Installation of a Tosot wall-mounted heat pump in Outremont
Professional installation of a Tosot 12,000 BTU wall-mounted heat pump in Outremont: comfort, energy efficiency and grants available.
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The job on one screen
The article, chapter by chapter
A project of harmonious integration into a unique architecture
At AirGreen , we recently had the privilege of installing a Tosot wall-mounted heat pump in a residence with a distinctive architectural style in Outremont, Montreal . This home stands out with its wooden cathedral ceilings and angled windows that provide an abundance of natural light. The challenge was to integrate the new unit discreetly and efficiently, while respecting the neat aesthetic of the place.
Choosing the Tosot heat pump
The Tosot brand, distributed in Quebec, is renowned for the reliability and energy efficiency of its wall-mounted units. In this specific case, the client was looking for a unit capable of providing four-season comfort , both to cool the room during summer days and to heat efficiently during Montreal winters. The installed unit, with a capacity of 12,000 BTUs , is perfectly suited for this high-ceilinged living room.
Constraints and technical solutions
The installation took place in a room with sloped ceilings and large glass surfaces, which often poses two challenges:
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Airflow Management – The flow had to cover the space without creating areas that were too cold or too hot. The installation angle of the indoor head was carefully studied to maximize circulation.
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Aesthetic integration – The wall-mounted header was positioned to remain discreet while respecting the room's proportions. The refrigeration lines were carefully camouflaged with matching capping.
Installation details
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Unit type : single-zone wall-mounted heat pump.
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Capacity : 12,000 BTU, ideal for medium-sized open rooms.
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Drilling : crossing the rear wall to quickly connect the external condenser.
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Drainage : gravity drainage, made possible by the height of the room and the natural slope of the pipes.
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Power supply : Secure connection to a dedicated circuit breaker in the main panel.
This configuration allows for a reliable, durable and easy-to-maintain installation.
Performance and customer benefits
The installed Tosot unit is Energy Star certified, making the project eligible for grant programs such as LogisVert and Hydro-Québec. The customer thus benefits from:
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Stable thermal comfort even during Montreal's harsh winters.
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A significant reduction in energy consumption , thanks to the high efficiency of the device.
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An accelerated return on investment thanks to subsidies available on the North Shore, the South Shore, Laval and Montreal.
Testimony and satisfaction
The owner emphasized the importance of maintaining the aesthetics of his interior space. Our team met this challenge by installing the unit with a meticulous finish. The result: elegant visual integration and immediate comfort .
“I wanted an installation that respected the unique design of my home. The AirGreen team was very professional and attentive to detail. I already feel the difference every day.” – Owner, Outremont.
Why choose AirGreen?
Beyond the technical installation, this project perfectly illustrates our commitment to offering:
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Local expertise adapted to the realities of buildings in Montreal and its surrounding areas.
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Personalized advice on model selection, available subsidies and preventative maintenance.
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A complete service , from quote to commissioning and post-installation support.
Conclusion
This installation of a wall-mounted Tosot heat pump in Outremont demonstrates how a well-designed HVAC solution can combine performance, aesthetics, and energy efficiency . At AirGreen, we ensure that each project integrates perfectly with the home and the specific needs of our clients, whether in Montreal, Laval, Longueuil, on 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).