In the Mercier–Hochelaga-Maisonneuve residential neighbourhood of Montreal, we recently installed a Gree multi-zone wall-mounted heat pump in a typical single-family home. The client wanted to completely modernize their comfort: efficient air conditioning in several rooms during the summer, effective heating in the winter, while also reducing their electricity bill compared to their existing baseboard heaters.
Context of the house and challenges of the project
The property includes:
-
of a compact backyard ,
-
of a plaster/concrete wall directly overlooking the passageway,
-
of a slightly sloping plot of land with gravel and soil,
-
vegetation and shrubs providing partial shade.
The available space was therefore limited for accommodating the outdoor unit. We had to:
-
maintain adequate clearance around the condenser ,
-
protect the heat pump from snow and ice in winter,
-
to avoid vibrations and noise for occupants and neighbors,
-
optimize the routing of refrigeration lines to the various indoor wall-mounted units.
Choosing a Gree multi-zone wall-mounted heat pump
For this project, we recommended a Gree multi-zone wall-mounted heat pump with modern refrigerant (Multi R32 type), capable of powering several indoor units from a single outdoor condenser.
This choice offers several advantages:
-
A single outdoor block rather than several units lined up in the courtyard.
-
Up to three independent zones : living room, bedrooms and/or basement, depending on the client's needs.
-
Gree inverter technology ensures fine power modulation, ideal for Montreal's climate.
-
Excellent energy efficiency, both in air conditioning and heating, allowing substantial savings on the electricity bill.
The Gree brand is known for the reliability of its wall-mounted heat pumps, their quiet operation and their compatibility with Quebec winters when the models are chosen and sized correctly.
Details of the outdoor installation
In the photo, you can clearly see:
-
the Gree condenser installed along the wall of the house,
-
an elevated steel structure resting on four concrete blocks,
-
Anti-vibration feet to limit noise transmission,
-
insulated refrigeration lines that run neatly up the wall.
1. Elevated support for winter
Instead of placing the unit directly on the ground, we installed it on a raised galvanized steel stand . This approach allows for:
-
to keep the heat pump well above the layer of snow that accumulates in winter,
-
to reduce the risks of corrosion and water infiltration ,
-
to facilitate the manual removal of snow around the device,
-
to ensure better air circulation, even during storms.
Each leg of the support rests on a stable concrete block, which distributes the weight and prevents the structure from sinking into the ground with freezing and thawing.
2. Vibration and noise management
To ensure quiet operation, we used:
-
anti-vibration mounts between the structure and the Gree unit,
-
precise tightening of the support to avoid any resonance,
-
a calculated positioning so that the noise is directed towards the garden area rather than towards the windows of the house or those of the neighbors.
Result: even when the heat pump is running at a higher speed in very hot or very cold weather, the noise level remains very discreet .
3. Routing of multi-zone refrigeration lines
On the right of the image, you can see a bundle of insulated pipes leading from the condenser to the various wall-mounted units inside. For a multi-zone system, each zone has its own circuit:
-
We have grouped these circuits into a neatly attached bundle .
-
We took care to limit overly tight bends to preserve performance.
-
The whole thing is fixed to the wall in such a way as to withstand wind, snow and temperature variations.
Inside, the Gree wall-mounted heads are strategically placed to serve the most frequently used rooms in the house:
-
a unit in the living room for the main living area,
-
One or two units with bedrooms for optimal comfort at night.
-
possibly an additional area in the basement or office, depending on the client's needs.
Summer and winter performance in Mercier–Hochelaga-Maisonneuve
The neighborhood experiences hot, humid summers with periods of intense heat, and harsh winters that can reach -20°C or lower. The installed Gree multi-zone heat pump is designed to:
-
to provide fast and uniform air conditioning of rooms, even in direct sunlight;
-
to ensure efficient heating at low temperatures , limiting the need for baseboards;
-
precisely modulate the power to maintain a stable indoor temperature without unpleasant fluctuations.
The occupants thus benefit from:
-
four-season comfort ,
-
with better circulated and more homogeneous air ,
-
reduced electricity bills thanks to the high efficiency of inverter technology.
Aesthetics and integration into the courtyard
Even though the courtyard is relatively small, the installation was designed to:
-
occupy as little floor space as possible ,
-
maintain a clear passage for maintenance and traffic,
-
to allow the presence of vegetation and accessories (lawnmower, tools, etc.) without affecting the operation of the heat pump.
The Gree unit, in a neutral color, blends well with the light-colored plastered wall. The shrub branches create a light shade, which can help limit direct sunlight while ensuring sufficient space for ventilation.
Recommended maintenance for the Gree heat pump
To ensure the longevity of the installation, we advise our clients:
-
to remove the snow accumulated under and around the condenser in winter;
-
to check that nothing obstructs the air intake and exhaust (branches, leaves, objects);
-
to have the filters of the indoor units cleaned several times per season;
-
to plan for regular professional maintenance (inspection, coil cleaning, refrigerant check, etc.).
This preventative approach helps to maintain optimal performance and limit the risk of breakdowns, especially during periods of high demand (heat waves or extreme cold).
AirGreen: your partner for Gree multi-zone systems in Montreal
This project in Mercier–Hochelaga-Maisonneuve perfectly illustrates our expertise in the installation of Gree multi-zone wall-mounted heat pumps :
-
analysis of the building and the courtyard,
-
selecting the right device and the right size,
-
Careful installation on a raised support.
-
vibration, noise and aesthetic management,
-
comprehensive support for owners on use and maintenance.
If you are considering installing a Gree wall-mounted heat pump , whether it is a simple or multi-zone system, our team travels throughout Greater Montreal to offer you a solution tailored to your home, your budget and your comfort.