Installation of a Tosot wall-mounted heat pump in Rosemont–La Petite-Patrie
Installation of a Tosot wall-mounted heat pump in Rosemont–La Petite-Patrie by AirGreen, guaranteeing heating, air conditioning and energy savings for homes in Greater Montreal.
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.
An HVAC solution adapted to a bright Montreal apartment
At AirGreen , we know that every HVAC installation project must adapt not only to technical constraints, but also to the occupants' lifestyle. In this home located in Rosemont–La Petite-Patrie , our team installed a Tosot wall-mounted heat pump , perfectly integrated into a bright living space overlooking a typical Montreal interior courtyard with a wrought iron staircase.
Why choose a Tosot wall-mounted heat pump?
The choice of the Tosot brand is explained by several concrete advantages:
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Heating/air conditioning versatility : ideal for tackling Montreal's hot summers and Quebec's harsh winters.
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Sleek design : the interior unit blends in without weighing down the apartment's contemporary decor.
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Digital display : the integrated screen allows clear monitoring of temperature and settings.
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Energy efficiency : several Tosot models have Energy Star certifications and are eligible for grant programs (LogisVert, Chauffez Vert).
Key steps in AirGreen installation
Our technicians have paid particular attention to every detail:
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Optimal location : the wall unit was fixed high up, above the windows, ensuring even air diffusion without disrupting circulation in the room.
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Drilling and routing of refrigerant lines : the pipes were carefully routed to the outside, with discreet capping matching the walls, preserving the interior aesthetics.
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Condensate drainage : carried out by gravity, avoiding the need for an additional pump, which simplifies future maintenance.
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Complete commissioning : heating and air conditioning tests carried out, remote control calibration and refrigeration pressure verification.
Results for occupants
Thanks to this Tosot wall-mounted heat pump installation in Rosemont , occupants now benefit from:
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Four-season comfort , with reliable heating even in very cold weather and efficient air conditioning in summer.
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A significant reduction in energy costs , compared to traditional electric heating.
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Healthier indoor air , with built-in filtration and better air circulation.
The challenges and solutions provided
The installation presented a challenge due to the proximity of the windows and the presence of an exterior metal staircase. Our technicians adapted the conduit layout to minimize visible holes and ensure a safe exterior exit, even in winter conditions (snow and ice).
AirGreen: local HVAC expertise
Based in Montreal, we operate weekly in various neighborhoods such as Laval, Longueuil, the North Shore and the South Shore . Our team ensures fast, durable installations that always comply with RBQ standards. We also assist our clients in finding available grants , maximizing their return on investment.
Recommended maintenance to maximize lifespan
We advise occupants:
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Regular cleaning of filters (every 4 to 6 weeks).
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Annual check by our AirGreen technicians , including complete refrigerant inspection and thorough cleaning.
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Monitoring of the outdoor unit in winter to prevent snow or ice accumulation.
Conclusion
This Tosot wall-mounted heat pump installation project in Rosemont–La Petite-Patrie demonstrates AirGreen's ability to offer HVAC solutions perfectly suited to Montreal apartments. Thanks to careful installation and a wise technological choice, our clients benefit from optimal comfort and lower energy bills, while increasing the value of their property.
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.
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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).