Installation of a GREE (R-32 range) wall-mounted heat pump in Rosemont–La Petite-Patrie
GREE wall-mounted heat pump (R-32) installed in Rosemont–La Petite-Patrie: overhead supports, white-covered connections, electrical disconnect, four-season comfort. AirGreen — HVAC installations in Montreal and surrounding areas.
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The job on one screen
The article, chapter by chapter
A neat project above a garage to maximize clearance and performance
At AirGreen , we have just installed a GREE wall-mounted heat pump (new R-32 range ) in a plex in Rosemont–La Petite-Patrie . The outdoor unit is mounted on sturdy wall brackets , at a good height above a garage door , which protects the equipment from winter projections, improves air circulation and facilitates maintenance. This type of installation is particularly recommended in Montreal's alleys, where space is limited and snow can accumulate quickly on the ground.
Why the GREE wall-mounted heat pump (R-32) here?
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High energy efficiency : GREE's latest R-32 generations offer better seasonal efficiencies and a reduced refrigerant charge compared to R-410A.
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Four-season comfort : air conditioning in summer, stable heating in the heart of Montreal winter.
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Low noise level : a large diameter fan and a well-ventilated casing limit turbulence and disturbances for the neighborhood.
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Simplified maintenance : The grille design and clearance around the unit allow for quick cleaning of the fins and easy access to the fittings.
In this configuration, we aim for an optimal balance between discretion, performance and durability , while respecting the structure of the building and the clearances recommended by the manufacturer.
Residence context and site constraints
The brick building has a garage overlooking the alley. The main constraints to be addressed:
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Reduced space at the rear : need to install the unit high up to free up the vehicle's maneuvering area and avoid impacts.
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Protection against snow and slush : raised on galvanized brackets anchored in the concrete sill, to avoid accumulations on the ground.
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Aesthetic and watertight routing of the connections: white covering of the refrigerant lines and the communication cable laid flush with the flashing under the window, with curvature radii respected to preserve the integrity of the copper tubes.
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Safe power supply : disconnect box positioned near the unit, depending on the direction of maintenance, and conduit sealed to prevent any infiltration.
Installation details and technical choices
Support and anchors
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Heavy-duty wall brackets with wide plates, fixed to the concrete of the sill using calibrated mechanical anchors.
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Anti-vibration pads under the chassis to limit the transmission of low frequencies to the adjoining wall and the garage floor.
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Level and plumb checked to ensure adequate condensate flow and correct oil flow to the compressor.
Refrigeration connections & capping
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Short, direct path from the inner head to the outer head, to reduce pressure losses and optimize efficiency.
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White PVC cladding to match the joinery; screwed sections and seals at penetration points.
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Each flare fitting is coupled with a torque meter during tightening, then checked with nitrogen leak testing and deep vacuum (< 500 microns) before opening the fluid.
Condensate management
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Gravity drainage preferred (no visible pump), controlled slope to avoid stagnation and freezing.
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Protected exit away from passageways to prevent droplets on the garage threshold.
Commissioning
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Intensity control and fan balancing at different levels.
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Setting of cold/heat/auto modes , and adjustment of eco settings for the night.
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Checking suction and blowing clearances ; no obstacles within 30–40 cm laterally and more in front, in accordance with GREE recommendations.
And on the interior side: targeted comfort, controlled noise
The wall-mounted fan head ( R-32 residential range) is positioned to sweep the main room and avoid direct blowing onto the occupants. The silent mode reduces the fan speed for evenings, while the vertical/horizontal sweep homogenizes the temperature. The customer benefits from precise control of the setpoints and a progressive start thanks to the inverter.
Result: comfort, savings and peace of mind
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Stable temperature throughout the year, with a rapid increase in comfort during heat waves.
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Lower energy bill compared to resistive electric convectors.
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Low noise footprint in the alley thanks to good vibration insulation and adequate clearance.
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Respected aesthetics : the capping follows the lines of the building and the color integrates with the woodwork.
Potential Grants and Eligibility
New generation R-32 wall-mounted heat pumps , when they meet performance criteria (efficient heating in cold weather, recognized certifications), may be eligible for assistance programs available in Greater Montreal. We validate on a case-by-case basis: Montreal, Laval, Longueuil, North Shore, South Shore . Our team assists the client in gathering proof of performance (technical data sheet, AHRI number) and submitting the required documents .
Best practices that we systematically apply
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Choice of supports according to the mass of the unit and exposure to wind; controlled tightening of the fixings.
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Sealing of crossings (closed-cell foam + sealant) to prevent thermal bridges and infiltration.
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Respected bending radii and continuous insulation of lines to limit losses and condensation.
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Electrical safety : dedicated circuit breaker, verified rating, and accessible external disconnection .
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End of construction documentation : parameters, serial numbers, first season advice and maintenance plan .
HVAC maintenance: maintaining performance over time
A quick annual maintenance is enough to keep the installation at its best level:
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Cleaning the filters and the interior evaporator.
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Gentle degreasing and straightening of the outdoor condenser fins if necessary.
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Checking the tightening torques , insulation and condition of the covers.
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Control of blown intensities and temperatures to confirm performance.
Our HVAC maintenance contracts cover these points and extend the life of the system while preserving the warranty.
Usage tips for the occupant
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In summer mode, program a setting of 23–24°C for a good comfort/energy compromise.
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Leave the unit running continuously on very hot evenings: the inverter manages the stages without overconsumption.
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In winter, clear the blowing area of any obstructions (bins, shovels, bicycles) to maintain a free flow of air.
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Do not turn off the power with the disconnection except for maintenance; use the remote control or the app.
Why AirGreen for your projects in Rosemont and throughout Greater Montreal?
We master the specificities of Montreal plexes , narrow alleys and brick facades: clean openings , discreet cappings , adapted supports and complete documentation for subsidies. Our team advises households in Montreal, Laval, Longueuil, North Shore and South Shore to choose the right capacity (9,000 to 24,000 BTU) , the appropriate R-32 range and the most efficient connection route .
Quick FAQ
Is this installation suitable for a garage/alley?
Yes, the installation at height on brackets protects the unit from shocks and snow, while maintaining clearances.
Condensate or gravity pump?
Here, gravity is sufficient; it is quieter and more reliable in winter.
Which exact model?
We select a GREE heat pump from the R-32 range corresponding to the thermal load of the home (9–24 k BTU). The technical data sheet and the AHRI number are given to the customer during commissioning.
What if I want to serve multiple rooms?
We can offer a MultiZone R-32 FreeMatch when multiple heads are required, with precise sizing for each zone.
Conclusion
This GREE (R-32) installation in Rosemont–La Petite-Patrie demonstrates that a well-designed wall-mounted heat pump — high supports , protected routing , secure electricity , and fine adjustments —offers comfort , silence , and savings all year round. At AirGreen , we combine technical excellence with attention to detail to deliver sustainable and aesthetic projects throughout Greater Montreal .
The job tools
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.
How the job unfolds
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.
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.
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.
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.
Good habits, once the unit is in place
Six simple habits that keep the unit going. Your list stays on this device.
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.
The right pages, at the right time
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.
During defrost cycles. That water must drain away without forming ice.
2. You pick the capacity with a simple square-footage rule.
Windows, insulation, orientation and how the room is used all count. Capacity is chosen on site.
3. A multi-zone connects several indoor heads to a single condenser.
One head per room, all on the same condenser. Each room keeps its own temperature.
4. The disconnect can sit behind the patio furniture.
It must stay accessible: it is what shuts the unit off for service.
0 / 4 right answers
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?
Where does the outdoor unit go?
Are there grants?
Do I need a permit?
How cold can it heat?
How much can I save?
How is the LogisVert assistance calculated?
Is it noisy?
The outdoor unit is covered in ice: is that normal?
Does AirGreen hold the required licences?
Is the estimate free?
No question matches. Write to us: we answer.
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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).