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.