Installation of a Tosot Lomo 23 Wall-Mounted Heat Pump in Montreal
Experience unmatched comfort and efficiency with the Tosot Lomo 23 in Montreal. Tailored installations by AirGreen – your choice for a greener home.
Take a tour of the installation
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.
A Glimpse into High-Efficiency Comfort Solutions
Innovative Installation for Sustainable Living
In the heart of Montreal, a city known for its distinct seasons and architectural charm, the need for efficient and reliable heating and cooling solutions is paramount. AirGreen, a leading HVAC services provider in Montreal, Laval, Longueuil, North Shore, and South Shore, recently completed an exemplary installation of the Tosot Lomo 23 wall-mounted heat pump, showcasing not only the unit's superior capabilities but also our commitment to enhancing comfort with environmentally conscious technology.
Choosing the Right Model: Tosot Lomo 23
The Tosot Lomo 23 model, renowned for its high efficiency, offers a perfect blend of aesthetics and performance. With a 23.0 SEER efficiency rating and the ability to operate effectively in temperatures as low as -25°C, this model stands out as an ideal choice for residential applications. The unit features an AHRI certification (9108745), ensuring that it meets rigorous energy performance standards.
The heat pump's indoor unit dimensions (33.4 x 8.2 x 11.4 inches) and outdoor unit dimensions (33.4 x 12.6 x 21.3 inches) make it compact enough for a discreet installation without compromising the interior design aesthetics. Additionally, the 10-year warranty on both compressor and parts provided by Tosot guarantees long-term reliability and peace of mind for homeowners.
Advanced Features of the Lomo 23
The Lomo 23 is equipped with state-of-the-art features that cater to the modern homeowner’s needs:
- Two-Stage Inverter Technology: This feature allows the pump to maintain consistent temperatures with up to 80% heating capacity even at -25°C, ensuring efficient operation during Montreal’s harsh winters.
- Smart Defrost: Helps in maximizing energy efficiency by only defrosting when necessary, thus reducing overall power consumption.
- Memory Function: Conveniently restores previous settings after a power outage, providing uninterrupted comfort.
- Compact Design: Ensures that both the indoor and outdoor units fit seamlessly within different spaces, ideal for urban homes.
- Self-Diagnosis: Simplifies maintenance by automatically displaying error codes, which helps in quick troubleshooting.
Seamless Integration into a Modern Living Space
The installation process at a residential property in Montreal was meticulously planned to ensure that the unit complements the existing decor. Positioned above the living room door, the indoor unit blends seamlessly with the room’s modern aesthetic, marked by neutral tones and contemporary furnishings. The strategic placement not only optimizes air distribution throughout the space but also maintains the room’s sleek appearance.
Environmental Impact and Energy Savings
Embracing the LogisVert Grant by Hydro-Québec, this installation benefits from a $340 subsidy, reflecting our commitment to promoting sustainable energy solutions. The high SEER rating of the Tosot Lomo 23 significantly lowers electricity consumption, aligning with both homeowner and city-wide goals for reduced carbon footprints.
Why Choose AirGreen?
At AirGreen, we understand that installing a heat pump is a significant investment in your home’s comfort and efficiency. Our team of certified professionals ensures that every installation is executed flawlessly, providing you with a system that not only meets your comfort needs but also contributes to environmental sustainability. Our installations are tailored to each home's unique needs, ensuring optimal performance and aesthetics.
We provide comprehensive post-installation support and maintenance services to keep your system running efficiently year-round. Our dedication to customer satisfaction and our expertise in high-efficiency heating and cooling solutions make us the preferred choice for HVAC services in the Greater Montreal area.
Conclusion
Choosing the right heat pump, like the Tosot Lomo 23, can significantly enhance the comfort of your home while reducing energy costs and environmental impact. With AirGreen, you're choosing a partner dedicated to providing top-quality installation and service that will keep your home comfortable, no matter the season.
The big day, step by step
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 would it look like 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.
Four mistakes we do not make
Flip each card to see what we do instead.
Your own project, step by step
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.
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.
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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Every house has its constraints. We see them before we install.
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).