Installation of a Tosot Inverter wall-mounted heat pump in Saint-Laurent
Installation of a Tosot Inverter wall-mounted heat pump in Saint-Laurent by AirGreen. An efficient and aesthetic HVAC solution for Montreal, Laval, and the South Shore.
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 residential project where comfort and energy efficiency meet
At AirGreen , we recently completed the installation of a Tosot Inverter wall-mounted heat pump in a single-family home located in the Saint-Laurent area of Montreal . This project perfectly illustrates our meticulous and personalized approach to each HVAC project in Greater Montreal.
Project background
The owner was looking for an energy-efficient and reliable solution for all seasons to replace his old electric heating system. With frequent temperature fluctuations in the Montreal area, choosing a wall-mounted heat pump offered an ideal compromise between efficient winter heating and pleasant summer cooling .
The Tosot Inverter has established itself as a relevant choice, thanks to its stable operation at low temperatures and its optimized energy consumption.
The particularities of the installation
Our technicians installed the outdoor unit on a sturdy metal wall bracket , adapted to the vinyl facade of the residence. This configuration keeps the equipment from direct contact with the ground, reducing the risks associated with accumulated snow and facilitating maintenance.
Discreet electrical wiring and white capping that matches the house's siding ensure an aesthetically pleasing and professional finish. Condensate is drained by gravity, simplifying maintenance and reducing the need for additional equipment.
Advantages of the Tosot Inverter heat pump
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Inverter technology : continuous adaptation of power according to actual needs, guaranteeing reduced electricity consumption.
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Low temperature performance : efficient heating capacity even during the harsh winters of Montreal and Laval.
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Quiet comfort : low exterior noise level, ideal for a residential area like Saint-Laurent.
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Grant Eligibility : Depending on the exact model and its certification, the installation may be eligible for government programs in effect on the North Shore and the South Shore.
Challenges encountered and solutions provided
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Limited space on the exterior wall : To avoid any vibration and ensure optimal air circulation, our installers carefully adjusted the location of the outdoor unit.
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Winter protection : The installation was carried out with sufficient clearance from the ground and the facade, anticipating the accumulation of snow and ice.
These precautions not only ensure the durability of the equipment, but also constant performance, summer and winter.
Results for the client
Following this installation, the owner now benefits from four-season comfort , a significant reduction in energy consumption and a reliable HVAC heating and air conditioning system for years to come.
This Tosot Inverter heat pump fits perfectly into a Montreal residential setting, while adding value to the property .
Why choose AirGreen for your HVAC projects?
At AirGreen, our expertise in installing wall-mounted and central heat pumps covers the entire Greater Montreal area: Montreal, Laval, Longueuil, the North Shore, and the South Shore . Each project is handled by certified technicians who make it a point of honor to deliver impeccable work, both technically and aesthetically.
We also support our clients in their energy subsidy procedures, in order to optimize their investment while promoting more environmentally friendly consumption.
How it goes, from the first call to the end
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.
And 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.
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.
Which type of equipment for your project?
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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).