A ducted installation designed to blend into the architecture while improving comfort room by room
In Vimont, in the Laval area, our AirGreen team completed a particularly interesting HVAC installation: integrating a GREE ducted heat pump, also called ducted conduit, Slim Duct, or ductable system, with a duct network installed in the attic. This type of project meets a growing demand in homes in Montreal, Laval, Longueuil, on the North Shore and the South Shore: to enjoy the comfort of a modern heat pump without having multiple visible wall units in the rooms.
In this Vimont home, the client wanted a simple, efficient solution that was better distributed than a single wall unit. The goal was clear: to cool and heat multiple living areas from a discreet central system, with well-positioned supply grilles and mechanical equipment placed out of sight. The attic provided the necessary space to run the ducts but also imposed significant constraints: limited access, blown insulation, framing to work around, maintaining duct airtightness, and protecting thermal efficiency.
The photo of the site clearly illustrates the reality of a ducted heat pump installation: insulated flexible ducts must be positioned methodically, without crushing, excessive bends, or unnecessary static pressure loss. Every detail matters because a poorly oriented or overly compressed duct can reduce airflow, increase noise, cause temperature variations, and harm the overall system performance.
Why choose a GREE ducted system in Vimont?
A GREE ducted system is often chosen by homeowners who want to combine performance, discretion, and uniform comfort. Unlike a wall heat pump, whose indoor unit is visible in the room, the ducted conduit is generally installed in an attic, a false ceiling, a technical basement, or a mechanical space. The air is then distributed through ducts to different rooms via discreet grilles.
For this project in Vimont, this approach offered several concrete advantages:
- Much more discreet visual integration than a traditional wall system.
- Better air distribution in multiple rooms.
- Ability to adjust comfort according to the actual layout of the house.
- Reduction of wall clutter in bedrooms, corridors, and common areas.
- Solution suitable for homes where interior aesthetics are a priority.
- Installation compatible with short and properly sized duct networks.
At AirGreen, we recommend this type of solution when there is adequate technical space and when the project justifies a more advanced air network design. A ducted heat pump requires more planning than a standard wall unit, but the result can be much more elegant and comfortable when the installation is well executed.
The GREE choice: a versatile ducted range for residential projects
The GREE ducted range available at AirGreen includes several families and capacities, notably FM Ducted Conduit systems in low or high static pressure, high-pressure duct systems, and the GREE All Match Slim Duct R32 series. The available capacities generally cover various needs, with options 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 series and configuration.
For a residence like this one in Vimont, the choice of model is never limited to the approximate area. We analyze several factors:
- The volume of the rooms to be treated.
- The existing insulation.
- The number of desired air outlets.
- The length of the ducts.
- The expected pressure losses.
- The available static pressure.
- The orientation of the house and solar gains.
- The client's usage habits.
- The possible location of the indoor and outdoor units.
The GREE All Match Slim Duct R32 series is particularly interesting for projects seeking a compact, efficient, and discreet solution. The refrigerant R32, available on some models, fits into a more modern HVAC trend, with equipment designed to offer a good balance between performance, efficiency, and technical integration. Some GREE ducted models can also provide heating performance suited to Quebec winters, with operating capacities down to -30 °C depending on the model.
A job in the attic: the real complexity of a ducted system
Installing a GREE ducted heat pump in an attic is not just a matter of placing a machine and connecting a few ducts. This type of work requires a precise understanding of air distribution, sealing, insulation, and future accessibility for HVAC maintenance.
In this project in Vimont, our team worked in a space where the framework and blown insulation required special attention. The visible insulated black ducts on the site had to be routed between the wooden studs while respecting the available passages. A poor decision at this stage can have direct consequences on the final comfort: air noise, insufficient airflow, uneven temperature, or reduced performance.
Our technicians have therefore paid special attention to the following points:
Maintaining the proper effective diameter of ducts
A flexible duct must not be crushed or bent too sharply. Even slight compression can reduce the effective cross-section and limit airflow. In a ducted installation, airflow is the foundation of comfort. We have therefore worked with the most gradual curves possible, avoiding constrictions.
Protecting the existing insulation
The attic had blown insulation, which plays an important role in the home's energy performance. During the duct installation and work around the indoor unit, our team took care to limit unnecessary displacement of insulation and preserve the thermal barrier.
Planning access for service
A good HVAC system must be installable but also repairable and maintainable. For this type of project, we consider access to filters, service panels, the condensate drain, and connection elements from the start. This is often overlooked by less specialized installers but becomes crucial a few years later when maintenance or diagnostics are needed.
Reducing pressure losses
Static pressure is a central element in a Slim Duct system. Every bend, every length of duct, every grille, and every fitting influences the fan's ability to push air properly. Our approach is to limit unnecessary runs, balance the outlets, and adapt the design to the selected model.
Low static pressure or high static pressure: an important technical decision
In the GREE ducted range, there are options for low static pressure and high static pressure. This distinction is essential. A low-pressure unit is generally suitable for short, simple, and low-restriction networks. A high-pressure unit is more appropriate when ducts are longer, there are more outlets, or the configuration imposes more air resistance.
In Vimont, this consideration was part of the project design. A ducted system should not be chosen solely based on the number of BTUs. It is also necessary to ensure that the indoor unit can actually distribute air through the planned network. An undersized unit in terms of static pressure might seem adequate on paper but provide disappointing comfort once installed.
At AirGreen, we therefore place great importance on network analysis before the final equipment selection. This rigor helps avoid several common mistakes:
- Choosing a capacity that is too high without checking the actual airflow.
- Installing too many grilles on a small ducted unit.
- Use ducts that are too long or too narrow.
- Neglect balancing between rooms.
- Place the unit in a hard-to-reach location.
- Forget about condensate management in cooling mode.
An AirGreen solution designed for lasting comfort, energy efficiency, and after-sales service
This project in Vimont clearly demonstrates the difference between a simple installation and a true HVAC design. A ducted heat pump must be considered as a complete system: indoor unit, outdoor unit, ducts, grilles, drains, controls, insulation, technical access, and future maintenance.
Comfort achieved after installation
Once the system is installed and tested, the client enjoys much more uniform comfort. The air is not blown from a single wall unit but distributed in the rooms targeted by the network. This result is especially appreciated in houses where bedrooms and corridors are difficult to treat with a single wall unit.
The ducted system also improves the daily experience:
- More stable temperature.
- Less variation between rooms.
- Minimal visual presence.
- Quiet operation when the network is well designed.
- Better integration in renovation projects.
- Possibility to adapt the grilles according to the interior layout.
In Vimont, this discretion was an important criterion. The client wanted a high-performance solution without changing the appearance of the main rooms. The GREE ducted duct perfectly met this expectation.
The importance of a clean installation in an attic
Attic installations require special discipline. The space is often dusty, narrow, and filled with insulation. Our teams work methodically to limit damage, organize the ducts, and leave a clear, solid, and professional installation. This cleanliness is not just aesthetic: it facilitates inspections, future interventions, and system durability.
In this project, insulated flexible ducts were arranged to avoid mechanical stress. The supports, passages, and connections were designed to maintain good air circulation. The goal is always the same: to deliver an installation that works well from day one and remains reliable over the seasons.
Grants and energy efficiency
Homeowners in Montreal, Laval, Longueuil, the North Shore, and the South Shore are increasingly interested in the subsidies available for eligible heat pumps. Depending on the chosen model, its efficiency, and current programs, some devices may qualify for financial assistance, especially when they meet applicable performance criteria.
At AirGreen, we help our clients understand the general criteria, verify information related to the selected model, and prepare the necessary documents after installation. It is important to remember that eligibility always depends on the exact model, its certification, and the program rules at the time of application. For GREE systems, certain configurations may be worth analyzing when a client wants to maximize comfort while optimizing their net budget after subsidy.
What homeowners should check before choosing a ducted system
A ducted system is an excellent option, but it is not suitable for all homes. Before recommending this type of installation, we check several elements on site.
Available space
The attic, false ceiling, or mechanical space must allow for the safe installation of the indoor unit and duct passage. A space that is too low, cluttered, or inaccessible can make the project more complex.
Duct routing
Each air outlet must be realistic. Long runs, sharp turns, and areas where ducts would be compressed by the structure should be avoided.
Noise
A well-designed ducted system can be very discreet. However, poor design can create noise in the grilles or ducts. That’s why we analyze air velocity, grille selection, and static pressure.
The condensation drain
In cooling mode, the indoor unit produces condensation. The drain must be reliable, properly sloped or assisted if necessary, and accessible for maintenance. This is a crucial point in an attic installation.
Maintenance
Filters and access panels must remain reachable. An invisible installation should never become impossible to maintain.
The most common mistakes in ducted installations
Our experience with ducted heat pump projects in Laval, Montreal, Longueuil, on the North Shore and the South Shore allows us to quickly identify costly long-term mistakes.
Here are the ones we see most often:
-
Underestimating static pressure
A system may have the right BTU capacity but fail to push air properly through the ducts. -
Installing ducts that are too long
The longer the path, the greater the losses. A compact design is often more efficient. -
Using poorly tensioned flexible ducts
A flexible duct that is too sagged or bent reduces airflow and can create noise. -
Multiplying outlets without calculation
Adding grilles does not guarantee better comfort. Each outlet must receive sufficient airflow. -
Neglecting filter access
An inaccessible filter will rarely be properly maintained, which reduces system performance and lifespan. -
Ignoring attic insulation
Ducts installed in an unconditioned space must be well insulated to limit heat loss.
Why AirGreen is well positioned for this type of project
AirGreen regularly carries out complex HVAC projects in residential, commercial, and multi-unit contexts. Our experience with GREE ducted heat pumps, wall systems, multi-zones, and installations in tight spaces allows us to approach each job with a comprehensive vision.
We don’t just sell a machine. We analyze the house, constraints, client expectations, and technical possibilities. This approach is particularly important for ducted systems, as the result depends as much on the quality of the equipment as on the quality of the design.
Our clients also appreciate our transparency. Before the work begins, we provide a clear quote, explain the options, and avoid surprises. For projects in Vimont and elsewhere in Laval, this clarity is essential, especially when the installation involves an attic, ducts, outdoor equipment, and on-site technical adjustments.
An installation adapted to the Quebec climate
The climate in Vimont, like that of Greater Montreal, involves significant temperature variations. A good heat pump must provide comfort in summer but also contribute effectively to heating during much of the winter. GREE ducted solutions, depending on the chosen model, can offer interesting performance in cold conditions, with some series designed to operate at very low temperatures.
In a well-insulated home, a properly sized ducted system can become a very effective comfort solution. It can reduce reliance on certain existing heating systems, improve summer air conditioning, and offer better air distribution in hard-to-treat areas.
A discreet, technical, and durable result
This installation of a GREE ducted heat pump in Vimont perfectly illustrates the type of project where expertise makes all the difference. The client did not just want to add an air conditioning unit. They wanted an integrated, discreet, well-thought-out solution capable of improving home comfort without compromising interior aesthetics.
Thanks to a thorough analysis, a suitable selection from the GREE range, and careful installation in the attic, our team delivered an HVAC system designed to operate efficiently and remain accessible for maintenance. The ducts installed in the attic, the connections, positioning, and air management were all handled with the same priority: achieving real comfort, not just a functional installation.
For homeowners in Vimont, Laval, Montreal, Longueuil, the North Shore and the South Shore who want a discreet heating and air conditioning solution, the GREE ducted system is a serious option to consider. When well designed and installed by a specialized team, this type of system can transform the comfort of a home while remaining almost invisible on a daily basis.