Installation of a Gree wall-mounted heat pump in Rosemont
Installation of a Gree wall-mounted heat pump in Rosemont by AirGreen. A reliable and energy-efficient HVAC solution for Montreal duplexes, ensuring comfort in both summer and winter.
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.
A four-season comfort solution adapted to Montreal plexes
At AirGreen , we recently completed the installation of a Gree wall-mounted heat pump in a typical duplex in the Rosemont–La Petite-Patrie neighborhood. The project perfectly illustrates the challenges and solutions associated with Montreal's red brick buildings, where space optimization and installation security are essential.
Client context and needs
The owner wanted to replace an old air conditioner with a more complete and energy-efficient solution. The objectives were clear:
-
Have a system capable of providing both air conditioning in summer and heating in winter .
-
Reduce your electricity bill with efficient inverter technology .
-
Install a reliable device that can withstand Montreal's winter conditions.
-
Integrate the machine without harming the aesthetics of the building facade.
Choosing the Gree heat pump
The Gree brand is a wise choice for Montreal plex owners because it combines:
-
High energy efficiency with stable performance even at negative temperatures.
-
Versatility : heating in winter, air conditioning in summer.
-
Reliability : Compressors designed for northern climates.
-
Compatibility with grant programs , including LogisVert and Canada Greener Homes, under certain performance conditions (-25°C).
Technical details of the installation
-
Building type : brick duplex typical of Rosemont.
-
Fixing : installation of the outdoor condenser on reinforced wall brackets on the second floor, in order to free up floor space and avoid risks linked to snow accumulation.
-
Capping : installation of discreet white capping along the facade, protecting the refrigeration connections and electrical wiring.
-
Drainage : gravity management, with secure outlet to prevent infiltration.
-
Access : use of a professional ladder and establishment of a safety perimeter, as installation required work at height.
-
Power supply : connection via a safety box installed on the facade, compliant with HVAC standards.
Constraints and solutions adopted
Two main challenges arose:
-
Working at height : With the outdoor unit fixed to the second floor, the team took all necessary measures to ensure safety, while ensuring a robust installation.
-
Aesthetic integration : in order to respect the appearance of the facade, the capping was carefully aligned and painted to blend in as best as possible with the brick.
Results and benefits for the client
The owner now benefits from:
-
Four-season comfort in your home.
-
A reduction in its energy consumption , thanks to the modulation of the Inverter compressor.
-
A reliable, secure and aesthetic installation, adapted to the configuration of your plex.
-
The possibility of reducing the purchase cost through subsidies available in Quebec.
AirGreen expertise serving Montreal plexes
Duplexes and triplexes in neighborhoods like Rosemont, Villeray, Hochelaga, and the Plateau often present specific challenges: brick facades, lack of a spacious backyard, and limited roof access. Thanks to our experience, we adapt each installation to ensure optimal performance and seamless integration.
Why entrust your HVAC installation to AirGreen?
-
Proven expertise in the installation of Gree wall-mounted heat pumps and other major brands .
-
Safe interventions, even in complex conditions (working at height, old plexes).
-
Complete coverage of Greater Montreal: Montreal, Laval, Longueuil, North Shore, South Shore .
-
Personalized support including grant research and after-sales follow-up .
Conclusion
This installation of a Gree wall-mounted heat pump in Rosemont demonstrates that it's possible to combine performance, aesthetics, and safety in a typical Montreal-style building. With AirGreen, each project is designed to meet the unique needs of clients while adhering to the highest HVAC industry standards.
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).