An HVAC installation in Montreal designed for a narrow and heavily used outdoor space
In Montreal, our AirGreen team carried out the installation of a GREE FREE MATCH R32 DoubleZone heat pump, configured with 2 zones and 2 wall heads, in a typically Montreal environment: a restricted backyard, an existing outdoor structure, basement door access, a balcony above the unit, and masonry surfaces to respect. This type of project requires much more than just equipment installation. It is necessary to work with the available space, circulation around the door, the clearances needed for the outdoor unit, the routing of refrigerant lines, and building protection.
The project photo shows a GREE Inverter outdoor unit installed on wall mounts, directly fixed to an exterior wall. The equipment is positioned near a service door, under a balcony structure, and close to a brick wall. In a context like this, the goal is twofold: deliver a reliable and efficient HVAC installation, while maintaining practical access to the door, good airflow in front of the fan, and a clean integration in an already busy space.
The choice of a GREE FREE MATCH R32 DoubleZone was particularly relevant for this building. A single outdoor unit serves two indoor zones, avoiding cluttering the yard with two separate devices. For many owners in Montreal, Laval, Longueuil, the North Shore, and the South Shore, this multizone configuration is a very interesting option when improving comfort in two rooms or two levels without multiplying outdoor equipment.
A wall-mounted outdoor unit to preserve floor space
In several Montreal buildings, floor space is limited. Backyards are often used for circulation, storage, basement access, emergency exits, or building maintenance. Installing an outdoor unit directly on the ground is therefore not always ideal. In this project, wall installation on metal supports frees up the lower space while keeping the equipment at a practical height.
This approach offers several concrete advantages:
- it protects the unit against certain snow accumulations on the ground;
- it prevents blocking the passage near the door;
- it reduces clutter in a narrow courtyard;
- it facilitates cleaning around the equipment;
- it allows for a cleaner installation when the ground is not perfectly suited for a slab or ground support.
The location visible in the photo was carefully chosen. The unit had to be sufficiently clear to operate properly, while remaining compact enough in its integration not to hinder movement around the door. The front fan must be able to expel air freely, without immediate obstacles in front of the grille. This is an essential point to maintain system efficiency and avoid air circulation problems.
The constraints of a Montréal courtyard: brick, concrete, balcony, and restricted access
Installations in Montréal often present particular constraints. Buildings are sometimes close together, exterior walls combine concrete, brick, and old structures, and technical access is not always simple. Here, the outdoor unit is installed in a space where several elements had to be considered: the balcony above, the door to the right, the metal structure, the adjacent wall, as well as the clearances necessary for maintenance.
Before fixing the supports, our team evaluated:
- the solidity of the anchoring surface;
- the optimal height of the unit;
- the clearance in front of the fan;
- the position of the door and its opening;
- the future access for technicians;
- the protection of refrigerant lines;
- the reduction of vibrations transmitted to the building;
- the visual integration in the courtyard.
A wall installation should never be improvised. The supports must be firmly anchored, aligned, and adapted to the weight of the equipment. The unit must remain stable during operating cycles, including heating, when outdoor conditions are more demanding.
Why the GREE FREE MATCH R32 is well suited for DoubleZone projects
The GREE FREE MATCH R32 is a multi-zone solution designed to connect several indoor units to a single outdoor unit. In this project, the DoubleZone 2 heads configuration allows for managing two distinct spaces in the home, with better comfort distribution than a single-zone system.
A single wall head can sometimes be enough in a very open area. But in Montreal homes, interior divisions, corridors, stairs, closed rooms, and differences in sun exposure often make comfort harder to balance. A DoubleZone heat pump better addresses these variations.
The refrigerant R32 is also an important aspect of this range. It is used in several recent heating and air conditioning units, notably to meet new HVAC market requirements. Combined with Inverter technology, it allows the unit to modulate its operation according to actual demand, rather than operating only in distinct on-off cycles.
For the client, this translates into more stable comfort, better adaptation to the needs of the two zones, and a more pleasant daily use.
A clean, durable, and building-adapted technical installation
This project clearly shows the importance of fieldwork in a heat pump installation. The choice of model matters, but the quality of the result also depends on the installation, support, alignment, line routing, electricity, commissioning, and future access for HVAC maintenance.
Wall mounts: stability and vibration reduction
The GREE outdoor unit is installed on metal wall mounts. This type of support is common in urban projects, but it must be installed methodically. The goal is to hold the unit securely, limit vibrations, and preserve the building.
Our technicians pay special attention to several elements:
- choice of anchors according to the type of wall;
- level of the unit;
- spacing between supports;
- support points under the unit;
- use of antivibration elements when required;
- clearance under the unit;
- access to service panels.
In the photo, you can see that the unit is well cleared from the floor and installed at a height that allows for a free zone under the equipment. In a yard where every square foot counts, this decision has a direct impact on the functionality of the space.
Routing refrigeration lines in a tight environment
A DoubleZone heat pump involves a more complex connection than a single-zone system. Refrigerant lines, communication cables, drainage, and power supply must be planned coherently. In a confined environment like this, the lines must be protected, organized, and installed without obstructing access.
The presence of a door right next to the unit requires extra attention. Paths that could be snagged, damaged, or exposed to repeated movements must be avoided. Transitions between outside and inside must be sealed, clean, and durable.
At AirGreen, we always aim for a clear installation. This means that technical elements must be easy to inspect, well secured, and logically arranged. A clean installation is not only more aesthetic: it also simplifies future maintenance.
Special attention to air circulation
The operation of an outdoor unit strongly depends on its ability to breathe properly. The fan must be able to expel air without obstruction. If the device is too enclosed, too close to a wall, or poorly oriented, its performance can decrease and its operation can become less stable.
In this project in Montreal, the unit was installed in a space partially enclosed by walls, a door, an overhead structure, and a traffic area. The positioning therefore had to consider frontal clearance, distance from neighboring surfaces, and access for cleaning.
This type of decision is part of field expertise. A unit may seem well placed at first glance, but an experienced technician will also assess air behavior, seasonal constraints, snow, ice, leaves, dust, and long-term access.
Two indoor zones for better distributed comfort
The 2-head configuration allows the customer to manage two independent zones. In a Montreal home, this approach can make a big difference. One head can serve a common area, while the other can be installed in a bedroom, an office, an upper floor, or a room that is harder to heat or cool.
This flexibility allows:
- to avoid significant temperature differences between rooms;
- to adjust the temperature according to actual use;
- to reduce dependence on a single wall unit;
- to improve comfort during hot periods;
- to offer more targeted heating during the cold seasons;
- to better manage rooms exposed to the sun or less well ventilated.
A good wall-mounted heat pump must be designed according to the real life of the occupants. The goal is not just to reach a temperature on a remote control but to make spaces comfortable where people live, work, and sleep.
Mistakes to avoid in an installation like this
Urban projects with wall-mounted outdoor units require special attention. Several errors can reduce durability or complicate system use.
Among the mistakes to avoid:
-
Installing the unit too close to an obstacle
This can harm air discharge and reduce the heat pump’s efficiency. -
Neglecting the strength of the supports
A wall unit must be securely anchored, especially when the wall combines several materials or shows signs of aging. -
Blocking access to a door or passage
The installation must respect the daily use of the yard and building access. -
Poorly protecting refrigerant lines
Exposed or poorly secured lines can wear out prematurely. -
Forgetting future maintenance
Service panels, grilles, connections, and electrical components must remain accessible. -
Choosing a single-zone system when the home requires two zones
A poor configuration choice can create permanent discomfort in certain rooms.
In this installation in Montréal, these points were taken into account from the project planning stage.
Subsidies and eligibility: validation according to the installed combination
For multi-zone systems like the GREE FREE MATCH R32, eligibility for subsidies depends on the exact combination installed: outdoor unit, indoor units, capacity, declared performance, and criteria in effect at the time of installation. It is therefore important not to rely solely on the brand name or the fact that it is a heat pump.
At AirGreen, we provide the necessary information to help the customer prepare their file when the system is eligible. The invoice, exact models, and technical documents can be essential to complete an application. This step is particularly important for owners in Montréal, Laval, Longueuil, the North Shore, and the South Shore who compare several options before choosing their HVAC contractor.
Commissioning and final checks
Once the equipment is installed, commissioning confirms that the system operates correctly. For a DoubleZone heat pump, this step includes checking the two indoor heads, the connections, communication with the outdoor unit, and the overall system behavior.
Our technicians specifically check:
- the start-up of the outdoor unit;
- the response of the wall-mounted heads;
- the operation of heating and cooling modes according to conditions;
- the absence of abnormal noise or vibration;
- the quality of the connections;
- the drainage of the indoor units;
- the clearances around the outdoor unit;
- the final cleanliness of the site.
This rigor allows delivering an installation ready to be used, with stable operation and a neat presentation.
An AirGreen installation adapted to the realities of Montreal
This installation of a GREE FREE MATCH R32 DoubleZone heat pump in Montreal perfectly illustrates the challenges of HVAC projects in urban environments: limited spaces, existing walls, restricted access, outdoor structures, aesthetic requirements, and the need for comfort distributed across multiple zones.
The result is a solid, clean, and functional installation. The outdoor unit is wall-mounted on supports, freeing up floor space and maintaining practical access around the door. The DoubleZone system serves two indoor spaces with a single outdoor unit, which reduces clutter while improving comfort quality.
At AirGreen, we carry out this type of project throughout the region: Montreal, Laval, Longueuil, North Shore and South Shore. Each building imposes its own constraints, and our role is to transform these constraints into a coherent, durable, and easy-to-maintain installation.
A good HVAC installation is recognized by its precision: the chosen location, the stability of the support, the quality of the connections, respect for the existing space, and the system's ability to meet the client's real needs. In this Montreal project, the GREE FREE MATCH R32 was installed to offer exactly that: two comfort zones, a better-preserved yard, and a solution designed to last.