Installation of an LG Inverter V wall-mounted heat pump in Rosemont–La Petite-Patrie
Installation of an LG Inverter V wall-mounted heat pump in Rosemont. Four-season comfort, energy efficiency, and grants available. AirGreen, your HVAC expert in Montreal, Laval, Longueuil, North Shore, and South Shore.
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Modern comfort in the heart of a Montreal duplex
In the Rosemont–La Petite-Patrie neighborhood, an area where red brick houses sit side by side with modern condos, we recently completed the installation of an LG Inverter V wall-mounted heat pump . This installation perfectly illustrates the trend among homeowners to modernize their interior comfort while respecting the aesthetics of their homes.
Why choose an LG Inverter V heat pump?
LG wall-mounted heat pumps are distinguished by their Inverter V technology, offering stable and energy-efficient performance. The model chosen by our client allows for efficient cooling in the summer and reliable heating in the winter , even when temperatures drop well below zero. This type of machine is particularly suitable for Montreal homes, which often face marked climatic variations.
Key Benefits of the LG Inverter V Heat Pump
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Inverter V technology : automatic power adjustment for constant comfort.
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Energy efficiency : reduced electricity costs thanks to high efficiency.
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Quiet comfort : quiet operation, ideal for a bedroom or living room.
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Discreet aesthetics : understated design that blends perfectly into modern interiors.
The particularities of the installation
During this installation in Rosemont, several technical elements were taken into account:
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Optimal wall positioning : the interior head has been placed high up, near a window, allowing for even diffusion of air.
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Direct wall outlet : the refrigerant pipes and electrical wiring were installed with discreet capping , ensuring a clean and harmonious finish with the wall.
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Gravity drainage : thanks to its proximity to the outside, the condensate system could be evacuated naturally, avoiding the need for a lifting pump.
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Secure installation : the outdoor unit, placed on a suitable support, is designed to withstand the harsh winters of Greater Montreal .
The context of the project
Our client, the owner of a typical brick duplex in Rosemont, wanted to replace an old wall-mounted air conditioner with a more versatile system. The goal was twofold:
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Improve four-season comfort by benefiting from efficient supplemental heating.
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Access available grants , particularly through government programs related to energy efficiency.
We accompanied the client through every step, from selecting the LG Inverter V model to installation and commissioning, including explaining the administrative procedures for energy-saving subsidies offered to residents of Montreal, Laval, the South Shore and the North Shore.
A sustainable and cost-effective choice
Thanks to this installation, the customer now benefits from:
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Optimal comfort all year round , with efficient air conditioning and efficient heating even in cold weather.
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A significant reduction in energy costs , thanks to the high efficiency of the Inverter V.
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Peace of mind : like all our installations, this heat pump is covered by a solid warranty and the expertise of our team specializing in HVAC installation in Montreal.
AirGreen expertise at your service
At AirGreen , we understand that every project is unique. Our teams always assess the home's environment, layout, and specific client needs before proposing a solution. This personalized approach allows us to guarantee a durable, aesthetic, and efficient HVAC installation in all areas of Greater Montreal, whether in Rosemont, Laval, Longueuil, the North Shore, or the South Shore .
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).