Installation of a Gree wall-mounted heat pump in a condo in Ville-Marie
Installation of a Gree wall-mounted heat pump in Ville-Marie. AirGreen offers comfort, connectivity, and HVAC performance in Greater Montreal.
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The job on one screen
The article, chapter by chapter
Tailor-made comfort in the heart of downtown Montreal
Living in a condo in downtown Ville-Marie requires combining comfort and privacy in a sometimes limited space. Installing a Gree wall-mounted heat pump is an ideal solution, offering performance, reliability, and modern connectivity, while respecting the constraints of a dense urban environment.
Client context and needs
Our client wanted to replace their old portable air conditioning system with a permanent, energy-efficient and quiet option. The main expectations were:
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Maintain a stable temperature in summer and winter,
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Reduce energy costs,
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Integrate a system compatible with home automation, thanks to the Gree heat pump's integrated Wi-Fi .
Technical details of the installed unit
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Brand: Gree
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Type: Wall-mounted heat pump (mini-split)
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Capacity: 12,000 BTU , suitable for an open room of approximately 35 m², including living room and dining room.
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Wi-Fi technology : remote control via mobile app, ideal for busy urban residents.
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Energy performance : High SEER2 seasonal efficiency, guaranteed operation down to -25°C.
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Compact and elegant design , perfectly integrated under the exposed concrete ceiling of the condo.
Technical challenges encountered
The installation presented two main constraints:
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Concrete ceiling limiting duct routing options.
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Limited space above the door , requiring precise positioning of the wall unit.
Solutions adopted by AirGreen
Our technicians proposed a suitable strategy:
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Strategic drilling of the wall, avoiding any damage to the structural elements of the concrete.
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Discreet routing of refrigerant and electrical connections via a minimalist duct, limiting visual impact.
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Optimized gravity drainage , avoiding the need for a lifting pump and reducing maintenance risks.
Results obtained
After installation, the customer immediately noticed:
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Uniform freshness throughout the living space,
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A reduction in electricity consumption , thanks to the high efficiency of the Inverter compressor,
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Increased flexibility with mobile control, allowing you to adjust the temperature remotely.
Why choose AirGreen for your HVAC installation in Montreal
At AirGreen, we understand that every condo and every client has unique needs. Our expertise in the HVAC sector in Montreal, Laval, Longueuil, the North Shore, and the South Shore allows us to offer customized solutions that comply with condominium standards and are adapted to the realities of urban buildings.
Our advantages:
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Personalized assessment of your needs,
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Compliance with construction and co-ownership standards ,
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Turnkey HVAC installation by certified technicians,
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Advice on available grants to maximize your savings.
Maintenance and durability
To ensure the longevity of your Gree heat pump, we recommend:
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Regular cleaning of the filters (every 2 to 3 months),
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A complete annual inspection carried out by AirGreen,
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A preventative maintenance plan to ensure optimal performance throughout the year.
Conclusion
The installation of this Gree wall-mounted heat pump in a Ville-Marie condo once again demonstrates AirGreen's ability to combine technical expertise with adapting to urban constraints. Thanks to this solution, the client now benefits from a reliable, quiet, connected, and energy-efficient system, perfectly suited to life in the heart of Montreal.
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).