Installation of a Gree Extreme Wall-Mounted Air Conditioner on the South Shore
Discover how AirGreen installed a Gree Extreme 12,000 BTU wall-mounted air conditioner, bringing year-round comfort to a South Shore home with maximum efficiency and eco-friendly technology.
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Bringing Efficiency and Comfort to Your Home with AirGreen
At AirGreen, our mission is to deliver outstanding HVAC solutions tailored to the unique needs of each household. Recently, we completed the installation of a Gree Extreme Wall-Mounted Air Conditioner in a beautiful home located on the South Shore of Montreal. This was no ordinary installation—it was an opportunity to showcase the state-of-the-art technology of Gree's latest model, designed specifically for the harsh Canadian winters and the sweltering summers of Quebec.
A Closer Look at the Gree Extreme: Perfect for the Canadian Climate
When it comes to Canadian weather, you need a machine that can handle extremes. The Gree Extreme 12,000 BTU wall-mounted air conditioner is engineered to withstand everything from intense summer heat to the freezing cold of winter. With a cooling capacity of 12,000 BTU and a heating capacity rated for temperatures as low as -30°C, this unit stands as a champion of both efficiency and comfort.
For this particular installation, we were excited to bring the Gree Extreme's ultra-heat technology to our client's home, ensuring that they would enjoy year-round comfort, no matter what Mother Nature throws their way.
Specifications of the Installed Gree Extreme Model:
- Cooling Capacity: 12,000 BTU
- Heating Capacity: Operates effectively down to -30°C
- SEER Rating: An impressive 30.5 SEER, making it one of the most energy-efficient units on the market.
- Sound Pressure Level (Interior): A quiet 22/49 dB(A), ensuring peaceful indoor environments.
- Dimensions: Compact and space-saving design with the interior unit measuring 38.19 x 8.86 x 11.81 inches and the exterior unit at 35.38 x 14.88 x 23.5 inches.
- Warranty: A robust 10-year warranty covering parts, compressor, and labor.
The Challenge: Finding the Perfect HVAC Solution
Our clients on the South Shore had been searching for a system that would not only cool their home efficiently but also provide reliable heating during the colder months. Their existing system had been outdated, noisy, and costly to run, which made them look for a modern, eco-friendly solution that was also cost-effective. After consulting with us, we recommended the Gree Extreme Ultra Heat 12,000 BTU model, a top-tier option that perfectly matched their needs.
What made this installation even more appealing to the client was the unit's eligibility for a $972 rebate through the LogisVert program from Hydro-Québec, allowing them to save on their upfront investment. The federal and provincial subsidies available for this unit made it an even more attractive option, reducing the financial burden while increasing long-term energy savings.
Step-by-Step Installation Process
Step 1: Initial Assessment
The first step in any installation is understanding the unique layout and specific needs of the home. Upon arrival, our technicians assessed the placement of the wall-mounted air conditioner and determined the ideal location for the interior and exterior units to ensure optimal airflow and energy efficiency.
Step 2: Installation of the Exterior Unit
Since the exterior unit plays a critical role in heat exchange, we carefully positioned it in a spot that would minimize noise while maximizing performance. The Gree Extreme’s outdoor unit is specially designed with a heating base to prevent ice buildup, ensuring smooth operation even during frigid winter months. This feature provides peace of mind, as it prevents efficiency loss due to condensate freezing, a common problem in colder regions.
Step 3: Installing the Interior Unit
Inside the home, we mounted the sleek, modern interior unit in the living room, where it would provide maximum comfort. Its compact design meant that it blended seamlessly into the home’s décor, and with its Wi-Fi capabilities, our client now has full control over the unit from their smartphone using the GREE+ app.
We also ensured that the unit was aligned for horizontal and vertical airflow, allowing the client to enjoy consistent cooling and heating throughout their space. The four-direction motorized louvers help distribute air evenly, which is particularly useful for maintaining a comfortable temperature in large living areas.
Step 4: Final Connections and Testing
The final step involved connecting the piping and electrical wiring, ensuring that everything was done to code and safety standards. After double-checking all connections and making sure that the Freon R-410A gas was correctly charged, we tested the system.
The results were fantastic—the Gree Extreme Ultra Heat kicked into action quickly, cooling the room down within minutes thanks to its Turbo Mode. Even at its highest setting, the unit was whisper-quiet, a feature that our clients greatly appreciated.
Why Choose the Gree Extreme?
There are countless reasons why the Gree Extreme 12,000 BTU wall-mounted air conditioner is the best choice for homes in Montreal and surrounding areas. Here’s what sets it apart:
- Energy Star® Certified: This model is one of the most energy-efficient on the market, which means lower Hydro-Québec bills and a reduced carbon footprint.
- Eco-Friendly: Uses R-410A refrigerant, which is both environmentally responsible and highly effective at heat exchange.
- Two-Stage Compressor: Allows for more consistent and efficient heating and cooling, reducing energy waste and providing a more comfortable home environment.
- Automatic Restart & Memory: In the event of a power outage, the unit automatically restarts with the last saved settings, so there’s no need to worry about reprogramming it.
- Self-Diagnosis Feature: The unit’s self-diagnostic system helps identify issues early, ensuring fast and efficient repairs when needed.
Federal and Provincial Grants: Save While You Upgrade
One of the most significant advantages of upgrading to a Gree Extreme system is the financial incentives available. This specific unit qualifies for up to $5,000 in federal grants and $972 in provincial grants through Hydro-Québec’s LogisVert program. For homeowners, this means that upgrading to a high-efficiency HVAC system is more affordable than ever.
Customer Satisfaction: A Top Priority
At AirGreen, we pride ourselves on delivering not only exceptional products but also outstanding service. Our client was thrilled with the entire installation process, from the initial consultation to the final handoff. Thanks to the Gree Extreme, they now enjoy reliable heating and cooling, reduced energy bills, and a more comfortable living environment year-round.
A Green Choice for a Sustainable Future
By choosing the Gree Extreme wall-mounted air conditioner, our clients made an environmentally responsible choice that will benefit them in the long run. With its energy-efficient design, eco-friendly refrigerant, and impressive SEER rating, this system helps to lower energy consumption while keeping the home cozy and comfortable, no matter the season.
Trust AirGreen for Your HVAC Needs
If you're looking for an efficient, reliable, and eco-friendly solution for your home’s heating and cooling needs, the Gree Extreme 12,000 BTU wall-mounted air conditioner is the perfect choice. Contact AirGreen today to schedule a consultation and discover how we can enhance your home’s comfort with state-of-the-art HVAC systems tailored to your specific needs.
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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An on-site estimate, the right capacity, the right equipment.
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).