Installation of a Tosot Lomo 23 Wall-Mounted Heat Pump in Châteauguay
Experience comfort with the Tosot Lomo 23 heat pump—efficient, quiet, and perfectly integrated into your home by AirGreen.
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.
Efficiency and Comfort Redefined
When it comes to providing comfort and efficiency, few installations tell a story like the one we completed in Châteauguay, featuring the Tosot Lomo 23 Wall-Mounted Heat Pump. This high-efficiency unit not only exemplifies cutting-edge technology but also showcases the dedication and craftsmanship of AirGreen's expert team.
Setting the Scene
In the tranquil suburb of Châteauguay, a family sought a solution to combat the sweltering summer heat and the biting cold of Quebec winters without the high energy costs often associated with heating and cooling systems. Enter the Tosot Lomo 23, a model renowned for its superior efficiency and quiet operation. With a 22.0 SEER efficiency rating and a capacity to deliver cooling and heating at 12,000 BTU, this system was an ideal fit for their needs.
Installation Challenges and Triumphs
The installation posed unique challenges, particularly due to the structure of the family's residence. The indoor unit needed to be placed in a position that maximized airflow without disrupting the aesthetic integrity of the living space. Our team expertly mounted the sleek indoor unit above the television in the main living area, ensuring it blended seamlessly with the room's decor while providing optimal air distribution.
For the outdoor unit, considerations had to be made regarding the compact design and noise levels. Tosot's promise of a 54 dB(A) sound pressure level for the exterior unit meant we could install it close to living spaces without worrying about noise. The smart defrost system and two-stage inverter technology ensure the unit operates efficiently even at -25°C, crucial for our chilly winters.
Technological Advancements for Enhanced Comfort
The Tosot Lomo 23 is not just about heating and cooling; it's about creating a tailored environment suited to the preferences of its users. With features like microprocessor-controlled defrosting and memory function that automatically restores previous settings after a power outage, it promises convenience and ease of use. Its self-diagnosis system simplifies maintenance by displaying error codes for quick troubleshooting.
Beyond Standard Features
What sets the Lomo 23 apart is not just its technical specifications but its user-centric innovations. The model includes Gree's two-stage inverter technology, which adjusts compressor activity, reducing energy consumption while maintaining ideal temperature levels. The indoor unit's reduced size and elegant design complement any room, while its 29 dB(A) interior sound pressure level ensures it never becomes a nuisance.
Customer Satisfaction and Energy Savings
The homeowners were thrilled with the installation. Not only did the heat pump provide a significant improvement in their home comfort, it also qualified for a $385 LogisVert Grant by Hydro-Québec, affirming its energy efficiency and sustainability. The 10-year warranty on both compressor and parts provided additional peace of mind.
Why Choose AirGreen?
Choosing AirGreen means opting for a partner that not only installs but thoroughly understands the dynamics of home comfort. Our commitment to quality, efficiency, and customer satisfaction stands behind every unit we install, ensuring that each project is a testament to our dedication.
With every installation, we aim to deliver not just a product but a lasting experience that enhances home comfort year-round. Our team’s expertise in handling high-efficiency wall-mounted heat pumps like the Tosot Lomo 23 allows us to address individual needs while ensuring environmental responsibility and operational excellence.
Conclusion
The installation of the Tosot Lomo 23 in Châteauguay is more than just another project completed; it is a representation of AirGreen's commitment to enhancing the quality of life through innovative climate control solutions. For those residing in Montreal, Laval, Longueuil, and the North and South Shores, AirGreen remains your trusted provider for sophisticated, reliable, and efficient HVAC solutions.
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.
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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).