Project

Gree wall-mounted heat pump installation in Villeray–Saint-Michel–Parc-Extension

AirGreen installed a Gree wall-mounted heat pump in a Villeray–Saint-Michel–Parc-Extension plex, providing efficient air conditioning and heating, discreet integration into the brick facade, and energy savings for the owner.

By AirGreen Climatisation & Chauffage Admin6 min read
Gree wall-mounted heat pump installation in Villeray–Saint-Michel–Parc-Extension
Gree wall-mounted heat pump installation in Villeray–Saint-Michel–Parc-Extension
–chapters in this story
6 minreading time
–type of installation
2026year published
The tour

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.

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.

The job

In Villeray–Saint-Michel–Parc-Extension, brick duplexes line the streets, each with its own small wrought-iron balcony and shared backyard. In this project, our AirGreen team was tasked with modernizing the comfort of an apartment in a typical building in the area by installing a Gree wall-mounted heat pump.

The client wanted a solution that would respect the character of the brick facade while offering better temperature control, summer and winter, without multiplying window air conditioners or increasing the electricity bill.


The client's need: four-season comfort in a Montreal plex

Before our intervention, the apartment was heated primarily by electric baseboard heaters, without fixed air conditioning. The constraints were typical for this type of building:

  • Overheating in summer , especially in the west-facing living room.

  • Uneven warmth between rooms, with some areas being colder in winter.

  • It is impossible to leave window air conditioners permanently installed, due to noise, safety and aesthetic reasons.

The owner was therefore looking for a solution:

  • Compact and quiet;

  • Energy efficient to reduce overall consumption;

  • Discreet on the front facade, very visible from the street;

  • Adapted to Montreal's climate, with harsh winters and marked temperature variations.


The AirGreen solution: a high-efficiency Gree wall-mounted heat pump

After analyzing the premises and the building's configuration, we recommended the installation of a Gree wall-mounted, single-zone heat pump of approximately 12,000 BTU .

This type of appliance is perfectly suited to a Montreal duplex apartment:

  • Inverter technology : power is continuously adjusted according to actual demand, which improves comfort and reduces energy consumption.

  • Efficient heating mode : the Gree heat pump provides stable heat over a wide range of outdoor temperatures, reducing the use of electric baseboard heaters.

  • Precise air conditioning mode : the customer can aim for a constant temperature without the abrupt variations associated with on/off systems.

  • Quiet operation both inside and outside, an important point in a dense area like Villeray–Saint-Michel–Parc-Extension.


A neat outdoor installation on a brick facade

The photo shows the Gree outdoor unit installed on the rear/side facade, made of red brick, just below the metal balcony. We paid particular attention to both the existing structure and the overall aesthetics.

Wall brackets and height from the floor

The heat pump is mounted on galvanized wall brackets , securely anchored to the concrete portion of the foundation. This configuration:

  • Ensures optimal stability of the device;

  • Reduces vibrations and noise transmitted to the structure;

  • Keeps the unit clear of the ground , protected from snow, ice and water accumulation in the spring.

This height also facilitates maintenance operations (cleaning, inspection, electrical checks).

Management of clearances and air circulation

The Gree unit is positioned at a safe distance from surrounding elements: brick wall, wrought iron railing, downspout, and stairwell. This clearance all around the machine ensures:

  • Free air circulation to maximize the efficiency of the heat pump;

  • A reduction in the risk of recirculation of hot air in air conditioning mode and of cold air in heating mode;

  • A limitation of noise reflected towards the windows of the dwelling.

Integration with the facade and existing elements

We took advantage of the white downspout to discreetly integrate the refrigeration lines and wiring using a matching pipe cover. The result:

  • The pipes are protected from shocks, UV rays and frost ;

  • The installation remains visually harmonious , respecting the style of the plex;

  • The focus is more on the architecture of the building than on the machine.

The condensation drain was also designed to prevent drips onto the foundation and foot traffic areas, by directing water to a suitable location on the ground.


Interior: a discreet wall-mounted head unit in the living room

Inside, the Gree wall-mounted unit was installed in the main living area to optimize air distribution throughout the home. Our technicians:

  • Choose a clear central wall to allow airflow to distribute towards the living room, dining room and kitchen;

  • Drilled through the wall directly behind the indoor unit to shorten the refrigerant lines , which reduces losses and improves reliability;

  • Adjusted the installation height to ensure optimal air circulation without blowing directly on the occupants.

The customer thus benefits from immediate comfort, while maintaining a simple and functional interior layout.


Results for the client: comfort, savings, and increased property value

Since the Gree wall-mounted heat pump was installed, the homeowner has noticed several tangible benefits:

  • Significantly improved summer comfort : the temperature remains stable even during periods of intense heat.

  • More even heating during the shoulder seasons and a good part of the winter, which reduces the need for electric baseboard heaters.

  • Optimized electricity bill , thanks to the superior efficiency of a heat pump compared to electric heating alone.

  • Property value enhancement : an apartment equipped with a modern heat pump is perceived as more comfortable and more attractive on the rental market.


An installation compliant with Quebec HVAC standards

At AirGreen, we place great importance on safety and compliance:

  • Electrical connection carried out by a qualified professional, on a dedicated circuit with an appropriate circuit breaker;

  • Complete evacuation of the refrigeration lines before opening the valves, in order to eliminate moisture and air;

  • Pressure, heating and air conditioning tests, to validate the efficiency and tightness of the system;

  • Complete explanations to the customer on the operation of the remote control, the operating modes (heating, air conditioning, dehumidification, auto) and basic maintenance (cleaning the filters, clearing around the outdoor unit, etc.).

The owner now has a reliable, high-performing and guaranteed system, supported by the expertise of our AirGreen team.


Why choose AirGreen for your Gree heat pump in Montreal?

By entrusting this project to AirGreen, the client in Villeray–Saint-Michel–Parc-Extension benefited from:

  • From a personalized assessment of its situation (type of building, insulation, volume to be air-conditioned/heated);

  • Clear recommendations on the sizing and positioning of units;

  • A meticulous installation , respectful of the architecture of the plex and the neighborhood;

  • Human after-sales service , available for questions, adjustments and periodic maintenance.

Whether you are an owner-occupier or an investor in Greater Montreal, we can assist you in choosing and installing the Gree wall-mounted heat pump best suited to your situation.

The steps

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.

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

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.

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.

    Mistakes avoided

    Four mistakes we do not make

    Flip each card to see what we do instead.

    Going further

    Your own project, step by step

    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.
    At your place

    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.

    0 / 6 checked
    True or false

    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.

    2. You pick the capacity with a simple square-footage rule.

    3. A multi-zone connects several indoor heads to a single condenser.

    4. The disconnect can sit behind the patio furniture.

    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.

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    The on-site estimate is free and the quote follows within 24 hours.

    • RBQ licence5645-9605-01 · 15.8, 15.10, 16
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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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