Installation of a wall-mounted LG heat pump in Montreal North
Installation of an LG wall-mounted heat pump in Montreal North. AirGreen ensures four-season comfort and energy savings with optimized installation in residential settings.
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The job on one screen
The article, chapter by chapter
An optimized HVAC installation for a duplex in Quebec winter
At AirGreen , we recently installed an LG wall-mounted heat pump in a duplex in the Montreal North area. In this residential neighborhood characterized by its brick buildings and typical metal balconies, our clients wanted a four-season heating and cooling solution, adapted to harsh winters and increasingly hot summers.
The request was clear: install a high-performance unit that could reduce dependence on traditional electric heating while ensuring constant comfort.
Choosing an LG wall-mounted heat pump
LG was a strategic choice for this project. Its wall-mounted heat pumps are recognized for:
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Their inverter technology , guaranteeing intelligent power modulation.
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Stable performance down to -25°C , ideal for Montreal's climate.
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A compact and modern design , perfectly suited to urban spaces.
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High energy efficiency , contributing to savings on the electricity bill.
The model chosen by the customer, with a capacity of 12,000 BTU , is designed to meet the needs of an area of approximately 450 to 500 sq. ft., the equivalent of a full floor of the duplex.
Key steps of installation
Our technicians carried out a custom installation, despite winter conditions and a restricted environment on the rear balcony.
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External compressor mounting
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The LG outdoor unit was installed on sturdy wall brackets , fixed directly into the brick.
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This choice frees up floor space on the balcony and avoids any obstruction by accumulated snow.
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Passage of refrigerant pipes
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The pipes were laid discreetly, with exterior capping matching the brick , ensuring an aesthetic finish and protection against the elements.
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The total length of the links has been reduced to a minimum, optimizing the efficiency of the system.
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Condensation drain management
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Due to the winter season, special attention was paid to the drain. The system was configured for gravity flow , avoiding the risk of freezing and reducing the need for maintenance.
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Electrical connection
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A direct connection to the electrical panel was made with a dedicated circuit breaker, in accordance with RBQ standards.
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The wiring has been secured to withstand outdoor conditions (rain, snow, thermal variations).
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Commissioning and testing
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After a leak test and a vacuum, the device was put into operation.
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The performance was checked in heating mode , confirming a homogeneous diffusion of hot air throughout the floor.
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The challenges encountered
This installation presented two main challenges:
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Limited space on the rear balcony : we opted for a high wall installation to free up circulation and secure the device.
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Winter conditions : Working in cold weather requires rigorous preparation. Our technicians used specially designed equipment to ensure precise work despite the snow and ice.
Results and benefits for the client
The customer now benefits from four-season comfort thanks to:
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A stable and pleasant temperature in winter and summer .
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Reduced electricity bills , thanks to the energy efficiency of the LG heat pump.
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A discreet and aesthetic installation , perfectly integrated into the brick facade of the duplex.
Grant Eligibility
LG Energy Star -certified wall-mounted heat pumps are generally eligible for financial assistance programs such as Chauffez Vert or the federal Greener Homes program. This installation in Montreal North therefore opens the door to additional savings thanks to subsidies.
Why choose AirGreen for your HVAC projects?
By entrusting your project to AirGreen , you benefit from:
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Specialized and certified technicians , accustomed to working in various residential contexts (condos, duplexes, single-family homes).
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Safe and compliant installations , respecting Quebec electrical and mechanical standards.
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Complete support , from needs analysis to grant optimization.
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A solid presence throughout Greater Montreal: Montreal, Laval, Longueuil, North Shore and South Shore .
Conclusion: guaranteed comfort all year round
This installation of an LG wall-mounted heat pump in Montreal North demonstrates the importance of technical expertise and careful planning, especially in demanding winter conditions. With AirGreen, every customer benefits from a reliable, efficient, and sustainable HVAC solution.
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).