Installation of a Tosot Lomo 23 Wall-Mounted Heat Pump in Brossard, South Shore
Upgrade to the Tosot Lomo 23—high efficiency with smart features ensures year-round comfort in Brossard. Find out why it’s the choice for savvy homeowners.
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.
Enhancing Comfort with High-Efficiency Heating Solutions
In the charming neighborhood of Brossard on Montreal’s South Shore, a recent HVAC installation by AirGreen has brought state-of-the-art climate control technology to a delighted homeowner. This installation not only enhances home comfort but also aligns with energy efficiency standards, thanks to the innovative Tosot Lomo 23 wall-mounted heat pump.
Project Overview: A Blend of Efficiency and Innovation
The Tosot Lomo 23 model, renowned for its high efficiency and advanced features, was selected for this installation. With a cooling and heating capacity of 9,000 BTU and impressive 23.0 SEER efficiency, the unit stands out in the market for its ability to maintain comfort while minimizing energy use. Here are the project specifics:
- Location: Brossard, South Shore
- Type of Machine: Wall-Mounted Heat Pump
- Brand: Tosot
- Model: Lomo 23
- AHRI Certified Number: 9108745
- Sound Pressure Levels: 29 dB(A) indoor and 53 dB(A) outdoor, ensuring a quiet operation
Key Features of the Tosot Lomo 23
- Superior Energy Efficiency: At 23.0 SEER, the Tosot Lomo 23 operates at a level of efficiency that surpasses many conventional units, making it an environmentally friendly choice.
- Winter-Ready Heating Technology: With a capacity to heat effectively even at -25°C, the unit ensures comfort during harsh Canadian winters. This is facilitated by GREE’s two-stage inverter technology, which maintains up to 80% heating capacity at extremely low temperatures.
- Smart Features for Enhanced Usability: The unit includes microprocessor-controlled defrosting that activates only when necessary, ensuring maximum efficiency and energy savings. Moreover, the memory function automatically restores previous settings following a power outage.
- Compact and Discreet Design: The indoor and outdoor units of the Lomo 23 are designed to be unobtrusive and easy to install, blending seamlessly with the aesthetics of any home.
Installation Challenges and Solutions
The installation of the Tosot Lomo 23 in Brossard presented unique challenges, particularly due to the compact space available on the property. Our team at AirGreen devised a custom solution that involved strategic placement and securing of the outdoor unit on a specially constructed platform to ensure stability and optimal performance. The installation also required precise piping work to maintain the aesthetic integrity of the home while ensuring the system’s efficiency.
Customer Satisfaction and Future Benefits
The homeowner, delighted with the installation, highlighted the immediate improvement in home comfort and the expected reduction in energy bills. The unit’s low sound levels were particularly appreciated, contributing to a peaceful home environment. Additionally, the homeowner is set to benefit from a $340 LogisVert Grant by Hydro-Québec, recognizing the investment in energy-efficient technology.
Why Choose AirGreen for Your HVAC Needs?
AirGreen remains dedicated to providing high-quality, reliable HVAC solutions that cater to the specific needs of our clients. Whether you are looking to upgrade your home’s heating system or need a customized solution for a challenging space, our team of experts is ready to deliver exceptional service and support.
From initial consultation to final installation, we ensure a seamless and satisfying experience for all our clients, backed by the assurance of a 10-year warranty on parts and compressor from Tosot. Trust AirGreen to keep your home comfortable, energy-efficient, and environmentally friendly, no matter the season.
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?
Is it noisy?
The outdoor unit is covered in ice: is that normal?
Does AirGreen hold the required licences?
Is the estimate free?
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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).