Installation of a Gree wall-mounted heat pump in Saint-Laurent
Installation of a Gree wall-mounted heat pump in Saint-Laurent. AirGreen offers complete HVAC services in Montreal, Laval, Longueuil, North Shore, and South Shore.
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.
Careful installation for lasting comfort in a residential environment
At AirGreen , we pride ourselves on providing reliable HVAC solutions tailored to the specific needs of each residence in Greater Montreal. Our recent installation of a Gree wall-mounted heat pump in the Saint-Laurent district is a perfect example of our expertise and attention to detail.
Installation context
The project involved a typical single-family home in the area. The owners wanted to replace an old, energy-intensive electric heating system with a more efficient and economical solution . After analysis, we recommended the installation of a Gree wall-mounted heat pump , known for its reliability in cold climates and its energy efficiency, which meets Quebec grant criteria.
Equipment selection: the Gree range
The Gree brand is one of the world's leading manufacturers of wall-mounted heat pumps. Designed to withstand Quebec winters, the installed range allows for:
-
Stable performance down to -25°C .
-
Quiet operation, ideal for dense residential areas like Saint-Laurent.
-
Compatibility with provincial and federal grant programs.
-
Reduced energy consumption , generating savings on the electricity bill.
Technical details of the installation
The outdoor unit was installed on a raised aluminum structure , avoiding direct contact with the ground and ensuring sufficient clearance in the event of snow accumulation. The supports used guarantee optimal stability and facilitate future maintenance.
We paid particular attention to:
-
Positioning under the exterior staircase , in order to protect the unit from bad weather while respecting regulatory clearances.
-
The routing of the refrigerant lines is discreetly covered to preserve aesthetics.
-
The installation of a gravity flow system to prevent any accumulation of water near the foundations.
Constraints and solutions provided
Two main challenges arose during this project:
-
Limited space under the exterior staircase.
→ We designed a compact installation, without compromising the air circulation necessary for the heat pump to operate properly. -
Proximity to a basement window .
→ Thanks to precise positioning, we avoided any noise nuisance for the occupants.
Result and benefits for the customer
The customer now benefits from four-season interior comfort , with:
-
A stable and pleasant temperature in summer and winter.
-
A significant reduction in energy consumption.
-
Access to advantageous subsidies thanks to the system's certified energy efficiency.
This installation perfectly illustrates how AirGreen adapts each project to the specific constraints of the site , while guaranteeing sustainable performance and peace of mind for the occupants.
AirGreen expertise in Greater Montreal
Whether in Montreal, Laval, Longueuil, on the North Shore or the South Shore , our team is recognized for:
-
Meticulous and standard-compliant installations.
-
In-depth knowledge of available grant programs .
-
Responsive after-sales service focused on customer satisfaction.
By choosing AirGreen, you are choosing a trusted partner for your residential heating and air conditioning projects.
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.
More jobs to see, near you
By town, by equipment or by region: browse more than 4,700 published projects.
Each dot: a town where AirGreen has published projects. The glowing dot: this job.
Every house has its constraints. We see them before we install.
The on-site estimate is free and the quote follows within 24 hours.
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).