Installation of a GREE CHARMO R32 wall-mounted heat pump in Varennes
Installation of a GREE CHARMO R32 wall-mounted heat pump in Varennes: efficient, quiet HVAC solution adapted to the South Shore climate. AirGreen expertise in mini splits.
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 Discreet, High-Performance HVAC Installation Adapted to On-Site Realities in Varennes
At AirGreen, every HVAC installation project is an opportunity to demonstrate our rigor, attention to detail, and ability to adapt to varied environments. This installation of a GREE CHARMO R32 wall-mounted heat pump in Varennes is an excellent example. Located on an exterior brick wall, this intervention presented several technical challenges that our team skillfully overcame with precision.
The client wanted an effective solution for air conditioning in summer and heating during intermediate seasons, while minimizing the visual and sound impact of the outdoor equipment. We therefore recommended a GREE CHARMO R32 mini split, known for its reliability, energy efficiency, and quiet operation.
Technical Details of the Installed GREE CHARMO R32 Heat Pump
Modern Technology for Comfort
The GREE CHARMO R32 is a wall-mounted heat pump designed to offer an excellent balance between performance and energy consumption. It uses the R32 refrigerant, which is more environmentally friendly than previous generations, reducing the environmental footprint while improving system efficiency.
Key features include:
- Inverter technology allowing precise power adjustment
- Quiet operation suitable for residential areas
- Effective heating capacity even at low temperatures
- High-performance air conditioning mode during hot periods
- Precise indoor temperature control
In this Varennes project, the unit's capacity was carefully selected after a thermal load calculation to ensure optimal performance based on the building's area and insulation.
Challenges Encountered During Installation and Solutions Provided
Wall Mounting on Brick: Precision and Stability
The outdoor unit was installed on a wall bracket fixed directly into the brick. This type of installation requires special attention:
- Solid anchoring to support the unit's weight
- Vibration absorption to reduce noise
- Perfect alignment to ensure adequate drainage
We used robust brackets with shock absorbers to ensure a durable and quiet installation.
Managing Restricted Space and Obstacles
As visible on site, the area around the installation zone included:
- Conduits on the ground
- A protective tarp
- Vegetation near the wall
Our team carefully planned the unit's placement to:
- Maintain good airflow clearance
- Facilitate future maintenance
- Avoid any obstruction or debris accumulation
Clean and Safe Electrical Integration
The electrical connection was made via a disconnect box installed nearby. We ensured to:
- Comply with current electrical standards in Quebec
- Ensure optimal system protection
- Maintain an aesthetic installation with discreet wiring
Why Choose a Wall-Mounted Heat Pump in Varennes, South Shore?
An Ideal Solution for the Quebec Climate
In regions like Varennes, Longueuil, or more broadly the South Shore, temperature variations demand a versatile system. A wall-mounted heat pump allows for:
- Reduced heating costs in fall and spring
- Efficient air conditioning in summer
- Improved overall home comfort
Eligibility for Subsidies and Energy Savings
Depending on current criteria, several GREE heat pump models may be eligible for programs like Hydro-Québec's LogisVert, provided they meet certain performance requirements.
At AirGreen, we support our clients to:
- Verify the eligibility of their equipment
- Maximize available savings
- Provide all necessary documentation
Best Practices and Mistakes to Avoid During HVAC Installation
What We Recommend
- Always perform precise sizing before installation
- Choose a strategic location for the outdoor unit
- Ensure adequate condensation drainage
- Allow easy access for maintenance
Common Mistakes Observed
- Installation too close to the ground (risk of snow accumulation)
- Improper fastening on fragile surfaces
- Negligence of clearance around the unit
- Non-compliant electrical installation
Thanks to our experience in Montreal, Laval, Longueuil, and on the North Shore and South Shore, we systematically avoid these mistakes.
An AirGreen Installation: Expertise and Attention to Detail
A Personalized Approach
Every project is unique. For this installation in Varennes, we have:
- Analyzed site constraints
- Proposed a solution tailored to the client's needs
- Carried out a clean, safe, and durable installation
Customer Satisfaction and Performance Delivered
The client now benefits from:
- Optimal thermal comfort
- A quiet and discreet system
- A significant reduction in energy consumption
Conclusion: A Wise Choice for Lasting Comfort
The installation of this GREE CHARMO R32 wall-mounted heat pump in Varennes perfectly illustrates our commitment to quality and performance. At AirGreen, we put our HVAC installation expertise at the service of every client, whether in Montreal, Laval, Longueuil, on the North Shore, or the South Shore.
A well-installed system is a lasting investment. And that's exactly what we deliver, project after project.
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).