Installation of a Tosot LomoPlus UltraHeat DoubleZone Heat Pump in Verdun, Montreal
Find out why Verdun homeowners are choosing the Tosot LomoPlus for their heating needs—quiet, efficient, and perfectly installed!
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 Seamless Blend of Efficiency and Silence
Nestled in the vibrant neighborhood of Verdun, Montreal, a recent installation by AirGreen not only underscores our commitment to quality but also showcases our knack for meeting unique customer demands. This installation story isn't just about placing a machine; it's about enhancing comfort and embracing technology.
Project Overview
Client Needs and Installation Challenges
Our latest project involved a sophisticated setup for a discerning client who prioritized efficiency and quiet operation above all. The choice fell on the Tosot LomoPlus UltraHeat, a unit renowned for its whisper-quiet operation and robust performance. The installation posed a unique challenge—mounting the compressor on the rooftop, a task that demands precision and expert knowledge.
Technical Brilliance of the Tosot LomoPlus UltraHeat
Key Features:
- Model: LomoPlus UltraHeat
- Type: DoubleZone Heat Pump
- Capacity: 24 000 BTU with dual 12 000 BTU indoor units
- Efficiency: 23.0 SEER
- Sound Pressure Level: Impressively low at 60.0 dB(A)
This model is not just any heat pump; it's a testament to the technological prowess of Tosot. Equipped with a two-stage compressor and the ability to efficiently heat even at temperatures as low as -30°C, the LomoPlus UltraHeat stands out for its capability to deliver uninterrupted comfort during Canada’s harsh winters.
Smart Features for Enhanced Comfort:
- Wireless Connectivity: Adjust settings via smartphone, adding a layer of convenience.
- Energy Star® Certified: Ensuring high energy efficiency and lower electricity bills.
- Intelligent Defrost System: Minimizes energy use and maximizes heating efficiency.
Custom Installation Solutions
The installation required not just technical expertise but also a creative touch to ensure that the compressor's rooftop position didn’t compromise the aesthetic or functional integrity of the property. Our team accomplished this with finesse, ensuring that the unit was securely installed while maintaining the home’s visual appeal.
Client Feedback:
The homeowner was thrilled with the outcome. The installation process was thorough, with no shortcuts taken, reflecting AirGreen’s commitment to quality and customer satisfaction. The client appreciated the great deal on this high-end heat pump and was particularly impressed by the quiet operation, which was a major requirement.
Why Choose AirGreen?
Commitment to Excellence
At AirGreen, each installation is more than just setting up a machine; it’s about creating environments that offer GUARANTEED COMFORT from the blazing summer heat to the biting winter cold. We are not just providers; we are partners in enhancing your home comfort.
Trusted Professionals
One out of every three wall units sold worldwide is a testament to the trust and reliability customers place in our products. Our installation team is highly trained, ensuring that every setup is done right the first time.
End-to-End Service
From the initial consultation to the final installation check, we ensure that every step is handled with professionalism and attention to detail, making the entire process seamless and stress-free for our clients.
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.
More jobs to see, near you
By town, by equipment or by region: browse more than 4,700 published projects.
Each dot: a town where AirGreen has published projects. The glowing dot: this job.
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).