Installation of a Gree MultiZone wall-mounted heat pump in Rosemont
AirGreen installs a Gree MultiZone wall-mounted heat pump in Rosemont. Optimized HVAC installation for Montreal duplexes. Services in Montreal, Laval, Longueuil, North Shore, and South Shore.
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 HVAC installation perfectly suited to the configuration of a Montreal duplex
At AirGreen , we understand that every wall-mounted heat pump installation project requires a thorough analysis of the building, its environment, and the needs of its occupants. In Rosemont, a neighborhood where Montreal plexes often feature exterior stairs, balconies, and limited side spaces, optimizing the location of outdoor units is essential.
Our team recently installed a Gree MultiZone heat pump, consisting of two compact outdoor units mounted on wall brackets. This configuration perfectly illustrates AirGreen's expertise in residential HVAC installation in Greater Montreal.
The particularities of the project in Rosemont
Choice of location
The installation is located on the side wall of the duplex, a narrow space overlooking a fenced driveway. This layout presents several challenges:
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limited clearance between walls and fence,
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need to respect the ventilation distances of the units,
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safe working height thanks to the use of a multi-section ladder.
Our technicians chose to install the Gree capacitors on galvanized steel wall brackets , fixed at an adequate height to protect them from winter snow accumulation and optimize air circulation.
Management of refrigeration connections
The connections run discreetly beneath a gray capping that matches the facade, ensuring both aesthetics and protection against the elements. Their length, adjusted to the shortest possible length, reduces energy efficiency losses and facilitates future maintenance.
Drainage and power supply
The drainage is designed using gravity, avoiding the use of a condensate pump. The electrical wiring is integrated into a vertical conduit running along the facade, directly connected to the interior panel, ensuring an installation that complies with Quebec electrical safety standards.
The advantages of a Gree MultiZone heat pump
The Gree MultiZone heat pump chosen by our customers combines performance and adaptability. Here are some highlights:
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Versatility : possibility of connecting several independent indoor units, ideal for a Montreal duplex or triplex.
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Energy efficiency : high coefficients of performance (SEER2 and HSPF2) ensuring significant savings on heating and cooling costs.
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Operation in cold climates : eligible for Quebec subsidies (LogisVert, Hydro-Québec) thanks to its stable performance down to -25°C.
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Quiet operation : optimal acoustic comfort, essential in the narrow streets of Rosemont where proximity between buildings is unavoidable.
Installation process
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Initial analysis : inspection of the facade and planning of the conduit route.
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Fixing the supports : reinforced anchoring of the wall brackets with mechanical sealing.
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Installation of outdoor units : parallel installation, perfectly aligned.
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Passage of refrigeration and electrical connections : aesthetic and safe capping.
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Testing and commissioning : pressure control, operating tests in heating and air conditioning modes, validation of air flow and temperature.
Results for occupants
With this installation, owners now benefit from a complete system that:
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ensures thermal comfort all year round,
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reduces dependence on electric supplementary heating,
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optimizes the resale value of the building,
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improves the overall energy efficiency of the property.
Why choose AirGreen for your HVAC projects in Montreal
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Expertise in the installation of wall-mounted and central heat pumps in complex urban environments.
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Turnkey service including project study, installation, maintenance and support for subsidies.
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Proven experience in all sectors of Greater Montreal: Rosemont, Laval, Longueuil, North Shore and South Shore .
Each project is an opportunity for us to apply our know-how and ensure a durable, aesthetic and efficient installation.
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.
Which type of equipment for your project?
Pick what looks like your need.
Four mistakes we do not make
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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?
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).