An HVAC project in Dorval where every inch of technical space had to be used smartly
In Dorval, in the west of the island of Montreal, our AirGreen team completed a meticulous HVAC installation of a GREE ducted heat pump, Slim Duct type, also called ducted conduit or ductable system. This type of installation is for owners seeking uniform comfort without multiplying visible wall units in rooms. Here, the goal was clear: to integrate a high-performance GREE solution in a limited space while ensuring effective air distribution, reasonable maintenance access, and a clean technical finish.
The photo of the site clearly shows the uniqueness of this project: the GREE indoor unit was installed in a narrow mechanical space, with a direct connection to the duct network, refrigerant lines, wiring, and condensate drainage. This is not a standard installation where space is abundant and connections are easy. In this type of setup, the quality of the work depends on precise positioning, managing clearances, careful connections, and the team's ability to anticipate future interventions.
In Dorval, as in many homes in Montreal, Laval, Longueuil, the North Shore and the South Shore, technical spaces can be complex: old walls, existing openings, ducts to connect, limited access, interior finishes to preserve, and structural constraints. Our job is to turn these constraints into a functional, durable, and well-integrated installation.
Why choose a GREE ducted system rather than a wall-mounted heat pump?
A wall-mounted heat pump remains an excellent solution in many homes, but it is not always the best option when the client wants a more discreet integration. In this project in Dorval, the choice of a GREE ducted system allowed meeting several needs at once:
- Reduce visual impact in living spaces.
- Distribute air through ducts rather than from a single wall point.
- Maintain a cleaner interior aesthetic.
- Offer more uniform comfort in targeted areas.
- Adapt the system to an existing configuration.
- Facilitate a more centralized approach to heating and air conditioning.
The GREE ducted system is particularly relevant in homes where you want to hide the indoor unit in a mechanical space, a false ceiling, an attic, a technical closet, or a dedicated section of the house. Only the diffusion grilles remain visible. For many clients, this difference completely changes the experience: comfort is present, but the equipment does not dominate the interior design.
The GREE ducted range offered by AirGreen
At AirGreen, we install several GREE ducted solutions, including low static pressure models, high static pressure models, and the GREE All Match Slim Duct R32 series. This range can meet very diverse projects, from a small residential area to more ambitious installations with multiple air outlets.
The available capacities in the GREE ducted system family notably cover power levels of 9,000 BTU, 12,000 BTU, 18,000 BTU, 21,000 BTU, 24,000 BTU, 30,000 BTU, and 36,000 BTU, depending on the models and configurations. The choice of capacity is never random. It must take into account the area, volume, insulation level, solar orientation, duct length, static pressure, number of grilles, and actual usage habits.
For this project in Dorval, we worked around a GREE ducted solution chosen for its compact integration and compatibility with duct distribution. The advantage of a Slim Duct system is precisely to allow a more discreet installation in areas where a conventional unit would be too visible or bulky.
A compact installation with precise technical connections
The photo highlights an essential part of the work: the connections around the indoor unit. You can see the GREE device, refrigerant lines, pipe insulation, communication wiring, and connection elements to the air network. In a tight space, every element must be logically placed.
Refrigerant lines
The refrigerant lines connect the indoor unit to the outdoor unit. They must be well insulated, securely fastened, and protected against friction. Poor management of the lines can lead to efficiency losses, unwanted condensation, or access problems during future service. In this project, the available space required a neat installation, with controlled curves and special attention to passage points.
Connection to the duct
The ducted system depends directly on the quality of the connection to the duct network. A poorly sealed joint can cause air leaks, noise, reduced airflow, and lower performance. Our team therefore paid special attention to aligning the unit with the duct, ensuring continuous airflow, and securing the connections.
Access for HVAC maintenance
A hidden system should never become inaccessible. The HVAC maintenance of a ducted heat pump requires access to filters, service panels, the condensation drain, and main components. Even in a tight space, we plan the installation to make future interventions possible. This is a major difference between a simply functional installation and a truly professional one.
Static pressure: a technical detail that determines comfort
In a ducted system, static pressure is a key element. It represents the unit's ability to push air through a duct network despite the resistances created by lengths, bends, grilles, filters, and transitions. If this pressure is not properly assessed, the system can be noisy, have low airflow, or be unable to effectively reach certain rooms.
The GREE range includes options for low static pressure and high static pressure. Low static pressure is often suitable for short and simple networks. High static pressure becomes more relevant when longer distances must be covered, multiple grilles supplied, or a more restrictive network managed.
In this Dorval project, the tight configuration of the technical space made this analysis even more important. We had to consider not only the BTU capacity but also how the air would exit the unit, pass through the network, and reach the targeted zones without excessive losses.
The role of R32 in new GREE installations
The GREE All Match Slim Duct R32 series is part of the modern solutions offered for ducted heat pump projects. The refrigerant R32, used in some recent models, represents an important technical evolution in the HVAC industry. It allows the design of efficient, compact equipment adapted to current expectations regarding energy performance.
For the owners in Dorval, this type of system represents a good compromise between comfort, efficiency, and architectural integration. Depending on the exact model, some GREE units are also designed to offer interesting heating performance in Quebec's cold conditions, with operating capacities that can go down to -30 °C depending on the models.
The specific challenges encountered on this site
Each ducted installation has its own constraints. In Dorval, the main challenge was the available technical space. The unit had to be integrated into an existing area without compromising access, forcing connections, or creating tension on the lines.
The main points of attention were as follows:
- Position the GREE unit to allow good connection to the existing duct.
- Maintain reasonable access to service components.
- Properly insulate the lines to limit the risk of condensation.
- Provide reliable drainage for condensation water.
- Avoid unnecessary vibrations or points of contact.
- Keep the installation clean despite the proximity of walls and openings.
- Respect the required clearances for stable operation.
A successful ducted installation is not only seen in the final result. It is also measured by how the connections were planned. In a tight space, a poorly oriented pipe, a too-tight duct, or a blocked service panel can become costly problems. Our approach is to anticipate these details from the installation stage, rather than correcting them later.
A discreet solution for Dorval homes, with AirGreen expertise on GREE ducted systems
The Dorval area features a wide variety of residences: family homes, renovations, older buildings, extensions, and spaces where integrating an HVAC system must respect the existing architecture. It is precisely in this context that GREE ducted heat pumps become interesting. They improve comfort without imposing a significant visual presence in the rooms.
Comfort after installation
Once the system is commissioned, the client enjoys heating and air conditioning distributed through ducts. The air is diffused more subtly, with a comfort sensation different from that of a wall unit. When the network is well designed, the temperature becomes more stable and the served zones benefit from better balance.
The benefits felt daily are concrete:
- Less visible equipment in the rooms.
- More discreet air diffusion.
- Better distributed comfort.
- Integration adapted to renovations.
- Operation consistent with the home's needs.
- A solution compatible with a refined interior aesthetic.
For many homeowners, one of the great advantages of the Slim Duct GREE is keeping the walls free. In a bedroom, living room, or hallway, the absence of a visible wall unit can be a decisive factor.
Mistakes to avoid with a ducted system
Our experience in HVAC installation in Montreal, Laval, Longueuil, on the North Shore and the South Shore shows us that ducted systems can offer excellent results when well designed. Conversely, some mistakes can quickly harm comfort and performance.
Choose only according to BTU
BTU capacity is important, but it is not enough. A ducted system must also be chosen according to the available static pressure, the duct network, and the required airflow.
Neglecting the condensate drain
In air conditioning, the indoor unit produces water. A bad slope, poor connection, or difficult access to the drain can cause drainage problems. In a closed space, this step must be taken very seriously.
Forgetting after-sales service
A concealed system must remain accessible. Filters, panels, connections, and diagnostic elements must be reachable by a technician. At AirGreen, we consider maintenance from the design stage.
Poorly sealing the ducts
Air leakage in a technical space reduces efficiency and can harm comfort. Connections must be airtight, well aligned, and securely fastened.
Installing in a space that is too constrained without planning
A tight space is not a problem in itself, but it requires more precision. Positioning must be carefully planned before connecting the lines and ducts.
Subsidies, energy efficiency, and model choice
Homeowners considering a heat pump in Dorval are often interested in available financial aid. Some GREE models may be eligible for subsidies depending on their certification, energy efficiency, and the rules of programs applicable at the time of installation. Eligibility must always be verified based on the exact model installed.
At AirGreen, we help our clients better understand information related to subsidies, certifications, and documents required after the work. This assistance is especially useful when the client compares several options: wall unit, multi-zone, low-pressure or high-pressure ducted system, R32 series, or other GREE configuration.
The final choice must be balanced. The best system is not automatically the biggest or the most expensive. It is the one that fits the house, the air network, the budget, the acoustic expectations, and the desired comfort level.
Why call on AirGreen for a GREE ducted installation in Dorval?
An installation of GREE ducted duct requires a different expertise than a traditional wall-mounted installation. You need to understand how the machine works, but also the air distribution, pressure losses, drainage, clearances, maintenance access, and architectural integration.
AirGreen offers a comprehensive approach:
- Technical evaluation of the project before installation.
- Recommendation adapted to the building.
- Selection of the right GREE series according to constraints.
- Installation by experienced refrigeration technicians.
- Clean and thoughtful connections.
- Clear advice on use and maintenance.
- Structured after-sales service in Dorval and Greater Montréal.
Our status as a GREE Elite dealer also allows us to better support clients with specialized systems, including low and high static pressure ducted models, as well as certain All Match Slim Duct R32 configurations. This specialization is important because ducted systems do not tolerate improvisation.
An installation that respects the home and its constraints
This project in Dorval is a good example of what we look for in a successful HVAC installation: a high-performance system, well integrated, neatly connected, and designed to last. The client wanted a discreet solution capable of heating and cooling efficiently without changing the appearance of the rooms. The GREE ducted heat pump perfectly met this need.
Integration into the technical space required precision. The lines, duct, wiring, and access points were organized to achieve a solid and coherent installation. This type of work reflects our approach well: we don’t just aim to make the device work, we want to deliver a system that remains reliable, accessible, and pleasant to use.
For owners in Dorval, Montréal, Laval, Longueuil, the North Shore and the South Shore, a GREE Slim Duct system can be an excellent option when you want to combine comfort, efficiency, and discretion. With serious design and rigorous installation, the ducted heat pump becomes an elegant solution to modernize heating and air conditioning in a home without compromising its interior layout.