Installation of a Gree wall-mounted heat pump in a residential garage in Brossard
In this project in Brossard, AirGreen installed a Gree wall-mounted heat pump in a garage equipped with an electric vehicle charging station. The result: a comfortable and functional space, both summer and winter, with a discreet, high-performance installation designed for the Quebec 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.
At AirGreen , we are often called upon to transform "technical" spaces – such as a garage – into comfortable and useful year-round areas. That's exactly what we accomplished here, in a residential garage in Brossard , with the installation of a Gree wall-mounted heat pump .
The context: a garage converted into a living space
The client uses their garage not only to park their vehicle, but also as a workspace and storage area. It includes:
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A wall-mounted electric vehicle charging station
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An electrical panel nearby
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A smoke detector on the ceiling
In short, a modern, secure environment that deserved thermal comfort to match.
The need was twofold:
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Heating the garage in winter so that it can be moved around and worked in without suffering from the Quebec cold.
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Cooling in summer , when the space quickly becomes stifling, especially with a vehicle parked inside.
Choosing a Gree wall-mounted heat pump
To meet these requirements, we recommended a new generation Gree wall-mounted heat pump, approximately 12,000 BTU , perfectly sized for a well-insulated residential garage.
This solution offers several advantages:
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Efficient heating in winter , even at low outside temperatures
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Efficient air conditioning in summer , to keep the air cool and dry
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Quiet operation , important in a room adjacent to the house
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Inverter technology , which continuously adapts the power and maximizes energy savings
The Gree brand is known for the reliability of its mini-splits and integrates very well into residential projects in Greater Montreal.
A clean and safe indoor installation
The photo shows the Gree wall-mounted head installed high up, very close to the ceiling. This positioning is not accidental:
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It allows for a homogeneous distribution of air throughout the entire volume of the garage.
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It frees up wall space for storage, the electrical panel, and the charging station.
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It protects the unit from potential impacts (tools, bicycles, car doors).
The adjustable blades direct the airflow either towards the center of the garage or towards the work area, depending on the customer's needs.
To the right of the unit, we installed a white cable tray that conceals the refrigerant lines, the condensation drain, and the wiring. The result: a clean, discreet, and easy-to-maintain finish, perfectly suited to a garage already equipped with visible electrical installations.
The condensation drain is sloped correctly to evacuate water to the outside, preventing any infiltration or puddle on the ground.
Integration with the electric vehicle charging station
An important aspect of this project was the proximity of the electric vehicle charging station . We have:
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Checked the routing of existing cables to avoid any conflict with the heat pump ducts.
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Position the wall-mounted head so that the airflow does not blow directly onto the terminal or the cables.
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Coordinated the power supply of the heat pump with the panel already heavily used by charging the vehicle.
The result is a coherent and functional garage: the customer can recharge their vehicle in a temperature-controlled space, which is ideal both for their comfort and for the durability of certain components.
The outdoor unit: designed for Quebec winters
Although it doesn't appear in the photo, the Gree outdoor unit was installed outside, on the other side of the wall:
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On raised wall supports , to protect it from snow accumulation.
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With anti-vibration silent blocks , to prevent the transmission of noise to the garage walls.
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By providing sufficient clearance for airflow and access for future maintenance.
We also took care to orient the unit in such a way as to limit direct exposure to the prevailing wind, which helps the heat pump maintain excellent performance during periods of extreme cold.
Four-season comfort and energy savings
Thanks to this Gree wall-mounted heat pump, the customer now benefits from:
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From a comfortable garage in winter , even when the temperature drops well below zero.
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Fresh and dry air in summer , ideal for DIY projects, storing equipment or simply accessing your vehicle.
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A system that is much more energy-efficient than a simple electric convector heater or a portable space heater.
This 4-season comfort adds to the property's value and makes the garage truly usable all year round.
AirGreen support in Brossard and throughout Greater Montreal
As with each of our installations, we have:
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Advised the client on the sizing of the heat pump .
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Planned the routing of piping and wiring to minimize visual impact .
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Checked the entire system (pressure, vacuums, start-up, operating modes).
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Explained to the owner how the remote control works , the heating/cooling/dehumidification modes, and best practices for saving energy.
We also offer maintenance services (wall head cleaning, parameter checks, visual inspection of the outdoor unit) to ensure optimal long-term performance.
Do you have a Gree wall-mounted heat pump project in your garage?
Whether you are in Brossard, on the South Shore, in Laval or elsewhere in Greater Montreal , we can assist you with:
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Heat your garage, workshop or basement section
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Integrate your heat pump into an already equipped environment (charging station, workshop, mechanical room)
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We offer you the brand and configuration best suited to your needs.
At AirGreen, we combine technical expertise , careful installation and human after-sales service so that your HVAC system becomes a real asset for everyday comfort.
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.
Which type of equipment for your project?
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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?
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).
