A GREE ducted installation in Laval in a narrow and technical attic space
In Laval, this installation of a GREE All Match Slim Duct R32 ducted heat pump represents exactly the type of project where a discreet HVAC solution must be carefully planned from the start. The client wanted to benefit from an efficient heating and air conditioning system, but without installing a visible wall unit in the main rooms. The chosen solution: a ducted system, also called ducted conduit, Slim Duct or ductable, integrated into the attic to distribute air through discreet ducts and grilles.
The construction site photo clearly shows the real complexity of the installation. The GREE indoor unit is positioned in a very tight space, between the wood structure, the OSB panel, blown insulation, and existing framing elements. In this kind of environment, every inch counts. It is not enough to place the device in the attic: it must be ensured that the unit remains stable, accessible, well connected, properly ventilated, and perfectly integrated into the duct network.
At AirGreen, we are used to this type of project in Montreal, Laval, Longueuil, on the North Shore and the South Shore. The attics of existing houses are rarely originally designed to accommodate a modern HVAC system. Therefore, the installation must be adapted to the building's reality without compromising performance. This intervention in Laval required careful planning, both for the unit's location and for the duct routing, drainage management, service access, and refrigerant connections.
Why choose a ducted heat pump rather than a wall unit
In several residential projects in Laval, homeowners hesitate between a wall-mounted heat pump and a ducted heat pump. Both solutions can be effective, but they do not meet the same needs.
A wall unit is visible, quick to install, and very suitable for several configurations. A ducted system, on the other hand, is mainly for clients who want a more discreet integration, better air distribution, and a cleaner interior finish. In this project, the client wanted to avoid the visual impact of a wall unit in the living areas. The GREE All Match Slim Duct R32 system allowed the indoor unit to be installed in the attic, then air to be distributed to targeted zones through discreet grilles.
This solution becomes particularly relevant when:
- the interior walls must remain free;
- the aesthetics of the rooms are a priority;
- several adjacent zones must be served;
- an attic, a false ceiling, or a technical space is available;
- the client seeks more uniform comfort;
- the noise level in the rooms must be reduced;
- the building requires a more integrated HVAC solution.
The main advantage of the Slim Duct GREE is its discretion. Once the work is finished, the system visually disappears. Yet behind this discretion, there is a technical design that must be very precise.
A unit installed in a limited space: the challenge of this project in Laval
The attic visible in the photo presented several constraints. The available space was low, framed by the framework and surrounded by insulation. The unit had to be positioned to respect the necessary clearances while allowing connections to the duct network and refrigerant lines.
Our technicians had to pay special attention to several elements:
Unit stability
A ducted unit installed in an attic must rest on a solid and stable base. Poorly supported installation can cause vibrations, noise, and mechanical stress on the connections. In this project, the unit was installed to remain well aligned, with particular attention to leveling and the support structure.
Access to the service panel
In the photo, you can clearly see the upper part of the unit and its technical panels. This access is not a minor detail. A hidden system must remain accessible for HVAC maintenance, diagnostics, electrical checks, drainage inspections, and future interventions. A common mistake in ducted installations is placing the unit in a location where no technician can work properly afterward.
The proximity of the insulation
Blown insulation and materials present in the crawl space must be handled carefully. Insulation should not block access, hinder ventilation around components, or compromise connections. Our technicians always take the time to clear critical areas to maintain a clean and durable installation.
The limited height
The low available height requires a careful selection of the type of unit. This is one of the reasons why the GREE All Match Slim Duct R32 range is interesting: its compact format facilitates integration in spaces where a conventional unit would be too bulky.
GREE All Match Slim Duct R32: a choice suited to discreet projects
The GREE All Match Slim Duct R32 range is designed to offer a modern, flexible ducted solution well suited to residential projects. AirGreen offers several capacities in this category, including 9,000 BTU, 12,000 BTU, 18,000 BTU, 24,000 BTU, 30,000 BTU, and 36,000 BTU, depending on available configurations and building needs.
In an installation like this in Laval, capacity should never be chosen solely based on a general impression. A serious calculation must take several factors into account:
- the area to be heated and cooled;
- the number of rooms served;
- home insulation;
- sun exposure;
- ceiling height;
- window quality;
- thermal losses;
- the duct configuration;
- the static pressure of the network;
- customer expectations regarding comfort.
An oversized heat pump can run in too short cycles, which harms humidity control and comfort. An undersized heat pump may lack capacity on very cold or very hot days. The right choice is therefore based on a comprehensive evaluation.
Depending on the selected models, GREE ducted systems can offer:
- inverter technology to modulate power according to actual demand;
- heating performance adapted to the Quebec climate, with some models designed to operate down to -30 °C;
- Energy Star options according to eligible models;
- the use of refrigerant R32 for recent series;
- integration in ceiling, false ceiling, attic, or crawl space;
- low or high static pressure configurations;
- a warranty of up to 12 years on certain selected GREE models, subject to applicable conditions.
As a GREE Elite dealer, AirGreen has specialized expertise in installing GREE ducted systems, including both low and high static pressure versions. This specialization is essential because a ducted system requires precise understanding of ventilation, airflow, pressure losses, and service access.
An HVAC installation where the duct network determines the final comfort
The performance of a ducted system depends as much on the duct network as on the unit itself. This is a point we often explain to customers. An excellent heat pump installed with poorly designed ducts will not deliver good results. Conversely, a well-planned installation can provide stable, discreet, and pleasant comfort for years.
Static pressure: a central element
Static pressure corresponds to the resistance the air encounters in the network. Every bend, every length of duct, every grille, every filter, and every reduction adds resistance. If this pressure is poorly assessed, the unit may lack airflow, become noisier, or consume more energy.
In this project in Laval, our team took into account the attic constraints to choose an appropriate approach. Depending on the layout, a low static pressure system may be sufficient when the ducts are short and simple. A high static pressure system becomes preferable when the network is longer or more complex. The goal remains the same: to achieve balanced airflow, without excessive noise and without overworking the equipment.
The air return: often overlooked, always essential
The air return is one of the most important aspects of a ducted system. Without adequate air return, the unit cannot operate properly. It can become noisy, lose efficiency, and create an imbalance in the home.
At AirGreen, we always check that the air return matches the capacity of the unit and the room layout. A good installation is not just about blowing air into the rooms but also allowing the air to return properly to the unit.
Duct insulation in the attic
In an attic, ducts must be properly insulated. In summer, the space can become very hot; in winter, it can become very cold. Poorly insulated ducts would lead to energy loss, reduced performance, and sometimes condensation.
Duct insulation helps protect the system's performance. It also helps maintain a more stable air temperature up to the diffusion grilles. For a customer in Laval investing in a ducted HVAC installation, this step is essential.
Drainage management
In cooling mode, the indoor unit produces condensate. This condensate must be reliably drained. In an attic, a drainage error can have significant consequences: water infiltration, ceiling stains, odors, excessive humidity, or system shutdown.
Our technicians therefore check the slope, drain path, connections, and system safety. When gravity is not enough, a condensate pump may be necessary. Each project is analyzed according to the building's reality.
A clean installation despite a difficult environment
Attics are not easy spaces. They are often low, dusty, insulated, difficult to access, and crossed by structural elements. Yet, the work must remain clean, organized, and durable.
In this installation in Laval, our team worked methodically to protect the components, maintain essential access, and avoid creating future problems. The unit was placed to allow technical connections while respecting space constraints. This type of detail is not always visible in finished rooms, but it directly influences the system's reliability.
Concrete benefits for the customer
After installation, the customer benefits from a comfort solution that is more discreet than a traditional wall unit. The ducted system allows for better integrated air distribution in the home, with a much more understated interior appearance.
The main advantages are clear:
An almost invisible integration
The indoor unit is hidden in the attic. In the rooms, only the grilles are visible. This is a very popular solution in renovated houses, condos, high-end spaces, or projects where interior appearance matters a lot.
Better distributed comfort
When the ducts are well designed, the air is distributed more evenly. This reduces areas that are too hot or too cold and improves overall comfort.
Better value for renovation projects
In several renovations in Laval, homeowners want to modernize comfort without changing the appearance of the rooms. A ducted heat pump meets this need well.
Performance adapted to the Quebec climate
GREE models designed for low-temperature heating can meet the demands of our winters, depending on the chosen capacity and configuration. This is an important point for owners in Montreal, Laval, Longueuil, the North Shore, and the South Shore, where heating represents a large part of annual usage.
A structured after-sales service
AirGreen offers support after installation, including maintenance, inspections, service calls, and access to original GREE parts. For a system hidden in the attic, this follow-up is especially important.
Mistakes to avoid with a ducted heat pump
Before installing a ducted system, several pitfalls must be avoided. It is often these details that separate an average installation from a durable and comfortable one.
Neglecting future access
A ducted system must remain accessible. Filters, panels, drains, and connections must be inspectable. A unit that is too enclosed becomes difficult to maintain.
Underestimating pressure losses
Ducts that are too long, too small, or too compressed can greatly reduce airflow. The system can then become noisy or ineffective.
Forgetting about balancing
Each air outlet must be planned according to the served zone. One room may receive too much air, another not enough. Balancing is therefore essential.
Installing without considering the insulation
In an attic, insulation can interfere with access or components if the installation is poorly organized. Important areas must be cleared and ducts protected.
Choosing the model based only on price
A ducted system must be chosen according to the building, static pressure, capacity, expected comfort, and technical feasibility. Price alone is not enough to determine the best solution.
Why AirGreen is a solid choice for ducted projects in Laval
AirGreen regularly carries out complex HVAC installations in the greater Montreal area. Our experience covers single-family homes, condos, plexes, multi-unit buildings, renovations, and hard-to-access technical spaces.
For GREE ducted systems, our approach is based on several commitments:
- a clear estimate before the work;
- a thorough analysis of the building configuration;
- equipment selection adapted to real needs;
- professional refrigeration technicians with experience;
- a clean installation compliant with best practices;
- special attention to service access;
- civil liability insurance of 5 000 000 $;
- support for subsidy-related documents when the model is eligible.
We also help clients understand the available options. On our site, the GREE FM Ducted Conduit systems, low and high static pressure versions, ductless conduit systems, and GREE All Match Slim Duct R32 models are presented for different needs. Our role is then to recommend the right solution according to the actual project, not to apply a generic formula.
Subsidies and eligibility: what you need to know
Some heat pump models may be eligible for subsidy programs, especially when energy efficiency criteria are met. Eligibility always depends on the exact model, capacity, applicable certification, installation date, and the rules in effect at the time of the project.
At AirGreen, we assist our clients in preparing the required documents when the selected equipment is eligible. A well-documented installation facilitates the client’s procedures and reduces the risk of errors in the application.
A project that demonstrates the importance of field expertise
This installation in Laval shows that a successful ducted system depends not only on the chosen equipment. It depends on site analysis, unit positioning, duct design, drainage management, future accessibility, and the quality of connections.
In this tight attic space, our team had to work with the existing structure, insulation, low height, and the requirements of a durable installation. It is precisely under these conditions that AirGreen’s experience proves its full value.
A GREE All Match Slim Duct R32 ducted heat pump properly installed can transform the comfort of a home while preserving its aesthetics. For homeowners in Laval looking for a discreet, efficient, and climate-appropriate solution for Quebec, the ducted system represents a serious option, provided it is designed and installed by a team that truly masters this type of project.