Installation of a TOSOT Ultra Heat Wall-Mounted Heat Pump in Montreal
Explore how AirGreen integrated the high-performance TOSOT Ultra Heat 18,000 BTU heat pump into a stunning Montreal home, blending modern technology with timeless charm.
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 Integration of Comfort and Style in Montreal's Historic Residences
When it comes to battling Montreal's harsh winters and scorching summers, having an efficient HVAC system is no longer a luxury—it's a necessity. Recently, we completed the installation of a TOSOT Ultra Heat 18,000 BTU wall-mounted heat pump in a stunning heritage-style home in Montreal. Not only does this state-of-the-art mini-split system blend seamlessly with the aesthetic of the home, but it also offers unparalleled energy efficiency and reliability in temperatures as low as -30°C.
The Home: A Blend of Tradition and Modernity
The client’s home was a magnificent brick-clad property in the heart of Montreal. With its classic staircase and vintage chandelier, this house presented a unique challenge—integrating modern technology without compromising its traditional charm. The solution? The TOSOT Ultra Heat 18,000 BTU wall-mounted heat pump, a sleek and compact unit designed to merge with any decor while delivering unmatched performance.
The Installation Process
Planning and Preparation
Our process began with a thorough evaluation of the space. The home featured high ceilings, an open staircase, and large windows—ideal for showcasing its charm but challenging for efficient climate control. The TOSOT Ultra Heat, with its high SEER rating of 24.5, was the perfect fit for this environment.
Strategic Placement
The interior unit was installed above the grand staircase, where it would deliver optimal airflow across the entire home. Its dimensions of 43.3 x 9.8 x 12.8 inches allowed it to fit discreetly above the large window without drawing attention away from the home’s architectural beauty.
The outdoor unit, measuring 38.5 x 16.8 x 31.1 inches, was carefully placed on a sturdy base with an integrated heating element to prevent freezing during Montreal’s frigid winters.
Seamless Installation
Using high-quality 1/4 - 5/8 piping and ensuring the system was connected to a reliable 220V power source, our team worked efficiently to minimize disruption to the household. We also ensured the unit’s WiFi functionality was up and running, allowing the client to control the temperature remotely from their smartphone.
Why the TOSOT Ultra Heat is Perfect for Montreal
1. Exceptional Performance in Extreme Cold
Montreal’s winters are infamous, with temperatures often plunging below -20°C. The TOSOT Ultra Heat, with its two-stage compressor and heating capacity at -30°C, is designed to handle these extreme conditions effortlessly. The unit retains up to 80% of its heating capacity in freezing temperatures, ensuring the home stays warm and cozy.
2. Quiet Operation
Living in a peaceful neighborhood, the client appreciated the TOSOT’s low sound pressure levels—just 34/51 dB(A) indoors and 59 dB(A) outdoors. This ensured a tranquil environment both inside and outside the home.
3. Energy Efficiency
With an Energy Star® certification and a remarkable 24.5 SEER efficiency rating, this heat pump is a boon for energy-conscious homeowners. The client can now enjoy lower electricity bills without sacrificing comfort.
4. Eligibility for Hydro-Québec’s LogisVert Grant
This installation qualified for the $1,704 LogisVert Grant, making it a cost-effective choice for the homeowner. We handled all the paperwork, ensuring a hassle-free experience for the client.
Key Features of the TOSOT Ultra Heat 18,000 BTU
- Cooling Capacity: 18,000 BTU
- Heating Capacity: -30°C
- WiFi Control: Manage settings remotely
- Turbo Mode: Rapid temperature adjustment
- Four-Way Motorized Louvers: Maximum airflow for enhanced comfort
- Intelligent Defrost System: Ensures energy savings by defrosting only when needed
- Compact Design: Blends seamlessly with interiors
- Extended Warranty Options: Up to 10 years on parts, labor, and compressor
Customer Feedback
After completing the installation, the client expressed their delight with the performance and design of the unit. They particularly appreciated the Turbo mode, which quickly heats or cools the home during temperature fluctuations. The ability to control the system via their smartphone added a layer of convenience, especially for days when they’re away from home.
Why Choose AirGreen for Your HVAC Needs?
At AirGreen, we pride ourselves on offering personalized solutions tailored to our clients' needs. From initial consultation to post-installation support, our team is committed to delivering excellence. With extensive experience serving Montreal, Laval, Longueuil, and the North and South Shores, we’ve built a reputation for reliability, professionalism, and quality.
Our Expertise Includes:
- Comprehensive HVAC Installations: Mini splits, ductless systems, and central air conditioning
- Energy-Efficient Solutions: Eco-friendly systems eligible for grants and subsidies
- Ongoing Support: Maintenance, repairs, and troubleshooting
A Greener Future with TOSOT and AirGreen
This installation is a testament to the perfect blend of tradition and innovation. By choosing the TOSOT Ultra Heat 18,000 BTU wall-mounted heat pump, the homeowner not only enhanced their comfort but also took a step towards a more sustainable future. At AirGreen, we’re here to help you achieve that balance with HVAC solutions tailored to your needs.
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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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).