Installation of a GREE CHARMO R32 Mini Split Wall-Mounted Heat Pump in Îles-Laval
In Îles-Laval, AirGreen installed a GREE CHARMO R32 wall-mounted heat pump with an outdoor unit on wall brackets, protected conduits, and a neat finish. An efficient, discreet, and durable HVAC solution.
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 compact and robust outdoor installation in a confined space in Îles-Laval
In Îles-Laval, our AirGreen team recently completed the installation of a GREE CHARMO R32 wall-mounted heat pump, a Mini Split solution designed to offer efficient air conditioning, effective auxiliary heating, and daily comfort in a residence where every installation detail needed careful consideration. This project perfectly illustrates the importance of a methodically executed HVAC installation, especially when the outdoor unit must be positioned in a limited space, near a foundation wall and with little ground clearance available.
In the photo of this installation, one immediately notices the care taken in positioning the outdoor unit. The GREE heat pump is installed on robust wall brackets, above ground level, which helps protect it against the accumulation of water, snow, ice, and debris. In an area like Laval, where freeze-thaw cycles can be frequent during winter, this type of mounting is particularly important for extending the system's lifespan and facilitating maintenance.
The choice of a wall-mounted installation rather than a ground pad was not made by chance. The available location presented several constraints: a narrow passage, proximity to the exterior wall, a dark foundation area that could retain moisture, and a need to keep the ground clear. Our team therefore opted for a solution that combines mechanical stability, accessibility, and equipment protection.
Why the GREE CHARMO R32 was suitable for this project
The GREE CHARMO R32 is a wall-mounted heat pump valued for its balance of energy efficiency, comfort, and ease of use. For this project in Îles-Laval, it perfectly met the client's expectations: efficient air conditioning during the summer, practical heating during cooler seasons, and improved overall comfort in the residence without undertaking major work.
The GREE CHARMO R32 model uses R32 refrigerant, which is increasingly common in new generations of residential HVAC systems. This refrigerant allows for excellent thermal performance while adopting a more modern approach to residential air conditioning and heating. For homeowners comparing different models of wall-mounted heat pumps in Laval, Montreal, Longueuil, on the North Shore or the South Shore, this type of technology represents a very relevant choice.
Among the advantages that guided AirGreen's recommendation:
- quiet operation;
- good cooling performance;
- practical heating for cold periods;
- Inverter technology for more stable modulation;
- compact outdoor unit format;
- compatibility with a discreet residential installation;
- relatively simple maintenance when installation is well planned.
In this residence, the client was mainly looking for a reliable, well-installed solution capable of maintaining constant comfort without cluttering the outdoor space. The GREE CHARMO R32 Mini Split perfectly met this need.
Wall-mounted installation to protect the outdoor unit
One of the most important aspects of this installation is the mounting of the outdoor unit on metal wall brackets. This method offers several concrete advantages.
Firstly, it elevates the unit above ground level. In winter, this reduces the risks associated with snow accumulation around the base of the appliance. In summer, it prevents leaves, dust, or debris from the ground from rapidly obstructing the area around the unit.
Secondly, wall-mounted installation facilitates maintenance. Our technicians can more easily access important components, check the general condition of the unit, clean the area around the fan, and inspect the refrigerant connections without having to work directly at ground level.
Finally, this type of mounting is ideal when space is limited. In Îles-Laval, many properties have narrow side passages or outdoor areas where traffic must not be impeded. By fixing the unit to the wall, we maintained a clearer and better organized environment.
The importance of clearance around the unit
Even if the outdoor unit appears compact, a wall-mounted heat pump needs adequate clearance to function properly. The fan must be able to exhaust air without obstruction, and the coils must remain accessible for maintenance.
During installation, we therefore checked:
- clearance in front of the fan;
- height relative to the ground;
- distance from the wall;
- accessibility to service panels;
- positioning of the electrical disconnect;
- the path of the refrigerant lines.
These checks are not just technical. They have a direct impact on the system's performance, noise level, and durability. A poorly positioned unit can lose efficiency, work harder, and become noisier over time.
Clean and safe electrical connection
In the image, the outdoor electrical box near the unit is also visible. This detail is essential. A residential HVAC installation must always include compliant, safe, and easily accessible electrical power for service operations.
At AirGreen, we pay particular attention to the positioning of the disconnect and the routing of cables. The goal is to ensure a clean, safe installation that complies with industry best practices.
In this project, the wiring was organized to avoid unnecessary strain on connections and maintain an orderly appearance near the unit. This type of finish is often overlooked, but it is an integral part of a professional installation.
Protected and well-aligned conduits
The vertical white gutter visible behind the outdoor unit protects the refrigerant lines and communication cabling between the indoor and outdoor units. This protection is particularly important in an installation exposed to the elements.
A poorly protected conduit can lead to several problems:
- premature wear of insulation;
- exposure to UV rays;
- water infiltration;
- aesthetic degradation;
- risks of mechanical damage.
In this installation in Îles-Laval, we ensured that the routing was straight, clean, and securely fixed. The white gutter integrates well with the exterior wall and gives the entire setup a neat finish.
What this installation concretely brings to the owner
Once commissioning is complete, the client benefits from a system better suited to their home's needs. The GREE CHARMO R32 effectively air conditions the main rooms during summer and provides comfortable heating during the cooler periods of spring and autumn.
More stable comfort thanks to Inverter technology
Inverter technology allows the heat pump to modulate its operation rather than simply starting and stopping at full capacity. This modulation provides more constant comfort, as the indoor temperature fluctuates less abruptly.
For the homeowner, this translates to:
- fewer temperature fluctuations;
- a more consistent feeling of comfort;
- quieter operation;
- better controlled consumption;
- fewer abrupt start-up cycles.
In a residence located in Laval, where temperature variations can be significant from one season to another, this stability represents a real daily advantage.
An interesting solution for reducing the use of electric baseboards
Many homeowners in Montreal, Laval, Longueuil, on the North Shore, and the South Shore seek to reduce their reliance on electric baseboards, especially during transition periods. A well-sized wall-mounted heat pump often allows efficient heating of certain areas of the house with more advantageous consumption than direct electric heating.
In this case, the GREE CHARMO R32 was chosen as the primary comfort solution for a targeted area of the residence. It allows the client to use wall heating more strategically, while retaining existing systems as needed backup.
Mistakes to avoid during a wall-mounted heat pump installation
This project in Îles-Laval clearly shows that the quality of an installation does not only depend on the choice of appliance. Several common mistakes can compromise the performance of a wall-mounted heat pump.
Installing the outdoor unit too close to the ground
A unit that is too low can be exposed to snow, water, leaves, and dirt. This can reduce efficiency and complicate maintenance.
Neglecting vibrations
Poorly chosen or poorly fixed supports can transmit vibrations to the wall. We use appropriate fastening methods to limit this risk.
Poorly protecting the lines
Refrigerant lines must be protected from the weather. A well-installed gutter contributes to durability and the final appearance.
Choosing inadequate capacity
A heat pump that is too small will work too hard. A heat pump that is too large can cycle too often. At AirGreen, we evaluate the area, insulation, sun exposure, room configuration, and usage habits before recommending a model.
Forgetting maintenance
Even an excellent HVAC system needs maintenance. Cleaning filters, inspecting the outdoor unit, and checking drainage are essential to maintaining performance.
Practical advice given to the client after installation
After each installation, we take the time to explain to the owner how to use their system efficiently. For this GREE CHARMO R32 installation in Îles-Laval, we particularly recommended:
- to regularly clean the indoor unit filters;
- to keep the space in front of the outdoor unit clear;
- to check for snow accumulation in winter;
- to avoid frequent and extreme temperature changes;
- to schedule periodic HVAC maintenance;
- to contact AirGreen quickly in case of unusual noise or decreased performance.
These simple tips help avoid a large part of common problems and optimize the system's lifespan.
An installation that reflects the AirGreen approach
At AirGreen, we approach each installation as a unique project. Even if the heat pump model may be the same from one house to another, the installation conditions always change: wall type, available space, outdoor clearance, unit orientation, electrical access, aesthetic constraints, and client needs.
In Îles-Laval, the main challenge was to install the outdoor unit in a confined space, while maintaining easy access, a clean finish, and adequate protection against external conditions. The result is a compact, stable, and well-organized installation, perfectly suited to the property.
Our experience in wall-mounted heat pump projects in Laval, but also in Montreal, Longueuil, on the North Shore, and the South Shore, allows us to quickly recognize site constraints and propose the best approach from the outset.
This installation of the GREE CHARMO R32 Mini Split in Îles-Laval demonstrates what truly matters in a successful HVAC project: a good appliance, serious analysis, clean installation, secure connections, and available after-sales service. For the client, this means more stable comfort, better efficiency, and lasting peace of mind.
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).