Installation of a Gree R-32 wall-mounted heat pump in Plateau-Mont-Royal
In Plateau-Mont-Royal , AirGreen installs a Gree R-32 wall-mounted heat pump : short path, vacuum < 500 microns , pressure test and gravity drain . Result: quiet comfort and savings. Serving 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.
A cool room in summer, comfortable in winter: discreet integration and high performance in a Plateau condo
Background and objectives
In a bright condo in Plateau-Mont-Royal , we are installing a new generation Gree R-32 wall-mounted heat pump to ensure four-season comfort in a room overlooking the tree-lined street. Our clients' priorities: silence , visual discretion , intelligent control and energy savings without compromising on air quality.
Why the Gree R-32 wall-mounted solution is essential here
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Type : wall-mounted heat pump (mini-split) with inverter compressor finely modulating the power.
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Brand : Gree , renowned for its robust electronic cards, its high fin density exchangers and its Wi-Fi compatibility.
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Refrigerant : R-32 , more efficient than R-410A and requiring a lower charge , which improves seasonal performance and facilitates maintenance.
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Capacity : Typical sizing of 9,000 to 12,000 BTU for an average enclosed room with good airtightness.
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Useful functions : discreet digital display on the front, night mode, automatic restart, washable filters, timer.
We are choosing Gree's R-32 range, which is perfectly suited to the needs of Montreal residential customers: efficient heating in mid-season and responsive air conditioning during heat waves.
Interior layout: simplicity and performance
The interior head is placed at the top of the wall , close to the ceiling, along a bay window equipped with a curtain rail. This position promotes:
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homogeneous diffusion thanks to horizontal/vertical scanning,
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avoiding air recycling (the probe does not immediately “reread” the blown air),
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easy access for HVAC maintenance (filter and coil cleaning).
We maintain manufacturer-specified clearances on the top, sides, and front of the unit. The mounting plate is anchored to a solid base; controlled tightening eliminates any whistling or unwanted vibration.
Route of the connections: short, clean and gravity-based
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Drilling : right rear, shortest towards the outside; sealing ring and sealant to prevent any infiltration of air or humidity.
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Condensate drain : gravity , with continuous slope (>1%) to ensure quiet and long-lasting flow — no pump is required.
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Estimated length : 2 to 4 m between the head and the external condenser, which limits pressure losses and the risk of refrigerant noise.
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External capping : UV-resistant white trunking , watertight elbows, stainless steel fixings for durability against freeze/thaw cycles.
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Power/communication : Cable sized to the rated current, routed in the same duct and oversized to reduce heating.
Exterior and support: stability and service
In the built environment of the Plateau-Mont-Royal , the outdoor unit is generally installed on galvanized wall brackets in the yard, or on a cushioned slab if space allows. Here, we favor:
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anti-vibration pad brackets ,
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clearances respected at the rear and front for optimal air exchange ,
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refrigeration connections accessible for future checks,
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cable routing designed for aesthetics and safety (no sagging, no water points).
If installed at height, we provide snow clearance and, if required, a retention tank with drainage.
AirGreen Methodology: Invisible but Essential Rigor
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Preparation of deoxidized copper tubes insulated with thick Armaflex , flared fittings with dynamometric tightening torque .
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Brazing under nitrogen in the workshop if necessary.
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Pressure test : raised to ~450 psi with dry nitrogen and held for a long time with pressure reading.
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High vacuum : < 500 microns measured with a digital vacuum gauge, stabilization level to detect micro-leaks and residual humidity.
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Commissioning : superheating/subcooling control, intensity measurement, drain and flow fault check, flap calibration to avoid blowing directly onto the bed.
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Finishing : fireproof sealing if necessary, aligned capping , screw covers, site cleaning.
Customer result: discreet comfort and simple control
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Quiet : low-speed internal fan and inverter compressor that adapts power; night mode is popular.
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Stable comfort : precise maintenance of the setpoint without overheating or overcooling.
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Savings : continuous modulation, programming via Wi-Fi , washable filters that maintain efficiency.
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Aesthetics : smooth front with discreet digital display ; no visible tubes inside .
Sizing: Avoiding Common Mistakes
For a closed room in the Plateau, 9,000 BTU is often suitable; 12,000 BTU is justified if:
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strong solar load (west-facing bay),
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light, poorly insulated walls ,
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desire to cover a partial clearance towards the corridor.
Oversizing results in short cycles , less stable comfort and more noise . We therefore carry out a load calculation (envelope, orientation, infiltration rate) before any recommendation.
HVAC Maintenance: Maintaining Performance Year After Year
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Quarterly cleaning of filters and dusting of the tangential fan .
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Annual inspection : tightening of connections, insulation test, checking of crawl space under the outdoor unit, clearance of leaves and snow.
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Hygiene : gentle treatment of the internal exchanger to limit biofilms and maintain air flow .
We offer maintenance plans for Montreal , Laval , Longueuil , the North Shore and the South Shore .
Technical details specific to this project
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Placed very high above the rod: the air stream flows under the ceiling then falls gently, which avoids direct air currents on the resting area.
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Rear exit : no visible chute inside, wall remained clean .
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Short route : minimized losses, preserved COP .
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Gravity drain : reliability and zero pump noise .
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Service access (right side) cleared for maintenance and measurements.
Grants and Eligibility
Several high-efficiency R-32 wall-mounted heat pumps may be eligible for programs in effect in Quebec, depending on the exact model , certified performance and related work (sealing, thermostats). Our team verifies eligibility , prepares documentation and advises to maximize return on investment .
AirGreen best practices for buildings in the Plateau
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Validation of the structure before anchoring (brick, blocks, wooden frame).
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Waterproof cable glands to prevent condensation and odor infiltration between dwellings.
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Noise management : pads, torque tightening, link trajectories without “harp”.
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Winter prevention : maintain clearance around the condenser; check gutters that may drip onto the unit.
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Smart control : use of time slots and night-time eco-setting .
What you gain with AirGreen
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Complete support : choice of capacity , location , and operating advice.
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Careful and measurable execution (pressurization, vacuum, functional tests).
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Local availability : rapid interventions in Montreal , Laval , Longueuil , North Shore and South Shore .
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Follow-up : HVAC maintenance reminders, optimization of settings after the first season.
Are you planning to install a wall-mounted heat pump in Plateau-Mont-Royal or elsewhere in Greater Montreal?
At AirGreen , we deliver clean, efficient and durable HVAC systems , with service that remains accessible long after commissioning.
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.
Which type of equipment for your project?
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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?
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?
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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).