An HVAC Installation in Montreal North Where the Precision of the Wall Penetration Made All the Difference
In Montreal North, AirGreen completed a residential HVAC installation that perfectly illustrates the practical challenges of a DoubleZone heat pump project in an existing home. The system installed: a GREE FREE MATCH R32, configured with 2 zones and 2 wall-mounted units, to offer independent comfort in two areas of the residence, while maintaining a single outdoor unit.
The project photo shows one of the wall-mounted units installed above a door frame, in a white room, with a temporary technical opening to the right of the unit. This detail is important: it reveals part of the work that often remains invisible once the finishing is complete. In a multi-zone installation, the positioning of an indoor unit is never chosen at random. It is necessary to contend with wood studs, available passage spaces, duct angles, condensate drainage, air jet orientation, and the possibility of neatly connecting the unit to the refrigeration network leading to the outdoor unit.
In this case, the space above the doorway allowed for effective air diffusion into the room but required meticulous execution. Vertical clearance was limited by the ceiling, and the passage to the right had to be carefully prepared to ensure a reliable connection without compromising the final finish. It is precisely in this type of situation that an experienced team makes the difference: the result does not only depend on the quality of the heat pump, but on how it is integrated into the building.
Why the GREE FREE MATCH R32 was a suitable choice for this DoubleZone installation
The GREE FREE MATCH R32 is a particularly relevant multi-zone solution for homeowners who want to manage multiple spaces with a single outdoor unit. In Montreal North, this 2-zone – 2-head configuration met a very clear need: to improve comfort in two distinct areas of the house, without having to install two separate systems.
A DoubleZone heat pump allows two rooms or two areas to be treated according to their actual needs. In Montreal homes, it is common to find rooms that do not react to temperature in the same way: a bedroom more exposed to the sun, a space above a garage, a less ventilated interior room, a floor that accumulates more heat, or a section of the house far from the central heating system. In these cases, a single wall-mounted unit can sometimes be insufficient to achieve uniform comfort.
With the GREE FREE MATCH R32, AirGreen was able to offer a more flexible solution: each indoor unit can operate according to the demand of its zone, which contributes to better temperature stability and smarter energy use.
A 2-zone configuration to better distribute comfort
The main advantage of a DoubleZone system is the ability to distribute comfort where it is truly needed. In this Montreal North residence, the goal was not simply to add a wall-mounted air conditioner, but to install a complete solution capable of cooling in summer and heating during cooler periods.
This configuration offers several advantages:
- Two separately controlled zones, to adapt the temperature according to room usage.
- A single outdoor unit, which limits clutter on the facade, yard, or side of the house.
- Better energy consumption management, since each zone can operate according to its needs.
- A discreet solution, especially when line passages are well planned.
- A modern R32 system, compatible with new generations of HVAC equipment.
- Installation flexibility, particularly useful in existing homes where duct paths are not always straightforward.
For homeowners in Montreal, Laval, Longueuil, the North Shore, and the South Shore, this type of system often represents an excellent compromise between performance, comfort, aesthetics, and budget.
The challenge visible in the photo: integrating the head above an opening
One of the specific features of this installation is the positioning of the wall-mounted unit above a door frame. This configuration is common in projects where available walls are limited or when air diffusion needs to be optimized in a room without encroaching on storage spaces, windows, or furniture.
However, this type of location requires particular attention. A wall-mounted unit must have enough space to draw air from above, blow correctly into the room, and allow access to filters for HVAC maintenance. If installed too close to the ceiling, it can lose efficiency or become more difficult to maintain. If poorly centered or improperly leveled, condensate drainage can become problematic.
In this installation, the unit was placed to meet these constraints while maintaining a clean appearance. The temporary opening to the right of the unit indicates the connection work needed to route refrigerant lines, drain, and wiring. Once the finishing is complete, this type of passage is usually closed or protected by a suitable molding, depending on the wall configuration.
Line routing: a technical step that influences durability
In a multi-zone HVAC installation, line routing is one of the most important steps. Refrigerant lines must be installed with adequate curvature, sufficient protection, and appropriate insulation. The drain must be positioned to allow reliable flow. Communication cables must be connected correctly, as they ensure communication between the indoor unit and the outdoor unit.
In the case of a GREE FREE MATCH R32 DoubleZone, this coordination is even more important, as two indoor units are connected to the same outdoor unit. Line lengths, height differences, and the overall layout must be considered before installation.
At AirGreen, we pay particular attention to these elements:
- the cleanest and shortest path possible;
- protection of pipes against friction;
- insulation of lines to prevent losses and condensation;
- the slope of the drain;
- future access for inspection;
- interior and exterior finishing;
- compliance of refrigerant and electrical connections.
An installation that appears simple on the surface can hide several important technical decisions. This project in Montreal North is a good example.
R32: a modern refrigerant for a current heat pump
The GREE FREE MATCH R32 uses R32 refrigerant, which is increasingly present in new ranges of heat pumps and wall-mounted air conditioners. For homeowners comparing different systems, this mention is important because it reflects the evolution of HVAC equipment towards newer and more efficient solutions.
Installing an R32 system also requires adequate technical expertise. Connection, vacuuming, leak testing, and commissioning methods must be rigorously followed. At AirGreen, our installations are carried out by qualified technicians who understand the specific requirements of this equipment.
This point is essential: a system that performs well on paper can yield poor results if improperly installed. Conversely, a well-planned installation allows the equipment to deliver its full potential.
An installation designed for daily comfort, not just for the technical specifications
In this home in Montreal North, the client was looking for a practical solution to improve daily comfort. A technical data sheet can indicate capacity, refrigerant type, and system options, but the real result is measured in actual use: more stable temperature, quiet operation, better air distribution, zone control, and reduction of seasonal discomforts.
A DoubleZone heat pump is particularly useful when occupants do not use all rooms in the same way. One zone may be used during the day, another mainly in the evening. A bedroom may require a different setting than a living space. A room above a garage or near an exterior wall may require more heating in winter. Thanks to the two wall-mounted units, the system can meet these needs with greater precision.
Main steps of the work carried out by AirGreen
For this installation, our team followed a rigorous method, adapted to the existing configuration of the house.
Analysis of interior locations
Before installing the wall-mounted units, we evaluated the available walls, air diffusion direction, duct access, and final appearance. The positioning above the opening was validated based on available clearance and the necessary technical passage.
Preparation of the wall passage
The visible opening to the right of the unit shows the preparation step necessary to access the connection path. This work must be done cleanly, without unnecessarily weakening the structure or creating a passage difficult to close.
Installation and leveling of the wall-mounted unit
The indoor unit must be perfectly aligned. Improper leveling can cause water drainage problems, especially in cooling mode when the unit produces condensate.
Refrigerant and electrical connection
Pipes, cables, and drains were connected according to system requirements. This step requires precision and cleanliness, as it directly influences the reliability of the heat pump.
Vacuuming and verification
Before commissioning, the circuit must be properly prepared. Vacuuming and checks protect the compressor, prevent moisture in the circuit, and ensure stable operation.
Commissioning of the two zones
Each head was tested separately to confirm communication with the outdoor unit, response to commands, airflow, and overall proper operation.
Mistakes to avoid in a DoubleZone installation
A project like this clearly shows why a multi-zone HVAC installation should not be improvised. Several errors can reduce performance or create problems after a few weeks of use.
The most frequent errors are:
- choosing a system without evaluating the actual load of the rooms;
- placing a wall-mounted unit too close to the ceiling;
- neglecting the direction of the air jet;
- forgetting filter access;
- routing lines in a difficult-to-protect location;
- installing a drain with insufficient slope;
- poorly coordinating line lengths between zones;
- choosing an outdoor unit poorly located for maintenance;
- neglecting interior finishing after drilling.
At AirGreen, we know that these details determine the final quality of the project. A clean, durable, and high-performing installation begins with good planning.
A relevant solution for Montreal North homes
Montreal North presents a great diversity of residences: single-family homes, duplexes, triplexes, buildings with successive renovations, added or reconfigured rooms, spaces with lower ceilings, load-bearing walls, stairwells, and sometimes complex configurations. In this context, a standard HVAC solution is not always sufficient.
The GREE FREE MATCH R32 DoubleZone adapts to several scenarios. It is particularly suitable when two sectors need to be treated efficiently, but the owner wants to avoid two outdoor units. For residences where outdoor space is limited or when facade aesthetics are important, this advantage is considerable.
AirGreen: local expertise in Greater Montreal
AirGreen carries out installations of heat pumps, wall-mounted air conditioners, and multi-zone systems throughout Greater Montreal. Our field experience covers Montreal, Laval, Longueuil, the North Shore, and the South Shore, with a wide variety of residential and commercial projects.
This experience allows us to quickly recognize typical building constraints: difficult access, complex line routing, co-ownership, facade preservation, electrical constraints, limited space for the outdoor unit, or the need for precise zoning. In each case, our objective remains the same: to offer a well-sized, well-installed, and durable solution.
HVAC maintenance: preserving performance after installation
After the installation of a DoubleZone heat pump, HVAC maintenance plays an important role. The filters of the wall-mounted units must be cleaned regularly, especially during periods of heavy use. Periodic professional maintenance allows for checking drains, coils, connections, and the overall condition of the system.
We notably recommend:
- cleaning filters according to use;
- keeping air outlets clear;
- avoiding constantly changing temperature settings;
- checking that the drain flows correctly;
- keeping the outdoor unit free of snow, leaves, or debris;
- scheduling preventive maintenance with a qualified team.
Proper maintenance extends equipment life and helps maintain stable performance.
A GREE FREE MATCH R32 Dual-Zone Installation That Meets Real-World Needs
This installation of a GREE FREE MATCH R32 Dual-Zone heat pump in Montreal-North demonstrates the importance of a professional approach in multi-zone projects. The positioning of the wall unit above the opening, the visible technical passage to the right of the unit, the coordination of the lines, and the need for a clean finish all show that every detail matters.
For homeowners considering an HVAC installation in Montreal, Laval, Longueuil, on the North Shore, or the South Shore, this project illustrates a crucial reality: the performance of a heat pump depends as much on the choice of model as on the quality of the installation. With the GREE FREE MATCH R32, AirGreen delivered a modern, flexible, and house-adapted solution, with two well-designed comfort zones and meticulous technical execution.