Installation of a Gree and Tosot wall-mounted heat pump in Ahuntsic-Cartierville
Gree and Tosot heat pump installation in Ahuntsic-Cartierville. AirGreen provides sustainable and efficient HVAC installation for duplexes in Montreal and the surrounding area.
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.
An installation adapted to the realities of Montreal plexes
In Ahuntsic-Cartierville, a neighborhood where red brick buildings are common, our team recently completed an HVAC installation combining two separate wall-mounted units: a Gree heat pump and a Tosot heat pump . The project involved a duplex whose occupants wanted to optimize their comfort while allowing each unit to be energy independent.
This installation clearly illustrates AirGreen's expertise when it comes to integrating multiple pieces of equipment on the same façade, while respecting both technical standards and the aesthetics of the building.
Technical characteristics of the installed units
The two machines chosen are compact wall-mounted heat pumps from different brands:
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Gree , recognized for its high energy efficiency units, often eligible for Quebec subsidies when they achieve Energy Star certified performance.
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Tosot , a brand part of the Gree group, offering excellent reliability and perfect compatibility for small residential areas.
Installed power (exact BTUs not visible) are suitable for typical residential needs, easily covering living areas of 500 to 1200 sq ft depending on insulation and housing configuration.
Challenges of installing on brick facades
The installation of two stacked condensers on the same exterior wall presented several challenges:
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Wall mounting : the use of sturdy brackets allows the weight of both devices to be supported while freeing up floor space.
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Working height : assembly required careful planning to ensure the safety of the technicians, particularly for the upper unit.
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Refrigerant pipe routing : the pipes were neatly grouped, secured and protected by discreet capping hoods, ensuring both greater durability and a neat finish.
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Condensate management : each unit has been connected independently, promoting gravity drainage and avoiding any risk of water returning.
An ideal solution for a Montreal duplex
In this project, the Gree + Tosot combination ensures:
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Balanced thermal comfort in winter and summer.
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Optimized energy consumption, reducing dependence on traditional electric heating.
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The possibility of clear billing between accommodations, each unit being independent.
Subsidies and long-term savings
Gree and Tosot heat pumps, when installed in Greater Montreal, may be eligible for various financial assistance programs (including LogisVert or other provincial/federal programs) if they meet energy performance criteria. Our team always assists customers in these efforts, simplifying access to available grants.
Why choose AirGreen for an HVAC installation in Ahuntsic-Cartierville
At AirGreen , we don't just install machines: we adapt our solutions to the architectural and technical realities of each building. In this specific case, the integration of the two wall-mounted heat pumps was designed to:
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Minimize the visual impact on the facade.
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Optimize the energy performance of equipment.
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Ensure sustainability through an installation that meets the highest standards in the HVAC industry.
Our technicians, specialized in the installation of wall-mounted heat pumps in Montreal, Laval, Longueuil, as well as on the North Shore and the South Shore, always offer a complete service, combining advice, expertise and after-sales support.
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).