at a sufficient distance from the door and windows so as not to obstruct traffic or outdoor furniture;
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Orient the machine to take full advantage of the balcony opening, so that the air can be freely renewed.
This attention to detail ensures optimal performance, both in air conditioning in the summer and in heating in the winter.
Drainage and defrosting management
On the ground, a slightly different area is visible in the slab, corresponding to a former drainage point. We took advantage of this location to:
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promote the flow of condensation and defrost water towards the lowest point of the balcony;
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prevent water from stagnating under the device and forming ice in winter;
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maintain a safe circulation area for occupants.
Aesthetic integration and compliance in co-ownership
In a condo, aesthetics and compliance with building regulations are paramount. For this project:
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The refrigeration lines and electrical cable are grouped together and protected in a sheath running along the brick wall, with a clean and sealed wall penetration;
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the condenser is placed behind the solid guardrail, making it virtually invisible from the street , while remaining accessible for maintenance;
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The installation complies with the usual requirements of condominium associations: neutral color, no anchoring in the railings, respect for emergency exits and permissible weights on the balcony.
We have obviously provided a dedicated circuit breaker and a means of switching off nearby, in accordance with the electrical code and the manufacturer's recommendations.
Everyday comfort for condo occupants
Thanks to this Gree Inverter wall-mounted heat pump, the occupants now benefit from:
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rapid and even cooling in summer, without having to install or remove window air conditioners;
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economical heating in mid-season and for a good part of the winter, which reduces the overall bill and increases comfort;
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of a system that can be easily controlled from the remote control (or a smart thermostat/control depending on the options chosen);
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with discreet operation, without constant buzzing on the balcony.
This is a particularly attractive solution for co-owners who wish to increase the value of their condo while improving their quality of life.
The AirGreen approach to condos in Montreal
Installing a heat pump on a condo balcony is not just a matter of "placing a machine":
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We analyze the structural constraints (balcony load capacity, slab condition, access).
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We take into account the condominium regulations and, if necessary, we help the client prepare the documents for the syndicate.
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We choose the brand and capacity best suited to the client's accommodation and budget.
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We deliver a clean, safe and durable installation, respecting Gree recommendations and industry best practices.
This project in Côte-des-Neiges–Notre-Dame-de-Grâce illustrates our way of working: meticulous work, adapted to the urban context and designed to offer maximum comfort while respecting the building and the neighborhood.
If you are a co-owner in Montreal, Laval or on the South Shore and are considering installing a Gree wall-mounted heat pump on your balcony, our team will be happy to assess your situation and offer you a customized solution.
The job tools
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.
How the job unfolds
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 we check on a job like this one
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.
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.
Good habits, once the unit is in place
Six simple habits that keep the unit going. Your list stays on this device.
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.
The right pages, at the right time
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).
