Installation of a GREE CHARMO R32 wall-mounted heat pump in Saint-Bruno
Expert installation of a GREE CHARMO R32 wall-mounted heat pump in Saint-Bruno in a confined space. An efficient, quiet HVAC solution adapted to the realities of Montreal and the South Shore.
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Careful Integration in a Confined Space: A Look Back at a Strategic Installation in Saint-Bruno
At AirGreen, every HVAC installation project has its own specificities. In Saint-Bruno, we recently installed a GREE CHARMO R32 wall-mounted heat pump in a relatively compact interior space, combining a narrow hallway and an adjacent laundry room. This type of configuration requires increased technical precision to optimize both the appliance's performance and the overall aesthetics of the installation.
From the first visit, our team identified several challenges: limited ceiling height, proximity to a laundry area, potentially obstructed airflow, and access constraints for installation. Thanks to our expertise in wall-mounted air conditioners and mini splits, we designed a customized solution perfectly adapted to the client's needs.
Technical Details of the GREE CHARMO R32 Heat Pump
A Powerful and Energy-Efficient Solution
The GREE CHARMO R32 model is renowned for its reliability and energy efficiency. For this installation in Saint-Bruno, we selected a wall-mounted unit suitable for an average area, offering an excellent compromise between power and energy consumption.
Key features of the installed unit:
- Type: Wall-mounted heat pump (mini split)
- Refrigerant: R32, more ecological and efficient than older gases
- Capacity: approximately 12,000 BTU, ideal for a moderately sized residential space
- SEER (cooling efficiency): up to 20+
- HSPF (heating efficiency): efficient for Quebec winters
- Quiet operation: perfect for living areas and hallways
- Modes: heating, cooling, dehumidification, and ventilation
This model is also eligible for certain subsidy programs in effect in Quebec, allowing homeowners to reduce their initial investment while benefiting from a high-efficiency energy system.
Site Analysis and Installation Challenges
An Atypical Space Between Hallway and Laundry Room
The image clearly shows the layout of the space: a narrow area with a stacked washer-dryer on the left and a central wall used for the installation of the indoor unit. This type of environment presents several constraints:
- Limited airflow
- Risk of condensation due to proximity to the laundry room
- Restricted access for installation and future maintenance
- Reduced ceiling height with recessed lighting
Our Technical Approach
To ensure optimal performance, we:
- Positioned the wall-mounted unit high up, just below the ceiling, to optimize air distribution in the corridor and adjacent rooms.
- Checked the minimum clearances recommended by the GREE manufacturer to ensure adequate airflow.
- Installed a perfectly sealed drainage system to prevent any moisture accumulation near the laundry room.
- Used sturdy and perfectly leveled supports to ensure the unit's stability.
Step-by-Step Installation Process
Preparation and Planning
Before any installation, we carried out a complete thermal assessment of the dwelling. This allowed us to confirm that the chosen capacity (12,000 BTU) was adequate.
Indoor Unit Installation
- Fixing of the wall plate
- Precise drilling for refrigerant lines
- Installation of electrical wiring compliant with standards
Outdoor Unit Installation
Even if it does not appear in the image, the outdoor unit was installed in a strategic location outside the building, respecting:
- Noise standards
- Regulatory distances
- Weather protection
Commissioning
- Leak test
- Vacuuming of lines
- Charging of R32 refrigerant
- Full operational check
Final Result: Comfort and Efficiency Delivered
Once the installation was complete, the client immediately noticed an improvement in thermal comfort. Despite the complex initial configuration, the GREE CHARMO R32 wall-mounted heat pump now ensures:
- A stable temperature throughout the dwelling
- A noticeable reduction in humidity
- Quiet operation, even at full capacity
Practical Advice for Homeowners
What to Avoid
- Installing a unit that is too powerful or too weak for the space
- Neglecting clearances around the unit
- Ignoring the importance of good drainage
Recommended Best Practices
- Call a certified professional for any HVAC installation
- Schedule regular HVAC maintenance
- Clean filters every 1 to 3 months
Why Choose AirGreen for Your Installation in Saint-Bruno, Montreal, Laval, or Longueuil
Our team stands out for:
- In-depth expertise in wall-mounted heat pumps and mini splits
- Precise knowledge of the climatic realities of the South Shore, Montreal, and surrounding areas
- A personalized approach for each project
- Attention to detail, even in the most complex spaces
Every installation we carry out is designed to last, offer optimal comfort, and maximize energy savings.
A Concrete Achievement Reflecting Our Expertise
This project in Saint-Bruno perfectly illustrates our ability to transform a challenging space into a modern and efficient comfort solution. Thanks to rigorous planning and precise execution, we were able to make the most of the GREE CHARMO R32 technology in an environment that demanded finesse and expertise.
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).