Installation of a Tosot LomoPlus UltraHeat Wall-Mounted Heat Pump in Châteauguay
Discover how our installation of the Tosot LomoPlus UltraHeat brings efficient cooling and heating to Châteauguay, even at -30°C. See why this system is a smart, eco-friendly choice!
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.
Efficient Heating and Cooling for Every Season: Installation of the Tosot LomoPlus UltraHeat in Châteauguay
Unmatched Performance for Extreme Climates – A Closer Look at Our Latest HVAC Installation
In our latest installation project, we equipped a home in Châteauguay with the Tosot LomoPlus UltraHeat wall-mounted heat pump. This model, known for its impressive 18,000 BTU capacity and advanced features, is a true powerhouse in both cooling and heating, tailored to meet the demands of Québec’s harsh climate. As an HVAC company dedicated to providing high-quality installations in Montreal, Laval, Longueuil, North Shore, and South Shore, we take pride in each project, ensuring our clients experience comfort year-round.
Project Overview: Installation Details and Background
For this particular installation, the client was seeking a versatile system that could deliver cooling relief during the summer and efficient heating even in the depth of winter. The Tosot LomoPlus UltraHeat was the ideal choice, as it boasts a heating capacity down to -30°C, ensuring reliable warmth during Québec’s coldest days. Its Energy Star® certification, along with the availability of the $1,704 LogisVert Grant by Hydro-Québec, made it a smart investment, both environmentally and financially.
Why the Tosot LomoPlus UltraHeat is the Perfect Fit
The Tosot LomoPlus UltraHeat model offers a combination of energy efficiency and power, with a 24.5 SEER rating that places it among the top performers in the market. Here’s a breakdown of its key features and benefits:
- Cooling Capacity: 18,000 BTU, providing robust cooling for larger spaces.
- Heating Capacity: Designed to function efficiently at outdoor temperatures as low as -30°C.
- Energy Efficiency: With a SEER of 24.5, this model is engineered for optimal energy use, saving costs over time.
- WiFi Control: Equipped with WiFi capabilities, allowing users to control settings from their smartphone.
- Sound Levels: Low operational noise, with an exterior sound pressure level of 59.0 dB(A) and an interior range of 34 to 51 dB(A), ensuring quiet comfort.
Advanced Features that Enhance Comfort and Efficiency
1. Intelligent Defrost System
The Tosot LomoPlus UltraHeat is equipped with a microprocessor-controlled defrosting system, which activates only when needed, reducing energy waste and maximizing efficiency. This intelligent defrost function is crucial in a climate like ours, where temperatures fluctuate and frost can impact performance.
2. I Feel Technology – Personalized Comfort Control
With the I Feel technology, this unit senses temperature variations directly from the remote control, adjusting settings to maintain the ideal comfort level. This feature not only provides precision but also contributes to energy savings by avoiding overuse.
3. Turbo Mode for Rapid Temperature Control
Need a quick blast of cold air or a fast warm-up on chilly days? The Turbo mode boosts airflow temporarily, helping reach the desired temperature swiftly, making it perfect for sudden weather changes that are common in Montréal and surrounding regions.
4. Two-Stage Compressor for Extreme Efficiency
The two-stage compressor of the Tosot LomoPlus UltraHeat is engineered by GREE, ensuring maximum efficiency and reliability. This design optimizes energy use, allowing the system to operate smoothly even during extreme cold, reducing strain on the unit and enhancing its lifespan.
Installation Highlights: Precision and Professionalism at Every Step
For this installation in Châteauguay, our team meticulously planned and executed the setup to ensure optimal performance and aesthetic integration. The indoor unit, measuring 43.3 x 9.8 x 12.8 inches, was positioned to distribute air evenly across the living space. The exterior unit, with dimensions of 38.5 x 16.8 x 31.1 inches, was installed in a sheltered location to protect it from the elements while ensuring efficient operation.
Why Professional Installation Matters
Proper installation is essential to maximize the lifespan and efficiency of any HVAC system. Our certified technicians ensure that each component, from the 1/4 - 5/8 inch piping to the R-410A refrigerant, is correctly fitted and tested. We also calibrate the 220V voltage setup, verify AHRI standards compliance (AHRI: 10062020), and fine-tune the I Feel function to adapt to the client’s specific needs.
Key Benefits of the Tosot LomoPlus UltraHeat
Quiet Operation for Uninterrupted Comfort
This model operates quietly, a significant benefit for homeowners who value peace. With an interior sound level of only 34 - 51 dB(A), it’s perfect for bedrooms, living rooms, and other areas where noise can disrupt comfort.
Energy Star® Certified – Eco-Friendly and Cost-Effective
Being Energy Star® certified, the Tosot LomoPlus UltraHeat is designed for high efficiency, reducing electricity costs. Additionally, the system's eco-friendly R-410A refrigerant aligns with modern environmental standards, supporting our commitment to sustainable practices.
LogisVert Grant by Hydro-Québec – Financial Savings for a Green Choice
One of the unique aspects of this installation is that it qualifies for the LogisVert Grant by Hydro-Québec, providing a $1,704 rebate. This grant encourages homeowners to choose energy-efficient solutions, making this model even more appealing by reducing the upfront cost.
Long-Term Reliability with an Extended Warranty
Tosot backs this model with a 10-year warranty on parts and compressor, which can be extended to cover labor as well, offering peace of mind to homeowners. This extended warranty reflects the brand's confidence in its product’s durability and our commitment to delivering reliable HVAC solutions.
Why Choose AirGreen for Your HVAC Needs?
At AirGreen, we don’t just install HVAC systems; we offer a partnership in creating a comfortable, efficient, and sustainable home environment. Our expertise extends across a wide range of models and brands, and our dedication to quality is evident in every project we undertake. With our experience in the Greater Montréal Area, including Laval, Longueuil, North Shore, and South Shore, we understand the unique climate challenges of our region and tailor each installation accordingly.
Contact Us Today for Your HVAC Solution
If you’re considering an HVAC upgrade, let our team help you find the best system to meet your needs. The Tosot LomoPlus UltraHeat is just one example of the high-performance options we offer. Contact us today to learn more about this model and other energy-efficient 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).