An HVAC installation designed to correct heat zones in an atypical residential space
In Saint-Constant, on the South Shore, our AirGreen team recently completed the installation of a DoubleZone heat pump GREE FREE MATCH R32, consisting of two wall units connected to a single outdoor unit. This type of project is particularly interesting because it meets a very common need in houses, condos, and partially open-plan apartments: achieving uniform comfort in multiple rooms without unnecessarily multiplying outdoor equipment.
In this installation, one of the wall units was positioned in a room with a very distinctive decor, featuring an orange wall, a low ceiling in places, a side opening to another section of the house, and existing furniture. The image clearly shows a common challenge in our wall heat pump projects: it is not enough to choose a free wall. You also have to analyze the available height, the direction of airflow, air circulation, access for piping passage, drain evacuation, future maintenance, and visual integration into the room.
The choice of a GREE FREE MATCH R32 became a logical solution for this type of configuration. The Free Match range allows multiple indoor units to be connected to a single outdoor unit, providing great flexibility for 2 zone projects, while maintaining a clean, discreet installation adapted to the realities of residential buildings on the South Shore, in Montreal, Laval, Longueuil, and surrounding areas.
Why a DoubleZone heat pump was more relevant than a single wall unit
In many homes, a single wall unit can work well when the space is very open. But as soon as there are divisions, corridors, landings, irregular ceilings, bulky furniture, or more enclosed areas, comfort becomes less consistent. One room can quickly reach the desired temperature, while another remains too hot in summer or too cold in winter.
This is exactly the kind of thinking we do before every HVAC installation. A DoubleZone heat pump is not just about “putting two units”. It serves to better distribute comfort according to the building’s reality.
In this project in Saint-Constant, the presence of distinct spaces made the 2 units solution much more interesting. Each unit can work for its respective zone, with more precise temperature control. The client thus obtains better thermal stability, fewer variations between rooms, and a more pleasant daily use.
A well-placed wall unit despite the room's constraints
The wall unit visible in the photo was installed above a clear wall, but with several constraints to consider. The ceiling is relatively close, the opening on the right influences air circulation, and the furniture located under the unit requires consideration of the airflow direction.
Our technicians therefore evaluated several elements before fixing the indoor unit:
- the minimum necessary distance around the wall unit;
- the direction of the airflow to avoid blowing directly on a seating area;
- the possibility of easy access to the filters for HVAC maintenance;
- the strength of the wall and the quality of the anchoring;
- the passage of refrigerant pipes, communication cable, and drain;
- the aesthetic integration into an already furnished room.
This preparation work is essential. A poorly positioned wall unit can create drafts, louder perceived noise, inaccurate temperature readings, or lower efficiency. Conversely, a well-installed unit quickly becomes natural in the space and improves comfort without compromising the layout.
The GREE FREE MATCH R32: a flexible solution for multi-zone installations
The GREE FREE MATCH R32 is a multi-zone solution appreciated in residential projects where you want to air condition and heat several spaces with a single outdoor unit. Its modular approach allows adapting the capacities of the wall-mounted units according to the actual needs of the rooms.
The refrigerant R32 is also an important point. It is increasingly present in modern heating and air conditioning equipment, notably because it allows the design of efficient systems while meeting the new directions of the HVAC market. For an owner who wants to invest in a current, durable installation well suited to Quebec winters, this type of system represents a serious option.
In the case of a DoubleZone system, technical planning is more complex than a single-zone installation. It is necessary to consider:
- acceptable pipe lengths;
- possible height differences between the indoor units and the outdoor unit;
- the positioning of the outdoor unit;
- the approximate thermal load of each zone;
- the actual BTU requirement for each room;
- electrical supply;
- management of condensation drains;
- accessibility for future maintenance.
At AirGreen, we pay special attention to these details because they determine the final quality of a heat pump installation.
A clean installation in an already finished room
One of the most important points in this project was working in an already furnished space. You can see in the photo that the room was not an empty construction site: furniture, sofa, painted wall, baseboards, lighting, and finished surfaces were already in place. In this kind of context, a poorly planned installation can leave visible marks, misaligned ducts, or elements difficult to correct later.
Our team therefore worked with a precise method: space protection, level validation, controlled drilling, careful fixing of the wall plate, clean connection of the head, then complete checks before startup. The goal was simple: deliver a functional, efficient, and visually well-integrated system.
A good HVAC installation in Saint-Constant is not limited to the operation of the machine. It must also respect the client's living space. In this project, the wall head integrates discreetly despite the strong color of the wall, and its location allows effective diffusion towards the main room.
The crucial role of drainage
In wall-mounted installations, the drain is often underestimated. Yet, it plays a major role in system reliability. In air conditioning mode, the indoor unit produces condensation. This water must be properly drained, with an adequate slope or, when the configuration requires it, with a drainage pump.
On this project, as with all our installations, we paid special attention to drainage. A poorly installed drain can cause backflow, dripping, odors, or wall damage. It is one of the most common mistakes in installations done too quickly.
Our technicians always check the drainage during commissioning. This step confirms that water drains properly and that the installation is ready for intensive use during hot periods.
A single outdoor unit for two zones: aesthetic and practical advantage
One of the major advantages of a DoubleZone heat pump is the reduction in the number of outdoor units. Instead of having two separate condensers, the GREE FREE MATCH R32 allows connecting two indoor units to a single outdoor unit. For properties where outdoor space is limited, this is a considerable advantage.
In Saint-Constant, as in several areas of the South Shore, owners often want to preserve the aesthetics of their yard, terrace, or facade. A single well-positioned outdoor unit helps limit clutter, simplify maintenance, and reduce visual impact.
This choice can also facilitate certain projects where condominium rules, distances from neighbors, technical access, or aesthetic preferences are stricter.
Everyday comfort: heating, air conditioning, and zone control
A 2-zone installation offers more personalized comfort. One room may be used more in the evening, while another is occupied during the day. With two wall units, the customer can adjust the temperature according to the actual use of each space.
This flexibility is particularly useful in homes where some rooms are more exposed to the sun, where the basement stays cooler, or when the occupants do not all have the same temperature preferences.
In cooling mode, the diffusion is more balanced. In heating mode, the heads can help stabilize the temperature during cold periods, complementing or partially replacing an existing system depending on the house configuration. The result is more consistent comfort and better control of energy consumption.
Mistakes to avoid in a DoubleZone installation
A multizone system must be installed rigorously. The most common errors we see in the field are often related to poor initial planning.
Among the points to avoid:
-
Installing the heads too close to the ceiling
This can harm air intake and complicate filter maintenance. -
Choosing a capacity that is too high
A unit that is too powerful can quickly reach the requested temperature without properly dehumidifying the air. -
Misorienting the airflow
A head blowing directly on a sofa, bed, or workstation can become uncomfortable. -
Neglecting the drain
A bad slope or poor connection can create water problems. -
Underestimating the complexity of line routing
In a finished house, the discretion of the routing is as important as performance. -
Forgetting future maintenance
A unit that is difficult to access will be less well maintained over time.
In this project in Saint-Constant, these elements were analyzed from the start to achieve a clean, durable, and efficient installation.
An AirGreen approach adapted to South Shore homes
We regularly carry out similar installations in Saint-Constant, Longueuil, Brossard, Candiac, La Prairie, Boucherville and in several other municipalities on the South Shore. Each property has its particularities: ceiling height, load-bearing walls, interior finishes, outdoor access, neighborhood, location of the electrical panel, sun orientation, and the real needs of the occupants.
What distinguishes a good installation is the ability to adapt the solution to the building rather than imposing a standard model. In some cases, a single zone is enough. In others, like here, a GREE FREE MATCH R32 DoubleZone heat pump provides a much more coherent result.
At AirGreen, we always prioritize a recommendation based on the actual use of the home. We look at how the air circulates, how the rooms are used, where the occupants spend the most time, and which areas pose problems in summer or winter.
Subsidies and eligibility: a point to validate according to the exact combination
Subsidy programs, especially those related to efficient equipment, can vary depending on the exact combination installed, model numbers, capacities, certifications, and rules in effect at the time of the project. For a GREE FREE MATCH R32 heat pump, it is therefore essential to validate the precise eligibility of the complete system, not just the brand or range.
During our quotes, we help our customers better understand the necessary information: outdoor model, indoor models, system performance, documentation, and final invoice. This step is important because it avoids unpleasant surprises and allows the customer to make an informed decision.
We always remind that a subsidy must be confirmed according to the official criteria applicable at the time of installation. That is why our approach is transparent: we clearly indicate what can be validated, what depends on the exact combination, and what documents the customer must keep after the work.
Commissioning and final checks
Once the units are installed, commissioning is a key step. It confirms that the system is working properly, that the connections are correct, that the heads communicate well with the outdoor unit, and that the requested temperature is normally reached.
For this installation in Saint-Constant, our technicians checked:
- proper operation of both wall units;
- response to controls;
- airflow stability;
- condensate drainage;
- operation in cooling mode;
- operation in heating mode when conditions allow;
- the absence of abnormal vibration;
- the final cleanliness of the workspace.
These checks are part of our standard method. They are essential to ensure that the customer receives a system ready to use, not just a machine mounted on the wall.
Practical tips for maintaining good performance
After installation, maintenance plays an important role in the system’s durability. A well-maintained wall-mounted heat pump retains better efficiency, provides cleaner air, and reduces the risk of long-term problems.
We especially recommend:
- to clean the filters regularly;
- to keep the space around the units clear;
- to avoid blocking the airflow with tall furniture;
- to monitor any unusual noise;
- to have the system inspected periodically;
- not to wait for a complete breakdown before requesting HVAC maintenance.
In a DoubleZone installation, these tips apply to both units. Even if one zone is less used, it must remain clean and functional.
A discreet, efficient result adapted to the client’s reality
The final result of this installation in Saint-Constant clearly illustrates the goal of a successful HVAC project: improving comfort without unnecessarily altering the living space. The wall unit visible in the photo is installed neatly, in a strategic location, with a discreet visual integration despite a highly personalized interior environment.
The GREE FREE MATCH R32 DoubleZone offers the client a modern, versatile, and better-adapted solution than a single-zone system. It allows cooling and heating of two distinct zones with a single outdoor unit, while providing more control over daily comfort.
For AirGreen, this type of project represents exactly what we aim to do in every installation: choose the right equipment, respect the building, pay attention to technical details, and deliver a reliable solution for years to come.
Whether in Saint-Constant, Montreal, Laval, Longueuil, on the North Shore or on the South Shore, our team supports owners in choosing, installing, and maintaining their heating, ventilation, and air conditioning systems. A good heat pump always starts with a good analysis, and this DoubleZone installation is an excellent example.