Installation of a GREE CHARMO R32 wall-mounted heat pump in Sainte-Catherine
HVAC installation in Sainte-Catherine of a GREE CHARMO R32 wall-mounted heat pump. A powerful, quiet, and climate-adapted solution for the South Shore, ideal for heating and air conditioning.
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A HVAC Installation Perfectly Suited for a Bright Condo on the South Shore
At AirGreen, we recently completed a GREE CHARMO R32 wall-mounted heat pump installation in a condo located in Sainte-Catherine, on the South Shore of Montreal. This project perfectly illustrates our approach: a precise analysis of the space, rigorous equipment selection, and a clean, durable, and high-performance installation.
Upon our arrival on-site, we noted that the client wished to improve both thermal comfort in winter and air conditioning in summer, while also reducing their energy consumption. The condo, located on an upper floor with large windows, presented significant temperature variations depending on the season.
The image above clearly shows the indoor unit installed high up, just above a window, a strategic position allowing for optimal air distribution throughout the room.
Why the GREE CHARMO R32 was the ideal choice
A powerful and compact wall-mounted heat pump
The GREE CHARMO R32 model is one of the most effective modern solutions for homes in Montreal, Laval, Longueuil, and the South Shore. This compact wall unit offers an excellent balance of performance, discretion, and energy efficiency.
Among its main advantages:
- R32 Refrigerant: More eco-friendly and efficient than older gases
- Effective heating operation even in cold Quebec weather
- Very low noise level, ideal for living spaces
- Sleek design that easily integrates into a modern interior
- Precise temperature control (shown here set to 28°C)
Capacity and performance adapted to the dwelling
For this project in Sainte-Catherine, we selected a capacity suited to the condo's area and insulation. A common mistake in HVAC is oversizing or undersizing equipment. At AirGreen, we always perform a precise thermal calculation to avoid:
- Excessive energy consumption
- Inefficient short cycles
- Premature system wear
Challenges encountered during installation
Strategic positioning above the window
The installation visible in the image has a unique feature: the indoor unit is installed above a large window. This choice is never accidental.
Our technicians had to consider:
- The wall structure to ensure solid fastening
- The necessary space for air circulation
- Optimal access for future maintenance
- The overall aesthetics of the room
This type of installation requires great precision to avoid problems with condensation, noise, or performance.
Conduit routing and visual discretion
In this condo, the challenge was also to maintain a clean and discreet finish. Therefore, we:
- Minimized the visual impact of the conduits
- Optimized the routing of refrigerant lines
- Ensured complete insulation to prevent any loss of efficiency
The result: an installation that is virtually invisible from the inside, with maximum performance.
AirGreen Installation Process
Key project steps
Here’s how this wall-mounted heat pump installation in Sainte-Catherine unfolded:
- On-site evaluation
Analysis of client needs, inspection of walls, windows, and insulation. - System selection
Recommendation of the GREE CHARMO R32 model based on the volume to be air-conditioned and heated. - Site preparation
Surface protection, preparation of wall supports. - Indoor unit installation
Precise wall mounting, as illustrated in the image. - Outdoor unit installation
Positioned to maximize performance and reduce noise. - Connection and commissioning
Complete tests, pressure checks, system calibration. - Client training
Explanation of operation and best usage practices.
Final result: comfort and energy efficiency
After the installation, the client immediately noticed:
- Uniform temperature throughout the room
- A significant reduction in noise compared to their old system
- Rapid heat-up despite cold outdoor temperatures
The heat pump, set to 28°C in the image, demonstrates its ability to provide efficient heating even in winter.
Subsidies and energy savings in Quebec
One of the important aspects for our clients on the South Shore, Montreal, and Laval is access to financial aid programs.
The GREE CHARMO R32 heat pump may be eligible for certain provincial subsidies, especially if it meets the current energy efficiency criteria.
At AirGreen, we assist our clients in:
- Checking eligibility for programs
- Preparing necessary documents
- Maximizing possible savings
Practical advice for a successful installation
What to avoid
Throughout our many HVAC installations, we have identified common mistakes:
- Installing the unit too low or in a closed corner
- Neglecting the importance of duct insulation
- Choosing equipment based solely on price
- Ignoring regular maintenance
Our recommendations
To guarantee the performance of your wall-mounted air conditioner or heat pump:
- Always use certified professionals
- Request a complete thermal evaluation
- Schedule annual maintenance
- Ensure that the installation complies with local standards
Why choose AirGreen for your HVAC installation
Our expertise in the Montreal, Laval, Longueuil, North Shore, and South Shore regions allows us to offer installations perfectly adapted to Quebec's climatic realities.
What sets us apart:
- A personalized approach for each project
- Clean, durable, and aesthetic installations
- In-depth knowledge of equipment like GREE CHARMO R32
- Reliable and accessible after-sales service
Conclusion: an optimized installation for the Quebec climate
This installation in Sainte-Catherine demonstrates that a well-chosen and properly installed wall-mounted heat pump can transform the comfort of a living space.
Thanks to our expertise in HVAC installation, the client now benefits from a high-performance, quiet, and economical system, perfectly adapted to the region's climatic variations.
At AirGreen, every project is an opportunity to demonstrate our expertise and commitment to quality.
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).