Installation of a GREE (R-32) wall-mounted heat pump in Rosemont–La Petite-Patrie
GREE R-32 wall-mounted heat pump installation in Rosemont: raised support, anti-vibration pads, and careful capping . An efficient HVAC installation for sustainable heating and cooling in Greater Montreal.
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The article, chapter by chapter
The comfort of a Montreal duplex reinvented: a clean, elevated installation designed for winter — by AirGreen.
Why this installation stands out
In a typical Rosemont–La Petite-Patrie duplex, we installed a GREE wall-mounted heat pump ( R-32 refrigerant). The outdoor unit sits on a raised aluminum support with anti-vibration pads ; the white capping protects the refrigeration path and ensures a clean finish. The goal: to provide energy-efficient heating and precise air conditioning for the main living areas, while optimizing durability in the face of Greater Montreal winters.
Client context and needs
Four-season comfort in an urban space
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Montreal apartment with paved backyard and limited clearance on the wall side.
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Need a quiet device, reliable in cold weather and visually discreet.
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Priorities: energy efficiency , controlled operating costs, and rapid HVAC installation without major work.
Our AirGreen approach
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Thermal assessment (envelope, orientation, windows, occupancy habits).
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Conservative sizing to avoid oversizing (stable performance, fewer short cycles, better dehumidification in summer mode).
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Choice of a GREE R-32 model from the recent residential range , compatible with cold climates and suitable for a main area (living room + open kitchen or central floor).
The chosen equipment and its advantages
Why a GREE R-32 wall-mounted heat pump ?
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High seasonal efficiency and reduced carbon footprint thanks to R-32 (less load and better heat transfer than older R-410A).
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Inverter modulation : the device finely adjusts its capacity; stable comfort and savings.
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Winter heating mode designed for our conditions (efficient defrosting, condensate management, protected electronics).
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Simplified maintenance : clear access to filters and the exchanger; ideal for annual preventive HVAC maintenance .
Expected result: constant comfort, lower consumption compared to electric convectors alone, and precise air conditioning in summer.
Installation details that make the difference
Outdoor installation - durable and quiet
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Raised Aluminum Support : Raises the condenser above the snow line and splashes; facilitates drainage and service access.
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Visible anti-vibration pads under the anchors: reduction of transmissions to the ground and adjoining walls.
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Continuous white capping : UV and mechanical protection of refrigeration connections and the communication cable.
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Compact path (typically 3 to 6 m): lower pressure losses, better efficiency and neat aesthetics.
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Clearances respected for condenser ventilation and service access.
Interior integration - cleanliness and efficiency
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Single, sealed and insulated perforation (vapor barrier and weather shield).
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Gravity slope provided for condensate drainage on the interior side when possible; otherwise, dedicated discreet pump.
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Proper electrical connection with external disconnect switch near the unit, on a dedicated circuit — safety and compliance with the Code.
AirGreen Quality: Method and Controls
Commissioning Checklist
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Deep vacuum (target ≤ 300 microns) to ensure the absence of moisture and non-condensables.
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Leak test (pressure gauges + foaming solution on flared fittings).
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Checking currents and polarity ; Inverter modulation test.
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Performance measurements (ΔT in cold/heat mode, blowing temperatures) and series recording for the customer file.
Finishing
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Clamps at key points, bending radii respected for copper tubes, continuous insulation without bridges.
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Explanation to the customer: modes, eco-settings, programming, filter cleaning, winter clearance instructions.
Operating tips to maximize savings
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Smart supplemental heating : Let the heat pump run continuously at low speed; it is most efficient this way.
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Summer: Target 23–24°C with dehumidification ; long cycles improve comfort.
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Winter: Keep the area in front of the condenser clear of snow for 1 m in front and 30 cm laterally.
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HVAC Maintenance : Filter cleaning every 4–8 weeks in season; annual AirGreen visit (electrical inspection, coil, fan, condensate, parameter updates).
Common Mistakes…and How We Avoid Them
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Oversizing : noisier, less comfortable, less energy efficient. Our load calculation avoids this pitfall.
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Condenser too low : risk of icing and snow being sucked in. Here, the high support protects the unit.
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Poorly insulated connections : losses and condensation. We install continuous, waterproof insulation .
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Discontinuous capping : UV and mechanical shocks damage the connections. Our route is protected from end to end .
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Poorly designed drain : water backs up when thawing. We prefer gravity or a properly heated and insulated pump.
Deadlines and organization of the worksite
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Technical visit : 30–60 minutes for surveys, location selection and options.
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HVAC installation : generally one day for one area; less disruption, site left clean at the end of the intervention.
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Commissioning : testing, configuration, user training and submission of the file (serial numbers, technical photos, advice).
Grants and eligibility (according to current programs)
Many recent R-32 wall-mounted heat pumps with high seasonal efficiency may be eligible for certain provincial/municipal programs. We verify your eligibility upon submission and prepare the required documents. This GREE installation meets the best practices sought (efficiency, careful installation, snow clearance).
Results for the client
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Stable comfort in winter and summer, without drafts.
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Lower electricity costs compared to resistive heating alone.
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Reduced noise level , both indoors and in the courtyard.
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Aesthetics respected: discreet capping, aligned condenser, clean fixings.
When to choose an R-32 wall-mounted GREE?
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Condo, duplex or house with main area to be air conditioned/heated.
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Controlled budget with serious returns and recognized reliability .
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Need a quick-to-install solution without existing ductwork.
AirGreen Tip : For multi-room homes, we also offer GREE R-32 MultiZone systems or combinations with cassette or ducted ducts depending on the architecture. We size each head to avoid comfort imbalances.
HVAC Maintenance: Recommended Schedule
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At seasonal changes : cleaning filters, visual inspection of the capping and support.
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Annual (by our technicians):
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Cleaning indoor/outdoor coils.
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Checking the currents and the inverter.
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Checking the fittings and insulation.
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Defrost and drain test.
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Updated comfort settings.
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What you get with AirGreen
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A local team that knows the realities of Montreal, Laval, Longueuil, North Shore and South Shore .
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Unbiased advice on power (BTU), number of zones and integration options.
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A certified, clean, documented installation — ready for years of service.
In short
This GREE R-32 wall-mounted heat pump installation, installed on a raised support with anti-vibration and integral capping , offers the customer four-season comfort and real efficiency , perfectly adapted to the requirements of 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).