Installation of a Tosot Lomo 23 Wall-Mounted Heat Pump in Saint-Léonard
Learn about our recent installation of the Tosot Lomo 23 Heat Pump in Saint-Léonard. This high-efficiency unit offers excellent performance and significant energy savings.
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 Perfect Blend of Efficiency and Elegance
At AirGreen, we pride ourselves on delivering top-notch HVAC solutions that cater to the unique needs of our customers. Recently, we had the pleasure of completing an installation of the Tosot Lomo 23 Wall-Mounted Heat Pump in Saint-Léonard, a charming borough of Montreal. This installation stands out not only for the advanced technology of the unit but also for the seamless integration into the home’s aesthetic.
The Tosot Lomo 23: A Smart Choice
The Tosot Lomo 23 is a high-efficiency, wall-mounted heat pump that promises both superior cooling and heating performance. With a capacity of 12,000 BTU, it’s perfectly suited for residential applications, providing comfortable temperatures year-round. Here’s what makes this model a standout choice:
- Efficiency: With a 22.0 SEER (Seasonal Energy Efficiency Ratio), the Lomo 23 is designed to deliver excellent energy savings.
- Heating Capability: This unit performs reliably even in extreme cold, maintaining up to 80% heating capacity at outdoor temperatures as low as -25°C.
- Quiet Operation: The sound pressure levels are impressively low, at 54.0 dB(A) for the exterior unit and between 29 and 45 dB(A) for the interior unit, ensuring a quiet indoor environment.
- Smart Features: The Lomo 23 includes intelligent defrosting and memory functions, which enhance its performance and ease of use.
The Installation Process
Our team of skilled technicians approached this installation with precision and care, ensuring every detail was meticulously handled. Here’s a closer look at the process:
Initial Assessment
Before beginning the installation, we conducted a thorough assessment of the property. This step is crucial for determining the optimal placement of both the indoor and outdoor units to maximize efficiency and aesthetic appeal.
Installation Details
- Location: The outdoor unit was securely mounted on the exterior wall, using a sturdy bracket to ensure stability. The placement allows for adequate airflow and easy access for maintenance.
- Piping and Wiring: We used high-quality 1/4 - 1/2 inch pipes and ensured all electrical connections were safely and efficiently made, with the unit operating on 220V.
- Freon Gas: The unit is charged with R-410A refrigerant, known for its lower environmental impact and high efficiency.
- Dimensions: The compact design of the units (interior: 33.4 x 8.2 x 11.4 inches; exterior: 33.4 x 12.6 x 23.6 inches) made the installation straightforward without compromising the home’s aesthetic.
Final Touches
To complete the installation, we conducted a series of tests to ensure everything was functioning correctly. This included checking the cooling and heating performance, verifying the sound levels, and ensuring the smart features were operating as expected.
Customer Satisfaction
Our client in Saint-Léonard was particularly pleased with the installation’s efficiency and the unit’s quiet operation. The Tosot Lomo 23 not only enhanced the comfort of their home but also provided peace of mind with its 10-year warranty on both the compressor and parts.
Benefits of Choosing AirGreen
Choosing AirGreen for your HVAC needs comes with numerous benefits:
- Expertise: Our technicians are highly trained and experienced in handling a wide range of HVAC installations.
- Quality Products: We only use top-quality products like the Tosot Lomo 23, ensuring long-term satisfaction and reliability.
- Customer Service: We prioritize our customers’ needs, offering personalized solutions and exceptional support.
Grants and Incentives
An added advantage of the Tosot Lomo 23 is its eligibility for the LogisVert Grant by Hydro-Québec, which offers a $385 rebate. This makes the investment in a high-efficiency heat pump even more attractive, providing significant savings on energy costs.
Why the Tosot Lomo 23 Stands Out
The Tosot Lomo 23 is more than just a heat pump; it’s a commitment to quality, efficiency, and comfort. Here are some of its standout features:
- Smart Defrost: The unit’s microprocessor-controlled defrosting only activates when necessary, optimizing energy use.
- Memory Function: Automatically restores previous settings after a power outage, ensuring seamless operation.
- Compact Design: The reduced size of both indoor and outdoor units allows for easy installation in various settings.
- Self-Diagnosis: The unit’s electronic control system displays error codes, simplifying maintenance and troubleshooting.
Our Commitment to Excellence
At AirGreen, we are dedicated to providing HVAC solutions that meet the highest standards of quality and efficiency. Our recent installation in Saint-Léonard is a testament to our commitment to excellence and customer satisfaction. Whether it’s a sweltering summer or a freezing winter, you can rely on AirGreen and the Tosot Lomo 23 to keep your home comfortable year-round.
For more information about our services or to schedule a consultation, please visit our website or contact us directly. Experience the difference with AirGreen – your trusted partner in HVAC solutions.
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).