In Rosemont–La Petite-Patrie, projects often involve narrow backyards with stone/concrete foundation walls, balconies above, and limited clearance. This installation perfectly fits the context: a Gree multi-zone heat pump (recent generation, vertical outdoor unit with dual fans ) designed to provide reliable heating and stable cooling to several rooms, while respecting the constraints of a typical Montreal residential building.
At AirGreen , our goal is simple: to make comfort “invisible” on a daily basis, thanks to a clean, silent and durable installation — especially when the Quebec winter puts the system to the test.
Why a Gree multi-zone heat pump in this type of dwelling?
In many Rosemont homes (duplexes/triplexes, garden-level apartments, multi-level dwellings), people often look for a solution that:
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efficiently heats more than one area (e.g., living room + bedrooms + finished basement)
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avoids multiplying the outdoor units
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It adapts to an existing building envelope, without major ductwork work.
A multi-zone heat pump perfectly meets this need: a single outdoor unit powers several indoor units (wall-mounted, console, or other configurations depending on the project). And with Gree , the goal is a good balance between performance , reliability , and precise zone control .
The model (consistent with the observed installation)
The photo shows a Gree outdoor unit in a vertical format with two stacked fans , typical of medium to high capacity multi-zone configurations.
➡️ For this project, we are considering a consistent configuration of the type: Gree Multi R32 – up to ~42,000 BTU (2 to 5 zones) , depending on the heating/cooling demand and the number of rooms to be served.
(When the exact reference is not legible on the label, we deliberately stick with a realistic range designation used in residential settings, rather than inventing a serial number.)
Key installation details (what makes a difference on the field)
1) Outdoor unit on wall brackets: a very Montreal choice
Here, the outdoor unit is installed high up on sturdy wall brackets . In a backyard setting and with a foundation, this is often the best solution.
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Protection against snow and ice (accumulation on the ground in winter)
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Reduction of the risk of blockages (snowdrifts, leaves, debris)
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Improved space management (clear passage on the ground)
We also pay attention to the rigidity of the anchors and the distribution of loads , to avoid vibration, resonance and micro-movements over the seasons.
2) Well-insulated refrigeration lines and discreet routing
The insulated refrigeration lines (black foam type) are clearly visible and neatly directed towards the point of entry into the wall. In this type of project, the challenge is twofold:
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maintain efficiency (avoid losses and condensation)
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protect the pipes (UV, friction, impacts)
3) Electricity and safety: accessible disconnection
A service point is visible nearby (connection zone). A professional installation requires:
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a properly placed disconnect switch
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protected and compliant cabling
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a finish that remains easy to maintain, without being “in the way”
4) Ventilation and air circulation: essential in multi-zone systems
With a dual-fan outdoor unit, air circulation is critical. Even in a tight yard, it's essential to maintain:
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air inlet/outlet
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the minimum distance from the wall and obstacles
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realistic maintenance access (which the two stepladders clearly illustrate during the work)
How AirGreen ensures performance (summer + winter)
A multi-zone heat pump performs best when the installation is "calibrated":
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Rigorous vacuuming (to protect the compressor and its lifespan)
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checking for leaks and connections
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Logical configuration of zones (priorities, instructions, actual usage)
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validation of heating and air conditioning operation
In a neighbourhood like Rosemont–La Petite-Patrie, you often see mixed needs: rooms facing the street that get a lot of sun in the summer, cooler areas on the garden level, and reliable heating requirements during periods of extreme cold. Multi-zone heating and cooling makes perfect sense: you heat/cool where and when you need it , without unnecessary overconsumption.
Best practices for the landlord (to avoid common problems)
To maximize the lifespan of your Gree multi-zone heater:
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Keep a clear area around the outdoor unit (leaves, objects, snow)
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Clean/vacuum the filters of the indoor units regularly.
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Avoid "yo-yoing" with the instructions (better comfort = stable instructions)
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Schedule regular maintenance (especially before winter)
Conclusion: a clean, compact, and winter-ready installation for Montreal
This installation in Rosemont–La Petite-Patrie perfectly illustrates our approach: intelligent installation (wall brackets), meticulous finishing , and a coherent Gree multi-zone configuration for true everyday comfort. In a Montreal residential environment where outdoor space is often limited, every detail counts—and that's precisely where a specialized team makes all the difference.