Installation of a Gree Charmo 19 Wall-Mounted Heat Pump in Montreal
See how AirGreen transformed this Montreal home with the Gree Charmo 19 heat pump, offering energy-efficient heating and cooling all year long! Discover why this installation stands out.
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 Reliable HVAC Solution for Every Season
When we were contacted by a homeowner in Montreal for the installation of a Gree Charmo 19 wall-mounted heat pump, we knew we were about to make their home significantly more comfortable. This model is one of the most dependable on the market, boasting both efficiency and a sleek design. Our team at AirGreen is highly experienced in the installation of energy-efficient HVAC systems, and this installation was another opportunity to showcase our skills.
The homeowner was seeking a solution that could handle both the sweltering summer heat and the brutal winter cold. After assessing their needs and space, we recommended the Gree Charmo 19. With a 12,000 BTU cooling capacity and the ability to heat even in temperatures as low as -25°C, this heat pump is the perfect fit for Montreal’s unpredictable climate.
Why the Gree Charmo 19?
The Gree Charmo 19 isn’t just any heat pump. It’s a system that balances performance with energy savings. Rated at 17.5 SEER, it provides optimal cooling while keeping energy bills low. This is crucial for homeowners looking to cut down on long-term costs while maintaining year-round comfort. Although the unit doesn’t qualify for federal grants, it does come with a $340 provincial grant, courtesy of the LogisVert program by Hydro-Québec, making it an attractive option for eco-conscious homeowners.
Moreover, the Wi-Fi capability of this unit allows the homeowner to control the system remotely. Imagine being able to adjust the temperature on a hot day before you even get home, or setting a lower temperature at night without leaving the comfort of your bed. The Gree Charmo 19 makes all of this possible, giving homeowners convenience and comfort at their fingertips.
The Technical Details
The installation process for this particular model required precision. The interior dimensions of the unit are 32.88 x 7.88 x 10.88 inches, and its exterior dimensions are 28.81 x 13 x 21.88 inches. Our team had to ensure that these dimensions fit perfectly within the homeowner’s space. Additionally, we carefully measured the piping, using the recommended 1/4 - 3/8 pipes, and made sure the system was powered by the required 220V voltage.
Since the Gree Charmo 19 uses R-410A refrigerant, an environmentally friendly gas, we were careful to comply with all regulations regarding its installation. Furthermore, the system operates with minimal noise, producing 52 dB(A) on the exterior and 37/57 dB(A) on the interior, ensuring that the homeowner can enjoy a peaceful and quiet environment.
Installation Challenges and Solutions
No installation is without its unique challenges. In this case, the homeowner had limited space for the external unit. However, our experienced technicians were able to find an optimal location that would not only allow the unit to function efficiently but also blend aesthetically with the home's exterior.
Additionally, we faced a minor obstacle when connecting the unit to the existing electrical system. Our team worked diligently to ensure the heat pump was connected safely and correctly, preventing any future issues. We pride ourselves on our thorough post-installation checks to guarantee everything is working perfectly before we leave the site.
Customer Satisfaction and Aftercare
At AirGreen, customer satisfaction is our top priority. Once the Gree Charmo 19 was installed and operational, we provided the homeowner with a comprehensive tutorial on how to use the system, including its Wi-Fi controls. We also set up a follow-up appointment to ensure the system continues to function optimally and to answer any additional questions the homeowner may have.
The unit comes with a 12-year warranty on both the compressor and parts, and we offer an extended warranty that covers 10 years on parts, compressor, and labor. This peace of mind is invaluable for homeowners, knowing that they are covered for the long term.
A Step Towards Energy Efficiency
The Gree Charmo 19 is an excellent investment for any homeowner looking to reduce their environmental impact without sacrificing comfort. It operates efficiently in both extreme cold and heat, making it ideal for the climate in Montreal, Laval, Longueuil, the South Shore, and the North Shore. The LogisVert provincial grant not only helps reduce the initial installation cost but also encourages homeowners to invest in energy-saving solutions.
By installing this unit, the homeowner has taken a significant step toward energy efficiency, reducing their overall carbon footprint while enjoying consistent comfort in their home.
Why Choose AirGreen?
At AirGreen, we don’t just install HVAC systems—we provide a complete service. From the moment you contact us to the final installation, our team ensures that your experience is smooth and professional. We understand that HVAC systems are a big investment, and we are committed to delivering installations that last.
- Professionalism: Our technicians are trained to handle even the most complex installations.
- Customer-first approach: We take the time to understand your unique needs and tailor our solutions accordingly.
- Comprehensive warranties: We offer some of the best warranties in the industry, ensuring your investment is protected.
- Post-installation support: We offer aftercare services to ensure your system runs efficiently for years to come.
We serve the Greater Montreal area, including Laval, Longueuil, the South Shore, and the North Shore, ensuring that homeowners across the region have access to top-notch HVAC systems and services.
A Reliable HVAC Installation for Montreal’s Weather
The homeowner was thrilled with the results, noting an immediate improvement in the home's indoor climate. The Gree Charmo 19 heat pump has already proven to be a valuable addition to the household, providing comfort throughout the extreme fluctuations in Montreal's weather.
At AirGreen, we take pride in our work. Each installation, like this one, is an opportunity to improve a client’s quality of life by providing them with a reliable, energy-efficient solution for their home. Whether you're battling the cold winters or humid summers, a well-installed heat pump is key to year-round comfort. We look forward to helping more homeowners make their homes energy-efficient and comfortable in the future.
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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Every house has its constraints. We see them before we install.
The on-site estimate is free and the quote follows within 24 hours.
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).