Installation of a GREE All Match Slim Duct R32 ducted heat pump in Anjou: Slim Duct system with custom metal plenum and residential ductwork

A discreet HVAC installation in Anjou, designed around a precisely manufactured duct network

In Anjou, AirGreen completed a specialized HVAC installation of a GREE All Match Slim Duct R32 ducted system, a solution designed to offer uniform comfort while keeping the indoor equipment practically invisible once the work is completed. This type of project is very different from a classic wall air conditioner or wall-mounted heat pump installation: here, the quality of the result depends as much on the machine as on the design of the air distribution network.

The construction site photo illustrates a very important stage of this project: the preparation of a galvanized sheet metal plenum, equipped with several circular outlets designed to receive flexible or rigid ducts that will distribute air to the targeted rooms. It also shows the level of precision required to align the outlets, prepare the connections, work neatly in a confined outdoor space, and coordinate components before their integration into the house.

In a residential area like Anjou, where houses may have access constraints, limited mechanical spaces, and high expectations for interior aesthetics, a ducted heat pump becomes a particularly interesting option. It allows for cooling and heating multiple zones without installing a visible wall unit in each room. Comfort is distributed through discreet grilles, while the indoor unit and ducts remain integrated into the ceiling, attic, basement, false ceiling, or technical space.

At AirGreen, we approach each ducted system installation as a complete system: equipment, static pressure, airflow, insulation, sealing, drainage, maintenance access, noise, duct routing, and finishing. This approach is what makes the difference between a simply functional installation and one that is stable, quiet, and durable.

Why a GREE ducted heat pump in a house in Anjou

The GREE ducted range meets a specific demand: to achieve the comfort of a centralized system but with the flexibility of a solution without full traditional ducts. The All Match Slim Duct R32 models are designed to be integrated into spaces where discretion is a priority, while maintaining excellent air distribution capacity when properly sized.

In this installation in Anjou, the owner was looking for a solution capable of serving several rooms with a discreet interior finish. The challenge was not only to choose a GREE machine but to create a coherent distribution network. The plenum visible on the site shows exactly this logic: each air outlet must be designed according to the zone it serves, the duct length, pressure loss, available pressure, and the expected comfort in the room.

A GREE ducted heat pump can be particularly relevant in the following situations:

• house where visible wall units are to be avoided;
• floor with several bedrooms to serve;
• living area where a more uniform temperature is desired;
• renovation where ceiling space allows duct passage;
• project where interior aesthetics matter as much as performance;
• need for a solution more discreet than a traditional wall system;
• residential building in Montreal, Laval, Longueuil, on the North Shore or the South Shore with architectural constraints.

In Anjou, this approach allows integrating HVAC comfort into the house structure rather than imposing it visually on the occupants.

The metal plenum: an essential part, often underestimated

The most visible component in the photo is the galvanized sheet metal plenum with several circular outlets. This part plays a central role in a Ducted – Ducted Ducts – Slim Duct – Ductable installation. It receives the air treated by the indoor unit and distributes it to the different supply ducts.

A poorly designed plenum can create several problems: air noise, imbalance between rooms, pressure losses, insufficient flow in the longest ducts, excessive turbulence, and reduced efficiency. Conversely, a well-made plenum facilitates more stable distribution and helps the system operate under better conditions.

In this project in Anjou, the fabrication and preparation of the plenum required special attention:

Alignment of air outlets

Each circular outlet must be positioned to facilitate duct connections. The angle, spacing, and orientation of the outlets influence the quality of the final network. In a residential installation, a few inches can make a big difference, especially when ducts must pass through a ceiling, attic, or tight mechanical space.

Sheet metal rigidity and finish

The galvanized sheet metal used for a plenum must maintain its shape, withstand site handling, and provide a surface suitable for effective sealing. A piece that is too flexible can vibrate, produce noise, or complicate connections. The rigidity of the box also contributes to the acoustic control of the system.

Sealing of joints

The performance of a ducted heat pump strongly depends on the tightness of the network. Every joint, transition, fitting, and collar must be carefully treated. An air leak in an unconditioned space can cause discomfort and unnecessary energy consumption. At AirGreen, we pay special attention to these details because they directly impact the actual efficiency of the installation.

Preparation before indoor integration

The photo shows an outdoor preparation step before the final installation inside the building. This method allows checking the assembly, adjusting components, and limiting handling in harder-to-reach areas. In ducted projects, good preparation outside the technical space can make the indoor installation cleaner, faster, and more precise.

The role of static pressure in a Slim Duct system

A Slim Duct system does not operate like a wall unit. The air must flow through a network of ducts, grilles, transitions, and sometimes distribution boxes. This flow creates resistance called static pressure.

The GREE ducted products offered by AirGreen include low static pressure, high static pressure, and All Match Slim Duct R32 options. The right choice depends on the actual project, not just the area. A short network with few outlets may suit a different configuration than a more complex network with several branches, like the one observed in this project.

For this installation in Anjou, the analysis had to take several elements into account:

• number of rooms to serve;
• distance between the unit and the grilles;
• duct diameter;
• number of elbows;
• total length of the network;
• location of the return air;
• insulation constraints;
• acceptable noise level;
• accessibility for HVAC maintenance.

A common mistake is to choose the BTU capacity without validating the available pressure. However, an 18,000 BTU or 24,000 BTU unit, for example, will not automatically give a good result if the air network is not balanced. Thermal capacity and ventilation capacity must work together.

GREE capacities adapted to different residential projects

The GREE ducted range offered by AirGreen includes several capacities depending on the series: 9,000 BTU, 12,000 BTU, 18,000 BTU, 21,000 BTU, 24,000 BTU, 30,000 BTU, and 36,000 BTU. This variety allows the system to be adapted to very different projects, whether it is a small zone, a full floor, or a more extensive configuration.

The GREE All Match Slim Duct R32 models are available in several capacities, including 9,000, 12,000, 18,000, 24,000, 30,000, and 36,000 BTU, allowing for a more precise selection according to the home's needs. The final choice is based on serious sizing: area, insulation, solar orientation, window placement, ceiling height, occupancy, heat loss, and distribution possibilities.

For an owner in Anjou, this step is essential. A device that is too small will run too long and may struggle during very hot or very cold days. A device that is too large can create short cycles, discomfort, and less stable humidity control. The goal is to achieve a consistent temperature, good air circulation, and reliable operation.

The R32 refrigerant and new ducted installations

The GREE All Match Slim Duct R32 series is part of modern solutions that use the refrigerant R32. This type of refrigerant is associated with new generations of HVAC equipment and allows manufacturers to offer efficient, compact systems well suited to current residential needs.

In a ducted installation, R32 is only one element of the whole. Actual performance also depends on the duct network, sizing, refrigeration installation, vacuuming before commissioning, leak control, drainage, and the quality of connections. At AirGreen, we emphasize rigorous commissioning because a well-chosen system can be penalized by a sloppy installation.

An air network designed for comfort, not just for duct passage

In a house, air should not just arrive in the rooms. It must arrive with the right flow, in the right place, and at an acceptable noise level. The location of the supply and return air grilles strongly influences the perception of comfort.

For this installation in Anjou, our approach aimed to avoid common problems:

Rooms too hot or too cold

Poor balancing can create temperature differences between zones. A room at the end of the network may receive less air than a room closer to the unit. The design of the plenum and the choice of ducts help correct this risk.

Air noise at the grilles

A duct that is too small or an overly concentrated airflow can generate unpleasant noise. In a residential installation, acoustic comfort is as important as thermal comfort. Ducted systems are appreciated for their discretion, but this discretion depends on good design.

Performance losses

Air leaks, poorly insulated ducts, abrupt transitions, and excessive lengths can reduce system efficiency. Ducted systems must be treated as a precise technical network, not just simple accessories.

Difficult maintenance

A hidden system must remain accessible. The indoor unit, filter, fittings, drain, and service panels must be inspectable. Poorly planned access can complicate future interventions and increase maintenance costs.

AirGreen expertise tailored to ducted installations in Montreal, Laval, Longueuil, North Shore, and South Shore

Ducted installations require broader expertise than a standard wall mount. They combine refrigeration, ventilation, sheet metal work, drainage, insulation, control electricity, and building understanding. This is precisely what makes this type of project interesting for AirGreen.

Technical coordination from start to finish

In this project in Anjou, coordination began before the unit was installed. It was necessary to determine where to install the device, how to distribute the air, what path to give the ducts, where to position the grilles, how to ensure service access, and how to prepare the necessary metal parts.

The presence of the custom plenum shows that the installation was not treated as a generic solution. The network was adapted to the building. Each air outlet had a specific function. Each connection had to fit into a distribution logic.

This method is especially important in residential neighborhoods of Montreal, such as Anjou, Saint-Léonard, Mercier, Rosemont, Ahuntsic, or Plateau-Mont-Royal, where houses have often been renovated, expanded, or modified over the years. The original plans do not always reflect the reality of the site. Our technicians must therefore combine preparation, on-site observation, and professional adjustments.

The advantages of a ducted system for interior aesthetics

One of the great advantages of a GREE ducted heat pump is discreet integration. Once the project is completed, the occupants do not see the indoor unit. They only see supply and return grilles, chosen according to the available space and the desired visual result.

This solution is particularly suitable for customers who want:

• to keep walls clear;
• to avoid a wall unit in the living room;
• to air condition several rooms with a more integrated approach;
• to maintain a clean appearance;
• to improve comfort without changing the interior layout;
• to obtain a solution adapted to quality renovation.

In houses in Anjou, where living spaces can be open on the ground floor and more compartmentalized upstairs, a ducted system can meet needs that wall units do not always cover ideally.

The importance of the air return

The air return is a major technical point. It allows the unit to take back the air from the house to treat it again. If the return is undersized or poorly placed, the system may lack air, become noisier, or lose efficiency.

In a ducted installation, the return air must be designed with as much care as the supply outlets. It must provide sufficient passage, be accessible for the filter, and avoid areas where circulation would be blocked by closed doors, furniture, or partitions. This detail is often invisible to the client but directly affects daily comfort.

Subsidies, ENERGY STAR, and documentation

Certain models of GREE heat pumps may be eligible for subsidy programs depending on their certification, efficiency, capacity, and criteria in effect at the time of installation. AirGreen supports its clients in understanding applicable requirements and provides the necessary documents when the installed model meets the criteria.

For owners in Anjou, Montreal, Laval, Longueuil, on the North Shore and the South Shore, this step can have significant financial importance. A well-prepared subsidy application relies on accurate information: indoor model, outdoor model, detailed invoice, proof of payment, installation date, and compliance with program requirements. Our team knows that the quality of documentation can make a difference in processing the file.

Mistakes to avoid with a ductable installation

A ductable installation should never be improvised. The most common mistakes can harm performance from the first season.

Choosing the machine without analyzing the ducts

The GREE model must be compatible with the planned network. Static pressure, number of outlets, duct length, and grille type directly influence the choice.

Installing too many air outlets without balancing

Adding multiple grilles may seem advantageous, but each outlet must receive sufficient airflow. A poorly distributed network creates uncomfortable zones.

Neglecting insulation

Ducts passing through an unconditioned space must be well insulated. Poor insulation causes heat or cool loss even before the air reaches the room.

Forgetting the condensate drain

In air conditioning, the indoor unit produces condensation water. The drainage must be reliable, accessible, and properly sloped or pumped if necessary.

Block access to the service

An invisible installation must not become inaccessible. The filter, unit, drain, and fittings must remain checkable for maintenance.

An installation that reflects AirGreen's expertise

This project in Anjou shows a step that clients do not always see: the technical preparation before finishing. The metal plenum, circular outlets, measuring tools, still-packaged components, and the nearby outdoor unit remind us that a successful HVAC installation is built piece by piece.

AirGreen stands out for this rigor. We do not limit our work to equipment installation. We analyze the building, recommend the right type of system, prepare the components, install according to standards, verify operation, and remain available for after-sales service.

Our team regularly works in Montreal, Laval, Longueuil, on the North Shore, the South Shore, and in Montérégie for wall, multi-zone, central, and ducted installations. GREE ducted systems require precise knowledge of residential ventilation, and this experience directly translates into better results for the client.

Expected final result: stable comfort, discreet finish, and durable network

Once completed, this type of system offers a very different comfort from a visible wall unit. The air is distributed in the intended zones, the grilles blend discreetly inside, and the main equipment remains hidden. The client benefits from a clean solution, adapted to the building and designed to last.

In Anjou, this installation of a GREE All Match Slim Duct R32 ducted heat pump highlights the importance of network design. The custom plenum is not a minor detail: it is at the heart of air distribution. The ducts, fittings, static pressure, insulation, and maintenance access form a coherent whole.

For owners who want to improve their comfort without increasing the number of visible units, a GREE ducted solution is a serious option. With AirGreen, each project is evaluated based on the building's reality, the client's expectations, and the system's technical requirements.