The Most Popular Type of Supply Duct System: A Comparative Ranking

Choose the type you think is the most popular!

Author: Gregor Krambs
Updated on Feb 21, 2024 06:41
Welcome to StrawPoll, where your opinion matters! We're excited to present our latest ranking on the most popular type of supply duct system. With a myriad of options out there, we want to know which one tops the list for you. From flexible ducts to sheet metal, insulated or non-insulated, we have it all covered. So, join thousands of other users in casting your vote, and if you think we missed an option, don't hesitate to suggest it. Let's dive into the world of supply duct systems and uncover the ultimate fan-favorite together. Happy voting!

What Is the Most Popular Type of Supply Duct System?

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    Fiberglass ducts are a type of supply duct system that is commonly used in HVAC applications. They are made from fiberglass-reinforced panels, providing a lightweight and durable solution for distributing air throughout a building. Fiberglass ducts are known for their excellent insulation properties, low air leakage rates, and resistance to corrosion and microbial growth.
    • Insulation: High efficiency insulation material
    • Duct material: Fiberglass-reinforced panels
    • Weight: Lightweight compared to other duct materials
    • Durability: High resistance to damage and wear
    • Air leakage: Low air leakage rates
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    Flexible ducts are a type of supply duct system used in HVAC (heating, ventilation, and air conditioning) installations. They are designed to be easily maneuverable and can be flexed to fit various installation requirements. These ducts are commonly made from a flexible plastic or a combination of plastic and metal, allowing them to be more flexible than traditional rigid ductwork.
    • Flexibility: Flexible ducts can be bent, twisted, and shaped to fit around obstacles and through tight spaces.
    • Lightweight: They are relatively lightweight, making them easier to handle and install compared to rigid ductwork.
    • Versatility: Flexible ducts can be used for various HVAC applications, including supply and return air distribution.
    • Cost-effective: They are typically more affordable than rigid ductwork and require less labor-intensive installation.
    • Insulated options: Flexible ducts are available with insulation, helping to minimize heat loss or gain during air distribution.
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    Fabric ducts

    Fabric ducts are a type of supply duct system that is made from lightweight fabric material instead of traditional metal or plastic ductwork. The fabric is typically made of a durable polyester material, which allows for flexibility and easy installation. Fabric duct systems distribute conditioned air throughout a space by using small perforations or vents along the length of the ducts to evenly distribute airflow. The fabric material also helps to dampen noise and reduce energy loss due to insulation properties.
    • Material: Polyester fabric
    • Flexibility: Easily bendable and flexible
    • Installation: Simple and quick installation
    • Air Distribution: Even and uniform distribution
    • Perforations: Small holes or vents for airflow
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    Spiral ducts are a type of supply duct system commonly used for HVAC (heating, ventilation, and air conditioning) applications. They are cylindrical in shape and constructed using a helical or spiral design, hence the name. These ducts are typically made from galvanized steel or aluminum and are known for their durability, high airflow capacity, and ease of installation.
    • Material: Galvanized steel or aluminum
    • Shape: Cylindrical, helical or spiral design
    • Durability: Strong and long-lasting
    • Airflow capacity: High, due to smooth interior surfaces
    • Installation: Easy and cost-effective
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    Rectangular ducts

    HVAC engineers and designers
    Rectangular ducts are a type of supply duct system commonly used in HVAC (Heating, Ventilation, and Air Conditioning) installations. These ducts are rectangular in shape and are used to distribute conditioned air from the central air handling unit to various rooms or areas within a building. They provide an efficient and effective means of delivering air to different spaces.
    • Shape: Rectangular
    • Material: Sheet metal (typically galvanized steel)
    • Sizes: Various sizes available to meet different airflow requirements
    • Insulation: Can be insulated to reduce heat gain/loss and noise transmission
    • Pressure classification: Rated based on maximum pressure the duct can withstand
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    Round ducts are a type of supply duct system commonly used in HVAC applications. As the name suggests, these ducts are cylindrical in shape and are primarily made from galvanized steel or flexible materials like aluminum or PVC. They are designed to distribute conditioned air from the HVAC unit to different areas of a building.
    • Material: Galvanized steel, aluminum, or PVC
    • Shape: Cylindrical
    • Size: Common sizes range from 4 inches to 24 inches in diameter
    • Installation: Installed either overhead or along walls
    • Airflow: Highly efficient in distributing airflow evenly
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    Plenum ducts are a type of supply duct system commonly used in commercial buildings. They are typically made of sheet metal and are designed to distribute conditioned air from the HVAC system to different areas of the building. Plenum ducts are installed in the space between the structural ceiling or floor and a drop-down ceiling or raised floor, known as the plenum. The plenum serves as an air distribution chamber and allows for a more efficient and concealed ductwork installation.
    • Material: Sheet metal (galvanized steel or aluminum) is commonly used for plenum ducts.
    • Shape: Rectangular or square-shaped.
    • Insulation: Plenum ducts may be insulated to reduce heat transfer and minimize condensation formation.
    • Size: Available in various sizes, depending on the airflow requirements of the building.
    • Connection: Typically connected to the HVAC system through round or oval supply ducts.
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    Sound attenuators, also known as silencers, are components used in HVAC systems to reduce the noise level produced by air movement within ducts. They are typically installed in the supply duct system to decrease sound transmission and create a more comfortable and quiet environment for occupants.
    • Sound reduction: Typically capable of reducing the noise level by 15-35 dB(A)
    • Construction: Made of acoustic material such as mineral wool or fiberglass
    • Shape: Common shapes include rectangular, circular, and flat-octagonal
    • Pressure drop: Creates a moderate pressure drop in the system, affecting airflow
    • Length: Available in various lengths depending on the required noise reduction
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    Duct silencers are a type of supply duct system component designed to reduce noise produced by airflow in HVAC systems. They consist of sound-absorbing materials enclosed in a metal or fiberglass casing, and are installed within the supply ductwork to minimize noise transmission.
    • Noise Reduction: Typical noise reduction of 15-30 decibels (dB)
    • Material: Constructed with sound-absorbing materials like fiberglass or mineral wool
    • Casing: Enclosed in a durable metal or fiberglass casing
    • Shape: Rectangular or cylindrical, depending on the design
    • Size: Available in various sizes, ranging from small domestic installations to large commercial applications

Missing your favorite type?


Ranking factors for popular type

  1. Efficiency
    An efficient supply duct system should distribute air evenly throughout the building while minimizing pressure loss.
  2. Ease of Installation
    The system should be easy to install and maintain, reducing labor costs and downtime.
  3. Cost
    The cost of the system, including initial installation as well as ongoing maintenance and repair expenses, should be considered.
  4. Durability
    The system should be able to withstand heavy use and last for a long time without needing frequent repairs.
  5. Noise Level
    The quieter the system, the better the experience for occupants.
  6. Compatibility
    The system should be compatible with other systems such as air cleaners and humidifiers.
  7. Flexibility
    The duct system should allow for flexibility in design and installation, allowing for customization to the specific needs of the building.
  8. Sustainability
    The system should be environmentally friendly and energy-efficient, minimizing waste and maximizing energy savings.

About this ranking

This is a community-based ranking of the most popular type of supply duct system. We do our best to provide fair voting, but it is not intended to be exhaustive. So if you notice something or type is missing, feel free to help improve the ranking!


  • 198 votes
  • 10 ranked items

Voting Rules

A participant may cast an up or down vote for each type once every 24 hours. The rank of each type is then calculated from the weighted sum of all up and down votes.


More information on most popular type of supply duct system

When it comes to HVAC systems, the supply duct system is an essential component. It’s responsible for distributing conditioned air throughout a building, ensuring that every room is comfortable and properly ventilated. There are several types of supply duct systems available, each with its own advantages and disadvantages. The most popular type of supply duct system is the flexible duct system. It’s affordable, easy to install, and can be easily adapted to fit into tight spaces. However, it may not be as durable as other duct systems, and may require more frequent maintenance. Rigid duct systems, on the other hand, are more durable and can last longer than flexible duct systems. They’re ideal for large commercial buildings, but can be more difficult to install and may require more space. Another popular type of supply duct system is the ductless mini-split system. It’s a great option for retrofitting existing buildings or adding heating and cooling to new construction. However, it can be more expensive than other options, and may not be as energy-efficient. Ultimately, the type of supply duct system that’s best for a particular building will depend on a variety of factors, including the size of the building, the climate, and the budget. It’s always a good idea to consult with a professional HVAC contractor to determine the best option for your specific needs.

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