Installation of a Tosot Lomo 23 Mini Split in Dollard-des-Ormeaux, Montreal
Facing sleepless nights due to a hot master bedroom? Dive into our recent installation story and see how the right HVAC choice can make all the difference!
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.
The Perfect Solution for a Cool Night's Sleep
In the heart of Dollard-des-Ormeaux, Montreal, a homeowner faced a common dilemma. The master bedroom, their sanctuary after a long day, was uncomfortably warm during the summer months. While the rest of the house enjoyed the luxury of a robust heating and air conditioning system, this room remained a hot spot, making restful nights a distant dream.
Why a Heat Pump Over an Air Conditioner?
Our team at AirGreen was approached with a straightforward request: an air conditioner installation for this pesky bedroom. However, we pride ourselves on offering not just solutions, but the best solutions. We recommended a heat pump, specifically the Mini Split version. Here's why:
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Cost-Effective: While the initial cost might be slightly higher (around $50-$100 more), the heat pump qualifies for government grants. This means not only do you recoup the extra cost, but you also end up saving in the long run.
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Dual Functionality: A heat pump doesn't just cool; it heats as well. So, you're essentially getting two machines for the price of one.
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Grants Galore: The Tosot Lomo 23 is eligible for a Federal Grant of up to $5,000 and a Provincial Grant of $340. That's a substantial saving!
Why the Tosot Lomo 23 was the Perfect Choice
Our client had specific requirements: a top-notch machine from a reputable brand, a comprehensive 10-year warranty, and most importantly, silence. They didn't want their peaceful nights disturbed by the hum of machinery. Enter the Tosot Lomo 23. Here's what makes it stand out:
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Cooling and Heating Capacity: With a cooling capacity of 9,000 BTU and the ability to heat even at -25°C, this machine is a powerhouse.
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Silent Operation: With an interior sound pressure level of just 29/43 dB(A) and an exterior level of 53.0 dB(A), it's whisper-quiet.
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Efficiency: Boasting an efficiency of 23.0 SEER, it's designed to be energy-saving.
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Warranty: A comprehensive 10-10-10 warranty ensures peace of mind for a decade.
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Eco-Friendly: Uses R-410A gas, ensuring a reduced carbon footprint.
The AirGreen Installation Experience
Our client was thrilled with the recommendation, but the real test was the installation. At AirGreen, we understand that an efficient machine is only as good as its installation. Our team ensured:
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Clean Installation: No unsightly pipes or wires. Everything was tucked away neatly.
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Professional Guidance: We walked the homeowner through the machine's features, ensuring they knew how to get the best out of their new heat pump.
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Competitive Pricing: Quality doesn't always have to come at a premium. Our client was pleasantly surprised by our quote.
In Conclusion
The homeowner's reaction post-installation? Absolute delight. The Tosot Lomo 23 was the perfect solution, and our clean, professional installation ensured they got the best out of their new system. Another satisfied customer added to the AirGreen family!
If you're in Montreal, Laval, Longueuil, North Shore, or South Shore and are looking for HVAC solutions that are tailored to your needs, look no further. AirGreen is here to help. Check out our website for more details of installations we've done and let us help you find your perfect HVAC solution.
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).