Installation of a Gree Lomo 23 Wall-Mounted Heat Pump in Montreal
Transform your home with the Gree Lomo 23 heat pump—smart technology, sublime comfort. Installed by AirGreen, the choice for quality in Montreal.
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 Tale of Technology and Comfort: The Gree Lomo 23 Installation Story
The Project Background
At AirGreen, our commitment to delivering top-notch HVAC solutions is evident in our careful selection of products and the meticulous planning that goes into every installation. Our recent project in Montreal—a Gree Lomo 23 wall-mounted heat pump installation—perfectly exemplifies this dedication.
Why Gree Lomo 23?
The Gree Lomo 23 stands out due to its exceptional features and capabilities. Rated at 18,000 BTU with a cooling and heating capacity that withstands temperatures down to -25°C, this model is a powerhouse in maintaining home comfort. It’s not just about powerful performance; the Lomo 23 is also an Energy Star® certified product, ensuring energy efficiency and eligibility for substantial federal and provincial grants, making it an economically smart choice.
Compact and Unobtrusive Design
The sleek dimensions (38.20 x 8.81 x 11.81 inches for the interior unit and 38 x 15.59 x 27.56 inches for the exterior unit) are designed to blend seamlessly with any home décor. Its unobtrusive presence in one of Montreal's stylish apartments is a testament to how technology can integrate elegantly into personal living spaces without dominating them.
Intelligent Features for Enhanced Comfort
The Lomo 23 features intelligent defrosting and a G10 inverter technology that minimizes energy consumption while maximizing temperature stability. These features not only enhance comfort but also contribute to the longevity of the unit by maintaining efficient operation even in the coldest months.
Installation Highlights
Our installation team faced a unique challenge with this project. The site was a beautifully renovated apartment with modern interiors where every square inch mattered. Precision was key in ensuring that the installation did not disrupt the aesthetic or structural integrity of the space.
Strategic Placement
After consulting with the homeowner, we chose a location above the living area that provided optimal air distribution without interfering with the room's focal elements. The strategic placement also allowed for easier connection to the existing electrical setup and minimal visible wiring, which was a crucial consideration for our client.
Attention to Detail
Every step of the installation process was marked by a keen attention to detail. From the careful drilling to ensure no unnecessary damage to the walls, to the meticulous setup of the outdoor unit in a way that it remained discreet yet functional, our team ensured a smooth and clean installation. The process was completed with a thorough testing phase to guarantee everything was in top working condition.
Client's Feedback
The homeowner was thrilled with the result. The efficiency of the heat pump and its low noise levels (39 dB(A) internally) meant that they could enjoy their home comfort silently and effectively. The added advantage of the 10-10-10 warranty (10 years on the compressor, parts, and labor) provided them with peace of mind regarding their investment.
The AirGreen Difference
This installation is a perfect showcase of the AirGreen promise: expert installation, high-quality products, and a focus on customer satisfaction. Each project we undertake is backed by our commitment to enhance the comfort and lives of our clients through innovative HVAC solutions.
Other Key Features:
- Wi-Fi Control: Optional for tech-savvy homeowners.
- Self-Diagnosis: Facilitates quick maintenance.
- Eco-Friendly: Uses R-410A refrigerant.
- Sound Levels: Maintains a quiet operation.
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.
More jobs to see, near you
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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).