Installation of an LG Dual Inverter wall-mounted heat pump in Rosemont–La Petite-Patrie
AirGreen installed an LG Dual Inverter wall-mounted heat pump in a kitchen in Rosemont–La Petite-Patrie, optimizing HVAC comfort and energy savings for residents of Greater Montreal.
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The job on one screen
The article, chapter by chapter
Modern comfort in the heart of Montreal cuisine
At AirGreen , we transform each HVAC installation into a personalized solution, adapted to the architecture and lifestyle of Greater Montreal residents. Recently, our team installed an LG Dual Inverter wall-mounted heat pump in a duplex kitchen located in Rosemont–La Petite-Patrie . The goal: to provide stable thermal comfort while respecting the space constraints of a room where every inch counts.
Context of the project in Rosemont
The owner of a typical duplex in the area contacted us to upgrade his HVAC system. The space to be air conditioned and heated was located in the kitchen, an environment where heat and humidity can quickly become uncomfortable.
The old portable air conditioner consumed too much energy and didn't provide effective temperature regulation. Choosing an LG wall-mounted heat pump was therefore an ideal solution: small footprint, high energy efficiency, and quiet operation.
Technical specifications of the LG Dual Inverter
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Type : Wall-mounted heat pump (mini-split)
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Brand : LG
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Model : Dual Inverter (Energy Star certified range)
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Capacity : 9,000 BTU (enough for a kitchen and adjoining space of 350 to 400 sq. ft.)
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Performance : High SEER2, HSPF2 optimized for Quebec winters
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Key technology : Dual Inverter compressor providing quieter operation and reduced energy consumption
Installation process
Main steps
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Assessment and preparation : We chose a high location, above the kitchen cabinets, to free up wall space and optimize air circulation.
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Wall drilling : discreet passage of refrigerant connections and electrical wiring to the outside, with white capping to match the walls.
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Indoor Unit Mounting : LG wall head installation with precise clearance to avoid interference with cabinets.
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Connection to the external compressor : positioned on a wall bracket at the rear of the duplex to limit noise pollution and ensure good condensate drainage.
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Calibration and testing : pressure verification, gravity drainage control and complete performance testing.
Constraints encountered and solutions
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Proximity to cabinets : The unit had to be installed directly above tall cabinets, requiring increased precision to ensure easy access to the front panel and optimal airflow clearance.
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Condensate management : the limited space required carefully planned gravity drainage to avoid any accumulation of water near kitchen units.
Results for the client
The owner now benefits from:
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Stable thermal comfort in summer and winter.
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A quiet appliance, ideal for family cooking.
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A significant reduction in the electricity bill , thanks to Inverter technology.
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An aesthetic solution , perfectly integrated into a restricted space.
In addition, the LG Dual Inverter model is eligible for local subsidies (Montreal, Laval, Longueuil, North Shore, South Shore), which further reduces the net cost of the project.
Maintenance and durability
To maximize the life of your LG heat pump:
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Filters should be cleaned every 2 to 3 months , especially in a kitchen where the air contains more particles.
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A complete annual maintenance by AirGreen is recommended: checking the outdoor compressor, cleaning the coils, inspecting the refrigerant and calibrating the system.
Why entrust your HVAC installation to AirGreen?
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Local expertise : regular installations in Rosemont, Plateau, Hochelaga and throughout Montreal.
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Complete service : advice on choosing the model, professional installation and support with grant applications.
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Quality guarantee : compliance with RBQ standards and optimization of energy performance.
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Customer satisfaction : comfort, savings and peace of mind guaranteed.
Conclusion
This installation in Rosemont–La Petite-Patrie illustrates AirGreen's ability to adapt LG Dual Inverter technology to the real-world constraints of a Montreal home . The wall-mounted heat pump offers an ideal compromise between performance, compact design, and energy savings.
At AirGreen, we are committed to improving the comfort of homes in Montreal, Laval, Longueuil, the North Shore and the South Shore , one project at a time.
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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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).