Installation of a GREE FREE MATCH R32 Dual-Zone Heat Pump in Dorval: two wall-mounted heads, targeted comfort, and neat HVAC integration
AirGreen installs a GREE FREE MATCH R32 Dual-Zone Heat Pump in Dorval: two wall-mounted units, zone-by-zone comfort, clean integration, and HVAC expertise for Greater Montreal.
In summer, the outdoor unit rejects the house's heat outside.
Generic illustration of this type of installation, not a survey of this job site. Tap a number.
Mounted level on a wall plate, high enough for the air to reach the whole room, with enough space around it to slide the filters out easily.
The refrigerant lines, the communication cable and the drain go through the wall in a single opening, sealed against water, cold air and insects.
Two insulated copper pipes connect the two units. Outside, a line cover can protect them from sun, knocks and weather.
A shut-off switch near the outdoor unit isolates it safely for service. It must stay accessible at all times.
The compressor and the fan. In heating mode it captures heat from the outdoor air, even in winter, and moves it inside.
On the ground or on the wall, it keeps the unit above accumulated snow. The unit stays clear and defrost water can drain away.
The fan needs to blow freely. Storage, a fence or a wall too close, and efficiency drops while noise goes up.
A Dual-Zone Installation Designed for a Dorval Home with Real Space Constraints
Installing a GREE FREE MATCH R32 Dual-Zone Heat Pump in a property in Dorval requires much more than just choosing the equipment. In this project carried out by AirGreen, the objective was clear: to provide stable comfort in two distinct zones of the house, while respecting the building's specific features, available clearances, and interior aesthetics.
The photo of this installation clearly illustrates one of the frequent realities in our residential HVAC projects in Montreal, Laval, Longueuil, on the North Shore and the South Shore: the indoor wall-mounted unit had to be positioned above a door opening, with a relatively low ceiling and limited technical space on the right side. You can also see the opening made in the wall, allowing for the passage of refrigerant lines, communication wiring, and drainage. This type of configuration requires precise planning, as every inch counts.
In this case, the GREE wall unit was placed to optimize air distribution to the main room, without creating uncomfortable drafts directly on occupants. The placement above the door allowed for more useful walls to be freed up for interior design, while ensuring good airflow range. This is a solution we often recommend when the house configuration makes a more central wall installation impossible or undesirable.
The Dual-Zone heat pump installed here relies on GREE FREE MATCH R32 technology, a multi-zone solution designed to power two indoor units from a single outdoor unit. This choice is particularly interesting for homes where two spaces have different needs: for example, a ground floor and a bedroom, a living room and an office, or a main living area and a closed room that is harder to temper.
Why a Dual-Zone solution was relevant for this home
A two-head installation is not just a matter of capacity. It is primarily a matter of control. In a Dorval home, where variations in sunlight, insulation, interior divisions, and room usage can vary greatly from one space to another, a single wall unit can sometimes leave certain areas less comfortable.
With a GREE FREE MATCH R32 heat pump, each indoor unit can cater to a specific zone. This allows for:
- better heat distribution in winter;
- more uniform air conditioning in summer;
- reduced temperature differences between rooms;
- avoiding overheating or overcooling a single zone;
- improved comfort in remote or closed rooms;
- a more discreet solution than a system with two separate outdoor units.
In this project, the Dual-Zone approach also helped limit the visual impact outdoors, as the system uses a single condenser for two indoor units. This logic is often appreciated in residential areas of Dorval, where homeowners want to maintain a clean facade, reduce outdoor clutter, and ensure a durable installation.
The choice of GREE FREE MATCH R32: efficiency, flexibility and multi-zone design
The GREE FREE MATCH R32 range is often chosen for projects where flexibility is essential. The system can be configured with different combinations of indoor units according to the actual needs of the house. In a Dual-Zone installation, this allows adapting the capacity of each unit to the area, orientation and use of each space.
The refrigerant R32 also represents an important element. Compared to older refrigerants used in the HVAC sector, R32 is recognized for its better environmental profile and thermal efficiency. For the client, this translates into a modern system, well adapted to new generations of wall-mounted heat pumps and current market demands.
This type of equipment is designed to provide heating and cooling with intelligent modulation. The compressor adjusts its operation according to actual demand, which helps reduce abrupt on-off cycles. In practice, this promotes more stable comfort, quieter operation, and better controlled consumption.
An indoor unit installed above a door: the details that make the difference
The installation visible in the photo presents several technical peculiarities. A wall-mounted unit placed above a door must be installed rigorously, as the available height is limited and its positioning directly influences performance.
Before fixing the wall plate, our team checks several elements:
- the structure behind the wall;
- clearance from the ceiling;
- the angle of the pipe outlet;
- the possible routing of the drain;
- access for future maintenance;
- the direction of the airflow;
- the possibility of concealing or protecting the pipes;
- electrical and refrigeration compliance.
In this installation, the opening on the right side shows the necessary technical passage. This type of access must be carried out neatly, without compromising the structure and without putting stress on the pipes. The refrigeration lines must follow an adequate bending radius, the drain must maintain an effective slope where possible, and the wiring must be protected according to applicable standards.
A common mistake in this type of project is to position the head too close to the ceiling or too close to an obstruction. This can hinder air intake, reduce the unit's efficiency, and complicate filter maintenance. At AirGreen, we attach great importance to these details, as they influence the actual performance of the system long after the installation day.
The challenge of pipe routing in a confined area
Pipe routing is often the least visible step for the client, but one of the most important for the system's durability. In this GREE FREE MATCH R32 Dual-Zone heat pump installation in Dorval, the available space around the head required precise work to route the lines without forcing connections.
Poor preparation can lead to several problems: vibrations, noise, condensation, insufficient drainage, difficult access for maintenance, or a less clean interior finish. Our team therefore plans the pipe route before the final fastening of the unit. In a Dual-Zone system, this planning is even more important, as two indoor units must be connected to the same outdoor unit, with line lengths, elevation differences, and connections that must comply with the manufacturer's limits.
Vacuum quality, connection tightness, proper tightening, pipe protection, and operational tests are essential. A well-executed HVAC installation is not limited to starting the machine. It must guarantee stable, safe, and efficient operation over time.
An HVAC solution adapted to Dorval, with particular attention to finish and comfort
Dorval features a varied residential housing stock: single-family homes, condos, duplexes, renovated houses, extensions, and buildings with architectural constraints. In several projects, walls are not always perfectly accessible, ceilings can be low, and technical spaces are sometimes limited. It is precisely in these situations that a company specializing in wall-mounted heat pump installation provides real value.
For this installation, the goal was not only to add an air conditioning and heating system. It was necessary to integrate a Dual-Zone solution into an existing space, taking into account daily comfort, interior appearance, and the performance of the refrigeration network.
A clean installation despite a necessary wall opening
The opening visible to the right of the indoor unit demonstrates a normal aspect of many installations: access to the pipe passage. This type of intervention must then be properly closed and finished according to the project context. The priority is first to secure the technical passage, confirm the slope or drainage management, and then complete the finishes in a durable manner.
At AirGreen, we always explain to the client why certain openings are necessary. An overly "quick" installation that tries to avoid any access can sometimes create less optimal pipe routes, overly tight angles, or service difficulties. We prioritize a sustainable approach: create the right passage, protect the components, then provide a clean finish.
In homes in Montreal, Laval, Longueuil, Dorval, on the North Shore and the South Shore, this transparency is highly appreciated. Clients want to understand what is happening within their walls, especially when it comes to a system that needs to operate for many years.
Zone comfort: the tangible advantage of a two-head system
The great strength of a Dual-Zone heat pump is its ability to adapt to the actual habits of occupants. A house is not used uniformly throughout the day. The living room may be occupied in the evening, a bedroom may require more precise comfort at night, and a home office may have different needs in the afternoon.
With two wall-mounted units, the client can better manage each zone. This avoids relying on a single discharge point for the entire house. In many cases, this configuration also improves the perception of comfort: fewer cold spots, fewer abrupt temperature changes, and a more stable temperature where occupants actually spend time.
GREE technology also allows for modulating operation. The system adapts its capacity according to demand, which is particularly relevant in Quebec, where intermediate seasons can create varying needs: light heating in spring, occasional air conditioning in early summer, more sustained heating in autumn, then significant assistance in winter.
What we check before recommending a GREE FREE MATCH R32
Before recommending a GREE FREE MATCH R32, we analyze several on-site elements. The choice of a multi-zone system should never be made solely based on the number of rooms. It must also take into account volumes, insulation, solar orientation, openings, usage habits, and possibilities for pipe routing.
Our technicians evaluate, in particular:
- the actual area of the zones to be heated and air-conditioned;
- sun exposure;
- the presence of large windows;
- ceiling height;
- potential heat loss;
- desired noise level in resting areas;
- the location of the outdoor unit;
- the distance between each indoor unit and the condenser;
- electrical constraints;
- drainage options;
- future access for HVAC maintenance.
This method reduces the risks of oversizing or undersizing. An underpowered unit will run too long without achieving the desired comfort. An overpowered unit can create less efficient cycles, less satisfactory dehumidification, and premature wear. The right solution is the one that matches the actual building, not just a technical specification sheet.
Subsidies and eligibility: what you need to understand
Heat pump systems may be eligible for financial aid programs depending on the models, installed combinations, current requirements, and applicable criteria at the time of application. For a multi-zone solution like the GREE FREE MATCH R32, eligibility generally depends on the precise combination of the outdoor unit and indoor units, as well as recognized certifications and performance ratings.
AirGreen supports its clients by providing the necessary documents after installation, including the detailed invoice and relevant information about the installed equipment. As amounts and criteria may vary, we always recommend validating exact eligibility based on the chosen combination and the applicable program at the time of the project.
This step is important for homeowners in Dorval, but also for those in Montreal, Laval, Longueuil, the North Shore, and the South Shore who wish to optimize their investment without compromising installation quality.
Mistakes to avoid during a Dual-Zone installation
A Dual-Zone heat pump requires more precise coordination than a single-zone installation. Here are some mistakes we sometimes see during replacements or inspections:
Choosing locations based solely on appearance
Aesthetics matter, but they shouldn't compromise performance. An indoor unit installed in a corner that's too enclosed or too close to an obstruction may not distribute air effectively.
Neglecting the drain slope
Poor condensation drainage can cause leaks, odors, or damage. Drainage must be planned from the outset.
Underestimating pipe length
Multi-zone systems have limits on length and elevation. These must be respected to ensure performance and reliability.
Installing without considering maintenance
Filters must remain accessible. The unit must be able to be opened and cleaned properly. An overly cramped installation can become problematic.
Comparing price only
A lower price can hide a less careful finish, insufficient protection materials, a poor capacity choice, or a lack of after-sales service. In HVAC, installation quality directly influences actual performance.
Customer experience in this Dorval project
In this installation, the client wanted an efficient, discreet solution capable of better distributing comfort throughout the house. The location visible in the photo required a meticulous approach: the head had to be perfectly aligned above the opening, the pipe passage had to remain accessible during installation, and the final result had to integrate naturally into the space.
Our team took the time to validate the positioning before final mounting. This type of on-site validation avoids unpleasant surprises. Once the location was confirmed, the steps followed one after another: mounting, drilling, pipe routing, connections, outdoor unit installation, vacuuming, leak tests, start-up, checking heating and cooling modes, then explaining the operation to the client.
The client particularly appreciated the ability to control two zones without multiplying outdoor equipment. This is often one of the main advantages of a GREE FREE MATCH R32 system: a more flexible, visually cleaner solution better suited to homes with multiple comfort needs.
Why AirGreen for an HVAC installation in Dorval
AirGreen regularly works in Dorval and throughout Greater Montreal on projects involving wall-mounted heat pumps, wall-mounted air conditioners, multi-zone systems, and efficient heating solutions. Our field experience allows us to anticipate constraints that are not always visible during a simple phone discussion.
In an installation like this, our value lies in several details:
- choosing the right system for the house;
- positioning each head for optimal distribution;
- respecting clearance constraints;
- protecting the pipes;
- ensuring compliant electrical installation;
- checking sealing and commissioning;
- clearly explaining the operation to the client;
- remaining available after installation.
Every project is different. A house in Dorval doesn't always have the same constraints as a condo in Longueuil, a semi-detached house in Laval, or a property on the North Shore. That's why we favor a personalized approach, based on observation of the building and the practical experience of our teams.
A result designed to last
This GREE FREE MATCH R32 Dual-Zone heat pump installation in Dorval perfectly illustrates the difference between a simple equipment installation and a true HVAC solution. The indoor unit visible in the photo is installed in a challenging but relevant location. Pipe routing was carefully planned, air distribution was considered, and the choice of a Dual-Zone system meets a real need for distributed comfort.
For homeowners considering a heat pump installation in Montreal, Laval, Longueuil, on the North Shore, or the South Shore, this project serves as a crucial reminder: the chosen model matters, but the installation matters just as much. A good heat pump performs at its best only when it is correctly sized, well-positioned, and installed according to best practices.
At AirGreen, we work with this vision: to offer a durable, clean, efficient, and client-adapted solution for daily life. The GREE FREE MATCH R32 installed here in Dorval is an excellent example: two comfort zones, thoughtful integration, and an installation carried out with the technical attention every project deserves.
How it goes, from the first call to the end
The main steps of this kind of job at AirGreen. Every house has its quirks: the estimate brings them out.
We look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
Model, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
Floors and furniture protected, wall plate position marked level, wall opening located.
A single opening, with the slope the drain needs to flow outside.
Set on a stand raised above the snow, with the clearances the manufacturer requires.
Connected, insulated and protected. The opening is then sealed against water, cold air and insects.
A dedicated circuit and an accessible disconnect near the outdoor unit.
Leak test, vacuum, then start-up and a check of heating and cooling.
Remote, modes, filters: we show you the essentials before we leave.
- The on-site estimateWe look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
- The quoteModel, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
- Getting readyFloors and furniture protected, wall plate position marked level, wall opening located.
- The wall openingA single opening, with the slope the drain needs to flow outside.
- The outdoor unitSet on a stand raised above the snow, with the clearances the manufacturer requires.
- Lines, cable and drainConnected, insulated and protected. The opening is then sealed against water, cold air and insects.
- The electrical workA dedicated circuit and an accessible disconnect near the outdoor unit.
- Tests and start-upLeak test, vacuum, then start-up and a check of heating and cooling.
- The walkthroughRemote, modes, filters: we show you the essentials before we leave.
And at your place?
Two quick checks with real numbers: what heat costs, and what your current heaters add up to in BTU/h.
Conversion: 1 W = 3.412 BTU/h. An indication, not a load calculation: baseboards and furnaces are often stronger than the real need, and they can stay as backup. AirGreen confirms the capacity on site.
What to do, season by season
Three habits per season for this unit. They take a few minutes and prevent many calls.
- Clean the indoor unit's filters.
- Clear leaves and debris left on the outdoor unit by winter.
- Test cooling before the first hot days.
- Clean the filters more often when the unit runs a lot.
- Keep plants away from the outdoor unit.
- Check that no water drips from the indoor unit.
- Rake the leaves around the outdoor unit.
- Test heating before the first cold days.
- Book periodic maintenance before winter.
- Keep snow away from the stand and the front of the unit.
- Let the unit defrost: it is normal.
- Never hit the ice on the fins; call us if the unit stays iced up.
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What people ask us about this kind of work
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Text and photo: a real AirGreen Climatisation & Chauffage job. The diagrams are generic illustrations of the type of installation, not a survey of this job site. Sources of the added figures: airgreen.ca product pages (NEEP / AHRI performance), Hydro-Québec (Heat pumps page, LogisVert, read on 13 October 2026), Régie de l’énergie (rate D as of 1 April 2026).