Installation of a Tosot Lomo 23 Mini Split in Rosemont–La Petite-Patrie, Montreal
A strategic installation atop a staircase, a thrilled customer, and the power-packed Tosot Lomo 23. Join us on this HVAC journey with AirGreen!
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 Strategic and Stunning Installation That Left Our Customer Thrilled
The Challenge: A Strategic Spot on the Staircase
Every installation comes with its own set of unique challenges and requirements. In the heart of Rosemont–La Petite-Patrie, our latest project was no exception. Our customer had a specific vision: a powerful heat pump installed strategically atop a staircase. The goal? To efficiently channel air to both the second floor and the main floor below. They already had a heat pump serving the first floor, but it was time to amplify the cooling and heating prowess for their home.
Why the Tosot Lomo 23?
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Cooling and Heating Capacity: With a robust 18,000 BTU cooling capacity, the Tosot Lomo 23 is designed to deliver. Even in the biting cold of -25°C, this machine doesn’t falter, ensuring warmth and comfort.
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Dimensions: The interior unit, with dimensions of 38.2 x 8.8 x 11.8, and the exterior unit, measuring 37.6 x 12.6 x 27.6, seamlessly fit into the home's aesthetics without being obtrusive.
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Silent Operation: With sound pressure levels of 55.0 dB(A) for the exterior and a range of 39 to 47 dB(A) for the interior, the Tosot Lomo 23 ensures tranquility isn't compromised.
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Connectivity and Efficiency: WiFi inclusion means smart control. Coupled with an impressive 20.0 SEER efficiency and the Energy Star® certification, it's both smart and eco-friendly.
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Warranty: A 10-year warranty on everything - from compressor to parts to labor. It's not just a machine; it's a decade-long promise.
The Installation Journey
Our team, always up for a challenge, began the installation process. The location atop the staircase was tricky, but nothing we hadn’t tackled before. The customer's emphasis was clear: no visible pipes or electric wires. They wanted a clean, professional finish, and we were determined to deliver.
As we progressed, it became evident why the Tosot Lomo 23 was the perfect choice. Its sleek design and powerful performance were exactly what the space needed. And when we finally switched it on, the results spoke for themselves. The air flowed seamlessly, reaching every nook and corner of both floors.
Grants and Savings
One of the highlights of choosing the Tosot Lomo 23 is the financial benefits it brings:
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Federal Grant: Eligibility for a grant ranging from $2,500 to $5,000.
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Provincial Grant: An additional $620 to cushion your investment.
A Happy Ending to Another Installation Tale
The final result was nothing short of stunning. Our customer was over the moon, not just with the machine's performance but also with the aesthetics. The Tosot Lomo 23, with its 10-year comprehensive warranty, ultra-silent operation, and impressive grants, was the cherry on top.
Another very satisfied customer, another feather in AirGreen's cap. Whether it's Montreal, Laval, Longueuil, North Shore, or South Shore, our commitment remains the same: top-notch HVAC services that leave our customers smiling.
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.
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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?
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The outdoor unit is covered in ice: is that normal?
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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).