Installation of a Gree wall-mounted heat pump in Montreal North
AirGreen installed a Gree Inverter wall-mounted heat pump on a brick wall in Montreal North. Mounted on wall brackets with vertical ducting, the unit frees up floor space, provides excellent four-season comfort, and blends discreetly into the residential building.
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For this project, we were called to a brick residential building in Montreal North . The client wanted to modernize their air conditioning system and add efficient supplemental heating for the winter, without encroaching on the floor space already cluttered with materials and technical pipes.
Our recommendation: the installation of a Gree Inverter single-zone wall-mounted heat pump , fixed directly to the exterior wall on brackets, with refrigerant lines covered along the entire height.
A typical building in Montreal North, with its very real constraints.
The building is a brick residential block, like many seen in Montreal North:
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solid red brick wall;
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ground space occupied by pipes, some vegetation and stored equipment;
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occasional visits for maintenance around the building.
In this context, installing the condenser on the floor would have posed several problems:
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risk of obstruction by snow in winter;
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accumulation of dust, leaves and debris;
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hindering movement and future work on the pipes located at the bottom of the wall.
We therefore opted for a wall-mounted installation on metal supports , in order to free up floor space and optimize air circulation around the machine.
Choosing the Gree wall-mounted heat pump
We opted for a Gree Inverter wall-mounted heat pump of approximately 18,000 BTU , ideal for covering the main living area of the dwelling:
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Inverter technology : power is continuously adjusted according to demand, which limits temperature variations and reduces electricity consumption.
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Efficient heating mode in winter : the heat pump remains effective even when outside temperatures drop, making it an excellent complement to existing heating.
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Compact and silent format : a major advantage for a dense residential environment, where acoustic comfort is as important as thermal comfort.
Inside, the Gree wall head ensures a gentle and uniform air distribution , allowing the customer to enjoy a stable temperature in summer and winter.
A clean and structured wall installation
The photo clearly shows the Gree condenser mounted high on the brick wall , along with a long, vertical, burgundy-colored duct that runs up the building. This installation isn't just for looks; it's designed for durability and performance.
Wall brackets and clearances
The condenser is mounted on sturdy wall brackets , with:
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sufficient clearance behind and under the machine to ensure good air circulation;
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anti-vibration pads under the legs to limit the transmission of vibrations to the masonry;
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a height calculated to remain above the projected snow and clear of the cluttered ground.
This choice ensures better protection of the condenser against the elements, while also facilitating maintenance interventions.
Vertical duct for refrigeration connections
The refrigeration lines, communication cable, and drain are grouped together in a vertical external trunking which:
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follows the facade over the entire necessary height;
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protects pipes from UV rays, shocks and inclement weather;
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provides an orderly visual presentation, important for preserving the building's appearance;
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allows quick access in case of diagnosis or repair.
The dark color of the gutter harmonizes with the brick, making the whole thing discreet despite the height.
Floor space management
At the base of the wall, there are metal pipes and construction equipment . We have:
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positioned the condenser high enough to free up technical space and not obstruct access to existing pipes;
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adjusted the length of the connections and the drain outlet to prevent any water stagnation and direct the flow away from the building;
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secured electrical cables and fittings so that they are not exposed to shocks or accidental handling.
The result: an installation that respects the reality on the ground while remaining perfectly functional and safe.
Four-season performance and comfort
Thanks to this Gree wall-mounted heat pump, the customer now benefits from:
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In summer : enjoy fast and efficient air conditioning, even during the heat waves that regularly affect Montreal North. Inverter technology ensures a stable temperature without unpleasant cold drafts.
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In the mid-season : a gentle supplementary heater, ideal when the central heating is not yet on, which prevents you from being too hot or too cold.
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In winter : a solution that relieves the main system and reduces the energy bill, while improving comfort in the main rooms.
The Gree heat pump also allows for better control of indoor humidity , which improves air quality and the feeling of comfort.
The challenges of exterior brick walls
Installing a heat pump on a brick wall requires specific expertise:
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Suitable anchors : we use plugs and anchors designed for masonry, capable of supporting the weight of the condenser over the long term.
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Respect for the structure : the positioning of the fixing holes is designed to avoid weakening the brick or the joints.
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Passage of connections : the wall penetration is carried out carefully to minimize air and water infiltration, then sealed and properly insulated.
At AirGreen, we are used to working on this type of facade, which is very common in the north and east of Montreal.
AirGreen support: from assessment to commissioning
As with all our projects, we handled the installation of this Gree wall-mounted heat pump in Montreal North on a turnkey basis:
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Visit and needs assessment
Analysis of the area to be air-conditioned/heated, site constraints and customer habits. -
Gree Capacity and Model Recommendation
Sizing of BTU power, choice of options (heating in extreme cold, noise levels, comfort functions). -
Installation planning
Defining the optimal location of the condenser and the routing of the connections, while taking into account the technical constraints on the ground. -
Professional installation
Installation of wall brackets, installation of the cable tray, refrigeration and electrical connection, pressure tests and commissioning. -
Explanation to the customer
We take the time to explain the operating modes, recommended settings and good maintenance practices to extend the life of the heat pump.
Are you considering a Gree heat pump for your house or building?
Whether you are in Montreal North, Saint-Léonard, Anjou or on the North Shore , our team can offer you a customized solution with Gree wall-mounted heat pumps, adapted to the Quebec climate and the specific characteristics of buildings in the greater Montreal area.
We combine technical expertise , careful installation and personalized support , so that your investment is profitable, sustainable and truly comfortable on a daily basis.
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).