Installation of a Tosot Lomo 23 Wall-Mounted Heat Pump in Longueuil, South Shore
Navigating tight spaces and unique challenges, AirGreen delivers a masterclass in HVAC installation with the Tosot Lomo 23 in Longueuil. Dive in to discover the art of precision!
- City
- Region
- Equipment
- Brand
- Challenges
- Published
The job on one screen
The article, chapter by chapter
The Challenge of Perfect Placement: A Tale of Precision and Expertise
The Setting: Longueuil's Unique Spaces
Nestled in the heart of Longueuil, South Shore, our latest project presented a unique challenge. The apartment, with its limited space and adjoining house, demanded a level of precision and creativity that only the AirGreen team could deliver.
The Machine: Tosot Lomo 23 Wall-Mounted Heat Pump
- Brand: Tosot
- Model: Lomo 23
- Cooling Capacity: 12,000 BTU
- Heating Capacity: -25°C
- Dimensions (Interior): 33.4 x 8.2 x 11.4
- Dimensions (Exterior): 33.4 x 12.6 x 23.6
- Energy Star®: Yes
- AHRI: 9108746
- Efficiency: 22.0 SEER
- Warranty: 10-10-10 (Compressor - Parts - Labor)
- Voltage: 220V
- Sound Pressure Level (Exterior): 54.0 dB(A)
- Sound Pressure Level (Interior): 29 / 45 dB(A)
- Gas (Freon): R-410A
Navigating the Installation Maze
The apartment's layout posed a series of challenges. With one side adjoining another house, it immediately ruled out a whole side for installation. The front and one side of the house were also non-starters. With no balcony in sight, the back of the house emerged as the only viable option.
However, this wasn't a straightforward task. The compressor's placement at the back meant pulling pipes through two rooms, concealing them seamlessly within walls and ceilings. But the AirGreen team thrives on such challenges.
The Perfect Solution: Blending Functionality with Aesthetics
The head unit found its home next to the laundry, a strategic placement ensuring optimal air distribution throughout the apartment. This location also allowed for the drain pipe to be integrated directly into the laundry drain system. This decision eliminated the need for a larger drain pipe with a potentially unreliable drain pump.
The result? A silent, efficient system that not only cools and heats the apartment effectively but also blends seamlessly with its surroundings. The machine's impressive 22.0 SEER efficiency and Energy Star® certification ensure optimal performance without compromising on energy consumption.
Grants and Savings: Maximizing Value
Our customers not only benefit from a top-notch installation but also from significant savings. The Tosot Lomo 23 model is eligible for:
- Federal Grant: $2,500 / $5,000
- Provincial Grant: $385
These grants, combined with the machine's energy efficiency, translate to long-term savings for our clients.
Why Choose AirGreen?
This installation story underscores our commitment to delivering tailored solutions. Our team's expertise in navigating complex challenges ensures that every installation is not just about placing a machine but about enhancing living spaces. With the Tosot Lomo 23 Wall-Mounted Heat Pump, our customer in Longueuil now enjoys a comfortable, efficient, and aesthetically pleasing solution.
In Conclusion
Every project tells a story. In Longueuil, it was a tale of overcoming spatial challenges, understanding customer needs, and delivering a solution that was both functional and elegant. At AirGreen, we don't just install machines; we craft experiences. And with the Tosot Lomo 23, we've added another successful chapter to our story.
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.
More jobs to see, near you
By town, by equipment or by region: browse more than 4,700 published projects.
Each dot: a town where AirGreen has published projects. The glowing dot: this job.
An on-site estimate, the right capacity, the right equipment.
The on-site estimate is free and the quote follows within 24 hours.
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).