Installation of a Gree wall-mounted heat pump in Rosemont–La Petite-Patrie
AirGreen installs a Gree R-32 wall-mounted heat pump in Rosemont–La Petite-Patrie: short rear opening, gravity drain, discreet finish and high efficiency. Professional HVAC installation for Montreal, Laval, Longueuil, North Shore and South Shore.
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.
Project context and comfort objectives
In a typical Rosemont–La Petite-Patrie apartment, our client wanted to improve the comfort of the living areas while limiting the visual impact of the equipment. We proposed a latest-generation Gree wall-mounted heat pump with R-32 refrigerant , sized to quickly cool during heat waves and efficiently heat during the inter-seasons. The specifications: low noise, even air diffusion in the open area, clean and fast HVAC installation , and simplified maintenance.
Choosing an interior location: height, airflow, access
The interior head is placed high up, on the ceiling side , a few centimeters from a wall corner and close to a patio door. This position has several advantages:
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Optimized air diffusion : the motorized shutter sends the flow along the ceiling to mix the air without direct air currents on the occupants.
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Easy access for HVAC maintenance : the front cover opens wide for cleaning the filters and evaporator.
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Neat aesthetics : compact white case, perfectly aligned, without protrusions or visible accessories.
We always recommend avoiding obstacles (thick curtains, ceiling drops, columns) within 1 m of the blower. Here, the volume is clear, ideal for the wall-mounted heat pump .
Technical route: short drilling, gravity drain and protected refrigeration lines
In this courtyard-side brick plex, we are making a direct hole at the back of the head . Key points:
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Refrigeration lines : ultra-short path to the outside, reducing pressure losses and improving seasonal efficiency.
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Gravity condensates : continuous slope towards the outside, which avoids the use of a pump and therefore reduces noise, maintenance and risk of breakdown.
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Minimal capping : no visible ducting inside; outside, the connections are sheathed and insulated , fixed properly and sealed around the perimeter of the hole (mastic + weatherstripping).
This type of configuration is exemplary for Montreal apartments overlooking a brick courtyard: discreet, efficient and durable.
Power supply and compliance
We install a dedicated circuit breaker for the panel, wiring that complies with the Quebec Electrical Code , and an external disconnect switch near the condenser (out of view in the photo). Our AirGreen teams are trained in RBQ requirements and good sealing and electrical safety practices. The result: a safe system, well protected against the elements and easy to isolate during maintenance.
Why Gree at R-32 for this project
The Gree brand is known for its quiet wall-mounted heads, fine modulation of inverter compressor, and a wide R-32 range (Vita, Clivia, Airy, Vireo, etc.). Without imposing a reference when the label is not visible, we are choosing here a Gree R-32 wall-mounted model with the following characteristics:
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High seasonal efficiency (SEER/SCOP competitive) thanks to R-32 refrigerant and modulation.
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Reduced noise : very quiet low-speed operation, ideal for bedrooms/living rooms.
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Useful low-temperature heating : reliable performance up to the usual Montreal off-season cold.
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Washable filters and quick access to components for HVAC maintenance .
In practice, this combination provides an excellent comfort/consumption ratio in an average-sized urban dwelling.
Sizing and result obtained
We size each heat pump according to:
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the usable surface area and the free height,
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the orientation of the glazing and the sunlight,
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insulation (brick walls, windows),
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the open plan layout.
Here, the sensible air conditioning load is moderate and the need for supplementary heating in the off-season is a priority. The choice of an R-32 wall unit is the perfect solution: rapid increase in comfort in summer, stable and economical maintenance in spring/autumn, with contained electricity consumption .
Installation details taken care of by AirGreen
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External support (not visible) placed on galvanized brackets or slab depending on the facade constraints.
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Controlled vibrations : anti-vibration pads and controlled tightening torque.
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Waterproofing : cable glands, butyl tapes and mastic to protect the building envelope.
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Testing and commissioning : vacuum drawing, leak testing, refrigerant charger checked, and verification of blowing temperatures .
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Finish : aligned wiring and insulation, UV fasteners, straight and discreet exterior trunking .
Usage tips to maximize comfort
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Auto/Heat/Cool mode : favor a stable mode rather than frequent back and forth, in order to exploit the inverter modulation.
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Reasonable guideline : in summer, aim for 23–24°C; in winter, 21–22°C depending on how you feel.
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Shutter : point slightly towards the ceiling to promote air mixing and avoid direct airflow.
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Open doors : in an open area, leave the circulation areas clear to distribute air to adjacent rooms.
HVAC Maintenance: Simple but Essential
Annual maintenance preserves performance and longevity:
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Clean filters every 4–6 weeks during peak season.
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Inspection of the evaporator and fan, disinfection of the condensate tray.
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Checking the disconnector , line insulation and gravity drainage.
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Check the outdoor condenser: fins clean, clear of leaves/snow, free space at the outlet.
AirGreen offers maintenance plans tailored to residences in Montreal, Laval, Longueuil, North Shore and South Shore .
Grants and energy compliance
Well-rated R-32 wall-mounted heat pumps may be eligible for certain support programs when performance and installation criteria are met. We guide you through the selection of certified models , required documentation, and up-to-date procedures for homeowners in the greater Montreal area.
What the installation changes for the customer's daily life
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Immediate comfort in the open area, without over-air conditioning.
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Quiet : At night, the unit operates at an imperceptible low speed.
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Bills under control : modulation avoids consumption peaks.
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Aesthetics : the Gree unit blends into the decor, with no visible cable ducts inside.
Why entrust your project to AirGreen?
At AirGreen , we deliver HVAC systems tailored to Montreal architecture: plexes, condos, townhouses. Our teams:
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evaluate the thermal load and the blowing strategy ,
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plan short routes (better efficiency ),
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work cleanly and quickly ,
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provide responsive after-sales service (maintenance, diagnostics, parts).
Whether you are in Montreal , Laval , Longueuil , on the North Shore or the South Shore , we understand local constraints (brick facades, walkways, alleys, flat roofs) and deliver durable systems.
Technical points to remember
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Type : Gree R-32 wall-mounted heat pump .
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Installation : head high up near the ceiling, direct rear drilling, gravity drain .
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Benefits : high seasonal efficiency, low noise, easy maintenance, sleek aesthetics.
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Best practices : short lines, careful sealing, external disconnector, vacuum test and temperature checks.
Are you considering a wall-mounted heat pump for your home in Rosemont , Villeray , Hochelaga , Laval , or the South Shore ? AirGreen can help you with advice , installation , maintenance , and grant monitoring. Let's discuss your project and find the most efficient configuration for your space.
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).