Installation of an LG wall-mounted heat pump in a condo in Saint-Laurent
Installation of an LG wall-mounted heat pump in a condo in Saint-Laurent. AirGreen offers discreet, efficient, and compliant HVAC solutions for Montreal, Laval, Longueuil, North Shore, and South Shore.
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 discreet and efficient air conditioning and heating solution for an urban condo
At AirGreen , we recently completed an LG wall-mounted heat pump installation in a condo in Montreal's Saint-Laurent district. The project perfectly illustrates the benefits of a compact, high-performance system in an urban environment where space is limited and aesthetics must be respected.
Choosing the LG heat pump for a condo
The installed LG wall-mounted heat pump offers a capacity adapted to the needs of a condo-type dwelling, providing both heating in winter and air conditioning in summer. The points that guided this choice:
-
Energy efficiency : high efficiency and potential eligibility for certain Energy Star equipment grants.
-
Compact format : discreet outdoor unit, easily installed on a balcony or terrace.
-
Year-round comfort : efficient heating down to low temperatures and quiet air conditioning for hot July days.
The particularities of the installation
The outdoor unit was installed directly on the balcony slab , an ideal solution for a condo where floor space is limited but stable. For aesthetics and durability, the refrigerant pipes were protected by a vertical brown capping perfectly integrated into the red brick facade.
Some notable technical details:
-
Single wall drilling to connect the outdoor unit to the indoor head.
-
Gravity flow of condensates, avoiding the addition of a lifting pump.
-
Aesthetic alignment with brick and architectural elements (lighting, doors, windows).
-
Safe working height on the balcony, without the need for lifting equipment.
Challenges encountered and solutions adopted
In this type of co-ownership building, several constraints apply:
-
Compliance with the co-ownership regulations : choice of quiet and discreet equipment.
-
Managing the reduced balcony space : precise positioning to preserve access to the patio door and avoid clutter.
-
Aesthetic integration : capping color harmonized with architectural elements to minimize visual impact.
Thanks to our experience, these challenges were successfully met and the installation was completed in just one day.
Results for the client
The owner now benefits from:
-
Optimal thermal comfort in all seasons .
-
An energy-efficient system to reduce your electricity bill.
-
A durable and discreet installation , which respects the standards of the co-ownership and improves the value of the condo.
Why choose AirGreen for your condo or apartment projects?
Our team is well-versed in the technical and regulatory requirements for condominium installations in Greater Montreal. We know how to adapt each project to combine performance, aesthetics, and compliance . Whether it's for an LG, Fujitsu, Gree, Sharp, or Mitsubishi heat pump , we offer customized solutions for urban residences in Montreal, Laval, Longueuil, the North Shore, and the South Shore .
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
By town, by equipment or by region: browse more than 4,700 published projects.
Each dot: a town where AirGreen has published projects. The glowing dot: this job.
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).