Installation of a Gree Extreme wall-mounted heat pump in Ville Mont-Royal, Montreal
From noisy old systems to the silent efficiency of the Gree Extreme - join us on a journey of a perfect HVAC installation in the Town of Mount-Royal!
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.
The Ultimate HVAC Solution: Quiet, Efficient, and Reliable
The Backstory: A Quest for the Perfect HVAC
In the picturesque Town of Mount-Royal, a homeowner faced a dilemma. Their old HVAC system, which had served them for a mere 5 years, was on its last legs. It was noisy, inefficient, and, to top it off, had a warranty that had just expired. The costs to repair it were astronomical. But every cloud has a silver lining. This was the moment AirGreen stepped in, turning their HVAC woes into a story of triumph.
Why Gree Extreme?
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Top-notch Efficiency: With a staggering 24.5 SEER efficiency rating, the Gree Extreme is in a league of its own. It's not just about saving on electricity bills; it's about getting the best cooling and heating experience.
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Silent Operation: Say goodbye to the constant hum and buzz of old HVAC systems. With an interior sound pressure level of just 34 / 51 dB(A), the Gree Extreme ensures peace and quiet.
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Built for Extreme Conditions: Whether it's the scorching heat of summer or the bone-chilling cold of winter, the Gree Extreme is built to perform. It boasts a heating capacity that can withstand temperatures as low as -30°C.
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Warranty That Speaks Volumes: A 10-year warranty on everything - compressor, parts, and labor. That's a decade of peace of mind!
The Installation Process: A Seamless Transition
Our team at AirGreen prides itself on its meticulous attention to detail. During the installation in the Town of Mount-Royal, we noticed that the old pipes matched the requirements of the Gree Extreme. This meant no drilling, no additional holes, and a much smoother installation process. But we didn't just take things at face value. We double-checked the old pipes for any potential leaks or damages. Only after ensuring they were in pristine condition did we proceed. The result? A clean, efficient installation that left our customer overjoyed.
Double Grant by Hydro-Québec: The Icing on the Cake
One of the standout features of the Gree Extreme is its eligibility for the Double Grant by Hydro-Québec. Our customer was able to avail a whopping $1704 grant, making the deal even sweeter.
Key Features of the Gree Extreme Wall-Mounted Mini Split
- Cooling Capacity: 18,000 BTU
- Serial Numbers:
- Interior: GWH18AAE-D3DNA2A/I
- Exterior: GWH18YE-D3DNA1A/O
- Dimensions:
- Interior: 43.34 x 9.81 x 12.88
- Exterior: 38.56 x 16.81 x 31.11
- Connectivity: Comes with WiFi included, ensuring you can control your HVAC from anywhere.
- Certifications: Proudly sporting the Energy Star® badge.
- Gas: Uses R-410A Freon, ensuring efficient operation.
Conclusion: Another Satisfied Customer
The story of our installation in the Town of Mount-Royal is one of many. At AirGreen, we don't just install HVAC systems; we build relationships. Our commitment to quality, combined with the unparalleled features of the Gree Extreme Wall-Mounted Mini Split, ensures that our customers always have a smile on their faces.
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).
1 comment
Bonjour,
Il s’agit d’une question que j’espere vous preniez le temps pour repondre sinon je comprends que non.
J’ai fait affaire a un compétiteur pour l’installation de ma thermopompe.
Lors de l’installation ils on fait plusieurs trou dans mon plafond pour passer le fil electrique vers ma boite electrique.
Je me demandais si la réparation de ces trou, est selon vous, comprise normalement dans l’installation gratuite.
Désolé de la question non relié a vous.
Merci :)