Installation of a Tosot Lomo 23 Wall-Mounted Heat Pump in Dorval
See how AirGreen masterfully installed the Tosot Lomo 23 in Dorval, turning HVAC installation into an art form of comfort, efficiency, and customer delight.
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The job on one screen
The article, chapter by chapter
A Seamless Symphony of Comfort and Efficiency
In the charming borough of Dorval, AirGreen, a leading HVAC company in Montréal, has once again demonstrated its unparalleled expertise in enhancing home comfort with the latest installation of a Tosot Lomo 23 wall-mounted heat pump. This project not only showcases our commitment to delivering top-notch HVAC solutions across Montreal, Laval, Longueuil, North Shore, and South Shore but also highlights the exceptional capabilities of the Tosot Lomo 23 model—a true testament to innovation in the realm of heating and cooling.
Project Overview: A Closer Look at Excellence
Easy Installation with Maximum Impact
Embarking on this project, we were greeted with an opportunity that many HVAC professionals dream of—an easy installation with a significant impact on the customer’s comfort and energy efficiency. The stars aligned perfectly in Dorval, allowing us to install the indoor unit of the Tosot Lomo 23 on the very same wall as its outdoor counterpart. This strategic positioning meant that the airflow was optimally directed to the heart of the apartment, ensuring an even distribution of heating and cooling throughout the space.
Invisible Integration: Aesthetic and Functional Brilliance
What made this installation stand out was our ability to seamlessly integrate the system into the customer’s living space. By ingeniously concealing both the pipes and electrical wires behind the indoor unit, we eliminated the need for any post-installation work. No plastering, no painting—just a sleek, unobtrusive addition to the room that blends functionality with aesthetics. This meticulous attention to detail resulted in another highly satisfied customer, who was particularly impressed with the professional and clean execution of the project.
Spotlight on the Tosot Lomo 23: A Marvel of Modern HVAC Technology
Efficiency and Eco-Friendliness at Its Core
The Tosot Lomo 23 is not just any heat pump; it's a beacon of energy efficiency, boasting an impressive 20.0 SEER rating. This model is Energy Star® certified, reflecting its low environmental impact and cost-saving potential. With the added option of WiFi connectivity, users can effortlessly control their home climate, ensuring comfort is always within reach.
Designed for Durability and Peace of Mind
Equipped with a robust 10-year warranty for both the compressor and parts, and an optional extended warranty, the Tosot Lomo 23 offers homeowners long-term peace of mind. Its operational efficacy is further demonstrated by its AHRI certification (9108747) and its capability to provide consistent heating down to -25°C, making it an ideal choice for the Canadian climate.
Quiet Operation for Uninterrupted Comfort
One of the most notable features of the Tosot Lomo 23 is its whisper-quiet operation. With sound pressure levels of 55 dB(A) outdoors and as low as 39 dB(A) indoors, this heat pump ensures that your home remains a serene sanctuary, undisturbed by the mechanical hum that often accompanies less sophisticated models.
Why AirGreen? The Preferred Choice for HVAC Excellence
At AirGreen, we pride ourselves on not just meeting but exceeding our clients’ expectations. Our recent installation in Dorval is a prime example of our commitment to providing high-quality, efficient, and aesthetically pleasing HVAC solutions. Our team of certified professionals ensures that each project is executed with the highest standards of professionalism and technical proficiency, making us the go-to choice for HVAC services in the region.
In Conclusion: A Testament to Innovation and Customer Satisfaction
The successful installation of the Tosot Lomo 23 wall-mounted heat pump in Dorval by AirGreen is more than just another project completed. It's a testament to our dedication to innovation, customer satisfaction, and the pursuit of excellence in the HVAC industry. With each installation, we aim not just to provide a service but to enhance the comfort and quality of life for our clients, making their homes havens of comfort and efficiency.
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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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).