Project

Installation of a Gree wall-mounted heat pump in Southwest Montreal

In a condo undergoing renovation in the Southwest, we installed a Gree wall-mounted heat pump on a central wall in the open-concept kitchen-living room. The result: a discreet, quiet, and highly efficient system for heating and cooling the main living area year-round, without compromising the contemporary design of the space.

By AirGreen Climatisation & Chauffage Admin5 min read
Installation of a Gree wall-mounted heat pump in Southwest Montreal
Installation of a Gree wall-mounted heat pump in Southwest Montreal
Generic diagram: wall-mounted heat pump, indoor and outdoor units

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.

  1. 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.

  2. The refrigerant lines, the communication cable and the drain go through the wall in a single opening, sealed against water, cold air and insects.

  3. Two insulated copper pipes connect the two units. Outside, a line cover can protect them from sun, knocks and weather.

  4. A shut-off switch near the outdoor unit isolates it safely for service. It must stay accessible at all times.

  5. The compressor and the fan. In heating mode it captures heat from the outdoor air, even in winter, and moves it inside.

  6. On the ground or on the wall, it keeps the unit above accumulated snow. The unit stays clear and defrost water can drain away.

  7. The fan needs to blow freely. Storage, a fence or a wall too close, and efficiency drops while noise goes up.

In this modern condo in Southwest Montreal , nearing completion, the owners wanted a high-performance heating and cooling solution that seamlessly integrated with their new décor. The main living area is an open-concept kitchen and living room with smooth ceilings, recessed LED lighting, and contemporary dark furnishings.

To meet these requirements for comfort and aesthetics, we installed a high-efficiency Gree wall-mounted heat pump , designed to offer four-season comfort while blending discreetly into the decor.


An open-plan space with demanding needs

Open areas like this one always present the same challenge:

  • large volumes to be air-conditioned;

  • multiple heat sources (kitchen, appliances, large windows);

  • a need for a uniform temperature, without excessively hot areas or drafts.

The homeowners wanted to be able to enjoy their kitchen and living room year-round, without excessive noise or large, visible appliances that would disrupt the clean aesthetic of the space. A Gree wall-mounted heat pump was the ideal solution.


A perfectly sized Gree wall-mounted heat pump

We opted for a new-generation Gree wall-mounted unit , approximately 12,000 BTU, equipped with inverter technology. This type of heat pump:

  • continuously modulates its power according to the actual needs of the room;

  • maintains a stable temperature without sudden variations;

  • reduces electricity consumption compared to a traditional air conditioner or electric baseboard heaters used alone;

  • ensures a very low noise level, particularly appreciated in an open area where people cook, work and entertain guests.

Thanks to this heat pump, the main area of ​​the condo now benefits from efficient air conditioning and heating, without oversizing or loss of performance.


Strategic positioning on a central partition

The photo shows the Gree indoor unit mounted high up in the center of a clear white wall. This positioning was carefully chosen:

  • The high ceilings allow the blown air to be widely distributed in the living room and towards the kitchen.

  • The central position provides uniform diffusion, avoiding areas that are too cold near the unit and areas that are too hot at the periphery.

  • The chosen wall is clear of any obstruction (cabinets, television, structural column), which ensures optimal airflow.

The technical openings, located above the unit, allow the refrigeration lines, communication cabling, and power supply to be routed directly to the rear of the wall, minimizing visible conduits. Once finished, the overall result will be very clean and streamlined.


Integration into a contemporary design

One of the main objectives of this Southwest project was to integrate the heat pump into the interior design :

  • The Gree wall unit, white with rounded lines, blends into the wall and interacts well with the smooth ceiling and recessed LEDs.

  • The choice of wall and installation height make it minimally intrusive in the field of vision, while remaining easily accessible for filter maintenance.

  • No furniture or television is placed under the unit, which avoids conflicts between comfort and layout.

The result: a high-performance HVAC system, but visually discreet, perfectly in line with the minimalist style of the black kitchen and modern finishes.


Four-season comfort in Montreal's climate

With this Gree wall-mounted heat pump , the occupants now benefit from:

  • In summer , rapid air conditioning of the open area, even during the heat waves and humidity typical of Montreal;

  • In spring and autumn , gentle and constant heating is ideal for avoiding the need to start up more energy-intensive backup systems;

  • In winter , it provides support to the main heating system, which helps to stabilize the temperature in the central living area and reduce the electricity bill.

Humidity management, integrated filtration and the different modes (night, eco, dehumidification) also significantly improve air quality and daily comfort.


AirGreen support in the Southwest

In this project, our role was not limited to establishing a unified structure:

  • We analyzed the volumes and orientation of the open area to propose the correct BTU capacity;

  • We advised on the optimal positioning of the Gree wall-mounted head according to the future layout;

  • We coordinated the dedicated power supply and the routing of connections to the outdoor unit;

  • We have adjusted the commissioning to ensure quiet operation and maximum performance.

Whether you are in the middle of a condo renovation in the Southwest or elsewhere in Greater Montreal, we can guide you to the best Gree solution for your project.


Conclusion: a Gree heat pump that's easy to forget... except for its comfort.

This Gree wall-mounted heat pump installation in Southwest Montreal perfectly illustrates what we love to achieve: a residential HVAC system that is efficient, economical, and seamlessly integrated into the aesthetics of a contemporary interior. The unit blends into the decor, but its impact is felt at every moment: stable temperature, healthier air, and year-round comfort in the main living area.

If you are planning a renovation or the fitting out of a condo in the Southwest or elsewhere in the region, our team is here to design and install a Gree solution tailored to your space and lifestyle.

The steps

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.

Step 1 of 9The on-site estimate

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.

  1. 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.
  2. The quoteModel, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
  3. Getting readyFloors and furniture protected, wall plate position marked level, wall opening located.
  4. The wall openingA single opening, with the slope the drain needs to flow outside.
  5. The outdoor unitSet on a stand raised above the snow, with the clearances the manufacturer requires.
  6. Lines, cable and drainConnected, insulated and protected. The opening is then sealed against water, cold air and insects.
  7. The electrical workA dedicated circuit and an accessible disconnect near the outdoor unit.
  8. Tests and start-upLeak test, vacuum, then start-up and a check of heating and cooling.
  9. The walkthroughRemote, modes, filters: we show you the essentials before we leave.
Your numbers

And at your place?

Two quick checks with real numbers: what heat costs, and what your current heaters add up to in BTU/h.

Size checkYour baseboards, in BTU/h
–BTU/h of installed electric heat

    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.

    Through the seasons

    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.
    And at your place?

    Which type of equipment for your project?

    Pick what looks like your need.

    Mistakes avoided

    Four mistakes we do not make

    Flip each card to see what we do instead.

    Frequently asked questions

    What people ask us about this kind of work

    12 questions
    Does a wall-mounted heat pump heat in winter?
    Yes, it heats and cools. Its capacity drops in very cold weather; the operating range depends on the model and is listed on its spec sheet.
    Wall-mounted or multi-zone: how do I choose?
    One wall head and one condenser outside: the direct solution for a room or an open area. For two to five rooms, a multi-zone puts one head in each room on a single condenser.
    Where does the outdoor unit go?
    Where it stays above the snow, clear and accessible, away from walkways. We decide it with you during the estimate.
    Are there grants?
    Depending on the model and your situation, assistance programs may apply, including Hydro-Québec's LogisVert. AirGreen checks the model number before quoting an amount. See the grants.
    Do I need a permit?
    Rules vary from city to city: location, distances, noise. See permits and by-laws, and we check for your address.
    How cold can it heat?
    It depends on the model. According to Hydro-Québec, newer models work down to a temperature between −15 °C and −25 °C, and some cold-climate models are certified lower. The minimum temperature is on each unit's spec sheet.
    How much can I save?
    Hydro-Québec says a heat pump can be up to three times more efficient than baseboards for heating in the colder months. The result depends on the house, the climate and how it is used.
    How is the LogisVert assistance calculated?
    For ENERGY STAR cold-climate certified heat pumps, Hydro-Québec lists assistance of $120 per 1,000 BTU/h of heating capacity at −8 °C. AirGreen checks the exact model before quoting an amount; only Hydro-Québec confirms the assistance granted. See the grants.
    Is it noisy?
    The sound level depends on the model and is listed in decibels on each unit's spec sheet. Location matters too: when possible, we avoid putting the outdoor unit under a bedroom window.
    The outdoor unit is covered in ice: is that normal?
    Some frost is: the unit runs defrost cycles. Never hit the ice. If the unit stays iced up or stops heating, call us.
    Does AirGreen hold the required licences?
    Yes. AirGreen holds RBQ licence 5645-9605-01, subclasses 15.8 Ventilation, 15.10 Refrigeration and 16 Electricity.
    Is the estimate free?
    Yes. The on-site estimate is free and the quote follows within 24 hours. Book my free estimate.
    Going further

    Useful pages for what comes next

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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).

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