Installation of a GREE EXTREME R32 wall-mounted heat pump in Dollard-des-Ormeaux: R32 mini split installed on an elevated outdoor bracket
AirGreen installs a GREE EXTREME R32 wall-mounted heat pump in Dollard-des-Ormeaux: R32 mini split on an elevated bracket, performance, clean finish, and local HVAC expertise.
Take a tour of the installation
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.
A careful HVAC installation in Dollard-des-Ormeaux, designed for performance, access, and durability
In Dollard-des-Ormeaux, on the island of Montreal, AirGreen carried out the installation of a GREE EXTREME R32 wall heat pump, a mini split system designed to offer excellent performance in both cooling and heating, while fitting neatly into a restricted outdoor environment. This project perfectly illustrates a type of intervention we often carry out in the West Island: an HVAC installation where the quality of positioning, clearance management, outdoor unit protection, and overall aesthetics are as important as the choice of the machine.
In this specific case, the outdoor unit was installed on a raised metal support, directly on a flat outdoor surface. This choice is not only aesthetic: it keeps the condenser above the level of snow, water, and debris accumulation, while facilitating access for future HVAC maintenance. The nearby blue wall, the opaque guardrail, and the tight space configuration required precise installation, with particular attention paid to airflow around the unit.
The GREE EXTREME R32 is a single-zone wall heat pump offered in several capacities, including 9,000, 12,000, 18,000, and 24,000 BTU in the Canadian range. The technical data for the EXTREME R32 series indicate cooling capacities ranging, depending on the model, from about 9,100 to 22,000 BTU/h, with efficiencies reaching up to 30.0 SEER2 and 11.2 HSPF2 depending on the selected capacity.
Why the GREE EXTREME R32 was suitable for this project
The client was looking for a solution capable of ensuring stable comfort, with a discreet, reliable machine well suited to the winter conditions of Greater Montreal. The GREE EXTREME R32 wall heat pump met this demand well thanks to several technical elements:
- R32 Refrigerant, newer than R410A and used in several new generations of wall systems.
- Inverter Technology, which modulates power instead of operating only in on/off mode.
- Wi-Fi Connectivity, convenient for adjusting the temperature remotely.
- Heating operation at very low temperatures, an important advantage in an area like Dollard-des-Ormeaux, where winters can require long heating periods.
- Good seasonal efficiency, allowing for reduced electrical consumption when the device is properly sized and installed.
The technical documentation for the series also indicates an operating range in heating that can go down to -30 °C and a cooling range up to 50 °C, depending on the usage conditions and the exact model. These features are particularly relevant for an installation in the Montréal area, where the same system must handle both summer heat spikes and long cold periods.
A compact outdoor location that required real precision
One of the most important elements of this installation in Dollard-des-Ormeaux was the positioning of the outdoor unit. The available space was not a large open side of the house, but rather a structured outdoor area, with an adjacent wall, a guardrail, and airflow to respect.
At AirGreen, we never install an outdoor unit “in the simplest way” without analyzing its immediate environment. A heat pump must breathe properly. A poorly placed condenser can lose efficiency, accumulate ice faster, vibrate more, or become harder to maintain. Here, our team paid special attention to three aspects:
Clearance around the condenser
The unit was placed to maintain sufficient space for air intake and exhaust. The front fan had to be able to expel air freely, without being too close to the guardrail. The sides of the device, especially the surface of the heat exchanger, also had to remain accessible and ventilated.
The height of the support
The elevated support protects the unit from the accumulation of snow, puddles, dead leaves, and dirt that can settle on an outdoor surface. In Montréal, Laval, Longueuil, on the North Shore and the South Shore, this approach is often preferable when a device is installed on a terrace, flat roof, slab, or exposed outdoor area.
Service access
A well-installed device must remain accessible. Refrigerant connections, the service panel, the electrical box, and inspection points must be reachable without dismantling a structure or moving the unit. This approach facilitates future inspections, seasonal cleanings, and quick diagnostics.
A clean installation, with a professional finish
The image of this installation shows a clean result: the outdoor unit is well aligned, stable, installed on a suitable support, and sufficiently elevated from the ground. This type of finish is essential for AirGreen because a HVAC installation is not limited to the machine's operation at first startup. It must also be clean, durable, safe, and easy to maintain.
The metal support was installed with a stable base, each foot properly positioned to distribute the load. This detail reduces the risk of vibration and protects the surface under the device. Poor stability can cause unwanted noise, premature wear, or gradual displacement of the unit after several freeze-thaw cycles.
The routing of refrigerant and electrical lines was also handled carefully. In this type of project, we must work with the existing structure, access constraints, the orientation of the indoor unit, and the distance between the two system components. The EXTREME R32 series allows, depending on capacity, a maximum pipe length of 40 m and a maximum elevation of 25 m, providing good flexibility in many residential or semi-commercial scenarios.
What this project teaches about a good wall-mounted heat pump installation
Choosing the model is never enough
A system like the GREE EXTREME R32 can offer excellent performance, but only if the installation is properly designed. The choice of BTU capacity must take into account the area, insulation, sun exposure, number of occupants, ceiling height, window type, and the building's thermal losses.
A common mistake is choosing a machine that is too powerful "to be sure." In reality, an oversized device can run cycles that are too short, dehumidify less effectively in summer, and create uneven comfort. Conversely, a machine that is too weak will run too long, with reduced efficiency during heat or cold peaks. Our role is therefore to recommend a wall-mounted heat pump that truly matches the space, not to sell the biggest possible device.
The outdoor positioning directly influences performance
On this project in Dollard-des-Ormeaux, the condenser was installed in a clean and structured location, but one that required good technical judgment. An outdoor unit should not be placed against a wall, enclosed in too tight a space, or placed directly in an area where snow accumulates. It must be able to exchange air efficiently.
A poorly ventilated installation can cause:
- a decrease in heating efficiency;
- an increase in electrical consumption;
- more frequent ice buildup;
- higher noise;
- a reduced compressor lifespan;
- avoidable service calls.
That is why AirGreen pays particular attention to clearances, supports, fan direction, and accessibility.
Subsidies must be validated before the final submission
Several customers from Montreal, Laval, Longueuil, the North Shore, and the South Shore ask us if their new heat pump can qualify for financial assistance. For wall systems, eligibility depends notably on the exact model, the AHRI number, the installation date, the type of building, and the conditions of the current program. Hydro-Québec provides an official search for efficient heat pumps eligible for the LogisVert program.
For the GREE EXTREME R32 series, the technical documents list distinct AHRI references according to capacities of 9,000, 12,000, 18,000, and 24,000 BTU. At AirGreen, we always verify the exact model before confirming eligibility to avoid any unpleasant surprises after installation.
An R32 machine well adapted to the new expectations of customers
The choice of a GREE EXTREME R32 heat pump fits a clear trend: customers want more efficient, quieter, better connected, and technologically cleaner systems. The R32 is used in several new ranges of wall air conditioners and mini splits, notably because it allows designing high-performance systems with a more modern approach to refrigerants.
In this project, the client benefited from a system capable of providing heating and air conditioning from a single wall-mounted unit. It is an interesting solution for houses, condos, home offices, extensions, apartments, or specific areas that need comfort independent of the existing central system.
The details that make the difference during installation
On site, a successful installation depends on a series of concrete decisions. For this project in Dollard-des-Ormeaux, our team applied several best practices:
Location check before installation
Before securing the outdoor unit, we confirmed the available space, fan orientation, access to the service panel, and possible routing of the lines. This step prevents improvised adjustments once the device is in place.
Installation on elevated support
The support allowed positioning the unit at a practical height, with good protection against outdoor conditions. This type of base is especially useful in the Montreal area, where snow and ice accumulation can impair the operation of poorly installed devices.
Compliant refrigerant connection
The refrigerant lines must be installed, insulated, tested, and vacuumed according to industry standards. Neglecting vacuuming or a poorly tightened connection can cause performance loss, refrigerant leaks, or compressor wear. At AirGreen, this step is handled rigorously by qualified technicians.
Drainage check
A wall air conditioner produces condensation in cooling mode. Drainage must be planned to avoid water backflow, stains, leaks, or poorly directed runoff. Even though the outdoor unit often draws attention, water management on the indoor side is just as important.
Start-up tests
Once the system is installed, we check the operation in cooling, heating, pressures, outlet temperatures, remote control response, and, when available, the Wi-Fi configuration. This final check allows the client to receive a system ready for use.
A comfortable solution for the West Island
In Dollard-des-Ormeaux, many properties have particular constraints: houses with extensions, condos with co-ownership rules, limited outdoor spaces, facades to preserve, terraces, flat roofs, or shared technical areas. This project shows how a wall-mounted heat pump can be installed neatly even when the space is not ideal from the start.
AirGreen regularly operates in the West Island and throughout Greater Montreal for this type of project. Our experience allows us to find tailored solutions without compromising performance. A well-chosen, well-positioned, and well-installed machine can transform the comfort of a room while remaining discreet in the outdoor environment.
Practical advice before installing a wall heat pump
For owners considering the installation of a GREE wall heat pump, here are some points to verify before making a decision:
- Check if the electrical panel can handle the new load.
- Choose a BTU capacity based on actual needs, not just on area size.
- Avoid overly confined outdoor locations.
- Plan for a support adapted to snow, drainage, and service access.
- Confirm condominium rules when the installation is in a condo.
- Request a subsidy eligibility check before installation.
- Entrust refrigeration work to a qualified company.
These elements may seem simple, but they often make the difference between an average installation and a durable one.
Why choose AirGreen for a GREE EXTREME R32 installation
AirGreen specializes in heat pump, wall air conditioner, mini split, multi-zone systems, and light residential or commercial HVAC solutions. Our team operates in Montreal, Laval, Longueuil, on the North Shore and the South Shore, with a focus on proper sizing, installation quality, and after-sales service.
For this project in Dollard-des-Ormeaux, our priority was clear: to install a high-performance GREE EXTREME R32 in a compact outdoor space, while maintaining a clean finish and easy maintenance access. The result is a stable, discreet, and well-thought-out installation, ready to provide comfort in both summer and winter.
The value of a good HVAC installation is seen in the details: a straight support, respected clearances, clean connections, a logical piping route, an accessible unit, and a well-informed client. This is exactly the approach we apply to every AirGreen project, whether in Dollard-des-Ormeaux, Montreal, Laval, Longueuil, the North Shore, or the South Shore.
The big day, step by step
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 would it look like 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.
Four mistakes we do not make
Flip each card to see what we do instead.
Your own project, step by step
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.
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.
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).