Job sheet · Project

Installation of a Gree wall-mounted heat pump in Rosemont–La Petite-Patrie

Discover how AirGreen installed a Gree Lomo+ R32 wall-mounted heat pump in a Rosemont–La Petite-Patrie home. A quiet, economical, and discreet system, it provides summer air conditioning and efficient winter heating, while increasing comfort and property value.

By AirGreen Climatisation & Chauffage Admin5 min read
City
Region
Equipment
Brand
Challenges
Published
–chapters, to open one by one
5 minto read the whole story
–type of installation
2026year published
At a glance

The job on one screen

Installation of a Gree wall-mounted heat pump in Rosemont–La Petite-Patrie
Installation of a Gree wall-mounted heat pump in Rosemont–La Petite-Patrie
The full story

The article, chapter by chapter

In this bright apartment in Rosemont–La Petite-Patrie, the owners wanted to improve their year-round comfort while reducing their electricity bill. They turned to us for the installation of a Gree wall-mounted heat pump , an ideal solution for typical apartments and houses in downtown Montreal.

An all-in-one comfort project

The room in question was a bedroom that tended to overheat in the summer and cool down quickly in the winter. The basic electric heating did the job… but at the cost of high energy consumption and inconsistent comfort.

Our recommendation: a Gree Lomo+ R32 12,000 BTU wall-mounted heat pump (a very common configuration for Gree in this type of space). This system allows for both:

  • to provide effective air conditioning during heat waves;

  • to heat in a stable and economical way during the Montreal winter;

  • to offer an excellent level of silence for a bedroom.

A compact and discreet wall unit

In the photo, you can see the Gree indoor unit installed high up, just below the ceiling, in the center of the wall. This positioning is not accidental:

  • It allows for uniform air distribution throughout the room;

  • It avoids direct airflow onto the occupants;

  • It frees up space for furniture and decoration.

The unit blends seamlessly into the white wall: clean lines, a uniform facade, and a discreetly integrated shutter. All power cables and refrigerant lines are concealed: no visible conduits on the interior, resulting in a clean and minimalist look , highly valued in modern condos and apartments in Rosemont.

On the right side, the unit is securely fixed to its mounting plate, which is anchored to the structure. This method ensures a durable hold and limits vibrations, contributing to the quiet operation of the heat pump.

The heart of the system: the Gree Lomo+ R32 heat pump

Gree is now one of the world's largest manufacturers of heat pumps. The Lomo+ R32 series is particularly popular for residential use in Quebec because it combines:

  • High energy efficiency (reduced consumption compared to electric baseboard heaters);

  • Use of R-32 refrigerant , which is more efficient and has a reduced environmental impact;

  • Reliable heating capacity in cold weather, well suited to the Montreal climate;

  • Very low noise level, both inside and outside.

In this project, the power output of approximately 12,000 BTU is ideal for a bedroom or a small open-plan living room. It allows for a rapid response to temperature increases while maintaining very reasonable energy consumption.

Technical details of the installation

Even though we only see the internal unity here, several important elements have been taken into account:

  • Drilling through the wall behind the wall head, towards the outside, to pass the refrigeration lines, the condensation drain and the electrical communication cable;

  • Drain management : adequate slope outwards to avoid any risk of water backing up into the unit;

  • Installation of the Gree outdoor compressor on a stable support (floor or wall), with vibration dampers;

  • Respect the clearances recommended by the manufacturer, both inside and outside, to optimize air circulation and performance.

Before commissioning, we always perform the following:

  1. Vacuuming the refrigeration circuit;

  2. Checking the electrical connections;

  3. Functional tests in heating and air conditioning mode;

  4. Explaining to the customer how to use the device (remote control, ECO modes, defrosting, programming, etc.).

Comfort in Rosemont–La Petite-Patrie, summer and winter

Thanks to this Gree wall-mounted heat pump, homeowners now benefit from:

  • Rapid cooling during heat waves;

  • Stable and comfortable heating in winter, with lower electricity consumption;

  • Very low noise level , essential in a bedroom;

  • Cleaner air, thanks to the integrated, easy-to-clean filters .

The heat pump operates in "heat pump" mode: it extracts heat from the outside air, even in cold weather, and transfers it inside. As a result, for every kilowatt consumed, it can provide several kilowatts of heat, representing a substantial saving compared to electric baseboard heaters.

An investment that increases the value of the property

In a desirable neighborhood like Rosemont–La Petite-Patrie, adding a Gree wall-mounted heat pump is an asset for:

  • To improve the daily comfort of occupants;

  • Reduce the energy bill;

  • Enhancing the property's value in the eyes of future buyers or tenants, who are increasingly looking for this type of equipment.

The neat aesthetics of the interior unit, perfectly integrated into the wall, contribute to giving an impression of recent renovation and well-maintained housing.

Why choose AirGreen for your Gree heat pump?

At AirGreen, we install and maintain Gree wall-mounted heat pumps throughout Greater Montreal: Rosemont–La Petite-Patrie, Villeray, Plateau-Mont-Royal, Laval, North Shore and South Shore.

By entrusting us with your project, you will benefit from:

  • Our technical expertise on Gree products and on the specific needs of the Quebec climate;

  • Comprehensive support, from choosing the power level to explaining the settings;

  • A professional, clean and safe installation that complies with electrical standards and manufacturer's recommendations;

  • A responsive after-sales service for maintenance, cleaning and warranty interventions.


Are you also considering installing a Gree wall-mounted heat pump in your apartment or house in Montreal?

We would be delighted to analyze your situation, offer you the appropriate power and provide you with an installation as meticulous as the one carried out in this Rosemont–La Petite-Patrie residence.


Your numbers

The job tools

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.

    The steps

    How the job unfolds

    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.
    The tour

    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.

    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.

    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
    Maintenance

    Good habits, once the unit is in place

    Six simple habits that keep the unit going. Your list stays on this device.

    0 / 6 checked
    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.
    For your project

    The right pages, at the right time

    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.

    Could this job help a neighbour?

    Share
    Similar projects

    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.

    All our projects

    Your project

    An on-site estimate, the right capacity, the right equipment.

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

    • RBQ licence5645-9605-01 · 15.8, 15.10, 16
    • EstimateOn site, free
    • QuoteWithin 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).

    Leave a comment