Installation of a Tosot wall-mounted heat pump in a condo in Saint-Laurent
AirGreen installed a Tosot wall-mounted heat pump in a condo in Saint-Laurent. A high-performance, aesthetically pleasing, and subsidized HVAC solution for Montreal and the surrounding area.
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.
Four-season comfort and energy efficiency in a modern residential space
At AirGreen , we know that a successful HVAC installation depends not only on the choice of brand, but also on the adaptation of the equipment to the residential environment. Recently, our team completed the installation of a Tosot wall-mounted heat pump in a condo located in Saint-Laurent , a booming real estate sector on the island of Montreal. The objective was clear: to provide optimal comfort in both summer and winter, while respecting the architectural constraints of a condominium.
Why choose a Tosot wall-mounted heat pump?
The Tosot brand, recognized for its reliability and proven technology, is increasingly establishing itself as an effective solution for condos and apartments in Greater Montreal. Its notable advantages include:
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High energy efficiency , allowing to significantly reduce electricity bills;
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Heating performance down to -25°C , ideal for winters in Montreal, Laval and the North Shore;
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Quiet operation , essential for small spaces;
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Sleek design , which fits perfectly into modern interiors.
Details of the installation in the condo
The indoor unit was installed above a patio door , a strategic position allowing for even distribution of air throughout the room. This configuration required great precision to meet the following constraints:
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Discreet drilling of the exterior wall for the passage of refrigeration connections;
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Short and direct piping routes to optimize energy efficiency;
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Careful integration of wiring and capping to preserve interior aesthetics;
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Use of a gravity drain rather than a condensate pump, thanks to the favorable location.
The external compressor was installed on a secure platform, reducing vibrations and facilitating future maintenance.
Challenges and solutions provided by AirGreen
Each installation has its own specific features. In this project, our technicians addressed two main challenges:
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The proximity of the patio door and curtains : to avoid any discomfort and ensure optimal air circulation, we have adjusted the alignment of the wall unit and provided reinforced fixing.
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Condominium restrictions : Condominium regulations often require maximum discretion for outdoor installations. We therefore chose a location that respected both the standards and the visual harmony of the building.
An investment eligible for subsidies
Tosot wall-mounted heat pumps meet the criteria of several financial assistance programs, including LogisVert Hydro-Québec and the federal Greener Homes program. Our Saint-Laurent customers were able to significantly reduce their installation costs thanks to these subsidies, while enjoying a rapid return on investment through energy savings.
Results and customer satisfaction
The end result provides this condo with four-season comfort perfectly suited to the region's climate. Owners benefit from a stable temperature, improved indoor air quality, and a system that blends discreetly into their living space. Their feedback is unequivocal: investing in a Tosot wall-mounted heat pump is a wise choice for condominiums in Greater Montreal.
Why entrust your project to AirGreen?
At AirGreen, we don't just install appliances: we offer a comprehensive approach that takes into account your needs, the constraints of your space and the possibilities offered by grant programs. Our teams specialize in the installation of wall-mounted and multi-zone heat pumps , in Montreal, Laval, Longueuil, on the North Shore and on the South Shore .
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).