Installation of a Gree (Inverter R32) wall-mounted heat pump in Rosemont–La Petite-Patrie
AirGreen installs a Gree Inverter R32 wall-mounted heat pump in Montreal (Rosemont–La Petite-Patrie). Careful HVAC installation, services in Montreal, Laval, Longueuil, North Shore, and South Shore. Reliable comfort and energy savings.
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 precise and careful HVAC installation for four-season comfort in an urban environment
At AirGreen , we have just completed the installation of a Gree wall-mounted heat pump in a duplex in Rosemont–La Petite-Patrie (Montreal) . The project perfectly illustrates our approach to working in a dense residential environment: rapid intervention, discreet integration on the facade , respect for service distances and optimization of heating and cooling performance . The result: a reliable, quiet and efficient system, designed for Montreal winters and humid summers.
Client context and objectives
The owner wanted:
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Replace a window air conditioner with a reversible solution capable of providing supplemental heating in the fall and spring.
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Reduce your electricity consumption with a high-efficiency inverter compressor.
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Preserve the aesthetics of the courtyard and minimize noise for the immediate neighborhood.
After a thermal assessment of the main rooms and a technical visit, we recommended a single-zone Gree wall-mounted heat pump , operating with R32 refrigerant , renowned for its good efficiency/reliability ratio and its resistance to cold.
Installation details: precision, silence and durability
Exterior installation on wall brackets
The outdoor unit is mounted on sturdy wall brackets , equipped with anti-vibration pads . This configuration:
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Raise the device for sufficient ground clearance in winter (snow, ice).
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Limits the transmission of vibrations to the masonry.
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Facilitates maintenance and rear clearance for optimal ventilation.
Secure electrical management
In the immediate vicinity of the device, we have positioned a code-compliant disconnect box (safety switch). The sheathed wiring follows a neat vertical route to the power point, with a service loop to avoid any mechanical stress and facilitate future work.
Short, insulated refrigerant lines
The insulated copper lines take a direct route (≈ 2 to 3 m) between the outdoor unit and the indoor head, in order to:
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Reduce heat loss and maximize seasonal efficiency.
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Limit refrigerant volume and simplify leak checks.
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Provide a clean aesthetic thanks to a perfectly closed white UV cover , silicone seals at the crossings and spaced collars for a lasting hold.
Condensate drainage by gravity
The condensate drain is routed by gravity , without a pump, to increase reliability. A continuous slope is checked with a level, and the outlet is protected against backdraft and freezing.
Respect for existing elements on the facade
The facade already had air outlet caps (dryer/air exchanger). We organized the installation of the outdoor unit in such a way as to preserve the required clearances , avoid recirculation and maintain access to this equipment, while aligning the covers for a harmonious visual reading.
Technical choice: the safe bet of a Gree Inverter with R32
Opting for a Gree Inverter with R32 addresses several challenges for Montreal households:
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High seasonal efficiency in air conditioning and good maintenance of heating capacity at low temperatures.
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R32 refrigerant with lower GWP than R410A, contributing to a more responsible environmental balance.
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Quiet operation , thanks to a modulating fan and compressor that adjust finely to the load.
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Simplified HVAC maintenance with accessible components and clear diagnostics.
For a duplex or condo type home, this translates into stable comfort , fewer sudden starts/stops and an optimized electricity bill over the year.
Key stages of the construction site: from technical visit to commissioning
1) Taking measurements and validating the holes
We validate the exact position of the interior head , the wall crossing (diameter, slope), the proximity of the electrical panel and the location of the disconnection box . This preparation limits unforeseen events, reduces the duration of the work and avoids rework .
2) Drilling and protection
The drilling is carried out with a controlled outward inclination , a watertight bulkhead and a sleeve to protect the connections. A UV- and frost-resistant exterior sealant completes the seal.
3) Installation of the outdoor unit and alignments
Wall consoles are mechanically anchored to the structure. We check the level , ventilation clearances , blowing orientation with respect to obstacles and service distance for maintenance.
4) Brazing, vacuuming and checks
The joints are silver-brazed when required, then we perform a high vacuum with a micron gauge to ensure the absence of moisture and air. A leak test and torque check complete the procedure.
5) Power-up and functional tests
After electrical connection and calibration , we test both modes (cold/heat), check blowing temperatures , intensities , noise and drainage . The customer receives the operating instructions and maintenance intervals .
Result: immediate comfort, preserved aesthetics, performance as expected
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In summer, the target room quickly reaches the setpoint, without unpleasant drafts, thanks to Inverter modulation .
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In mid-season and in moderate cold, the heating function reduces the use of baseboards, which reduces the bill .
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The facade remains orderly , the noise level is contained, and access for maintenance remains easy.
HVAC Maintenance Tips for Maximum Longevity
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Clean the inner head filters every 4 to 8 weeks during periods of heavy use.
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Clear 50 to 60 cm around the outdoor unit for good air intake.
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Check the drain at each change of season to avoid overflows.
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Annual inspection by our technicians: electrical checks, pressure/load, condition of the insulation, tightening of connections, and washing of the exchangers.
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In winter, after a snowfall, clear the snow from under the unit (if necessary) to preserve airflow.
Grants and local compliance
High-efficiency wall-mounted heat pumps are generally eligible for assistance programs in effect in Quebec. We assist our clients in preparing files , maintaining AHRI numbers , and verifying performance criteria (cold weather heating, seasonal efficiency). Our team also ensures electrical compliance and municipal requirements specific to Montreal and the cities of the North and South Shores .
Why AirGreen for your installation in Montreal, Laval and Longueuil
Our strength lies in:
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Field expertise on flat roofs, wooden facades, bricks, cladding and complex configurations.
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Standardized, documented and controlled HVAC installations (commissioning checklists).
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Accessible after-sales service, with parts and warranties managed efficiently.
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Clear planning : precise quote, choice of BTU rating , management of cable glands , and deadlines met.
Whether you are in Montreal , Laval , Longueuil , on the North Shore or the South Shore , we offer a heat pump solution adapted to your building, with a clean finish and measurable performance.
Summary technical sheet (for information purposes only)
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Type : single-zone wall-mounted heat pump (reversible wall-mounted air conditioner ).
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Brand : Gree .
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Technology : Inverter , R32 refrigerant.
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Outdoor installation : wall consoles with anti-vibration pads, standardized clearances.
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Connections : short (≈ 2–3 m), white UV cover, careful sealing.
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Power : nearby disconnect box, ducted wiring, service loop.
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Condensates : gravity with continuous slope.
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Noise : low at nominal load, benefit from Inverter modulation.
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Maintenance : regular filters + annual inspection recommended.
Conclusion
This Gree wall-mounted heat pump installation in Rosemont–La Petite-Patrie embodies our commitment: clean work , consistent performance , and support that simplifies the homeowner's life. Are you looking for a durable HVAC installation adapted to Montreal 's climate? We are ready to advise you, from BTU selection to commissioning and maintenance.
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.
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.
And 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.
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.
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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?
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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).