Ductwork is designed to provide comfortable temperatures and preserve indoor air quality. Have you ever wondered how air ducts are formed or what they are made of? Today, Superior Air Duct Cleaning provides an overview of ductwork design, including the different shapes and materials.
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Air Duct Materials
Air ducts are usually made of sheet metal, but other metals can be used under certain circumstances. Here are the most popular types of duct materials and what they are used for:
Galvanized steel is the most common material used in ductwork fabrication. Steel ductwork expands and contracts as it heats and cools.
The next popular duct material is aluminum. Aluminum ductwork is often used for cleanroom facilities and special exhaust systems.
Next, stainless steel is a material used in air ducts for kitchen and fume exhaust. Some of these ducts are exposed while others are concealed.
Carbon Steel (Black Iron)
Carbon Steel is commonly used in applications that involve flue pipes and chimneys.
It might surprise you that not all ducts are made of metal. Fibreglass Reinforced Plastic (FRP) is mainly used for chemical exhaust and underground duct systems. Fabric ducting (aka textile ducts) is often made of absorbent polyester material and can be seen in laboratories, school cafeterias, or large offices. Lastly, some ducts are composed of a softer flex material. Flex ducts have an inner liner that is supported by a wire coil and covered by insulation. This flexible ductwork is used in both new construction and older homes.
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Air Duct Shapes
Ducts are typically formed by folding sheet metal into the required shape. The most common shapes are round, rectangular, and oval ducts. There are some advantages and disadvantages of each duct shape.
Round ducts are the most efficient in transporting air. They use less material than rectangular ducts to handle the same amount of air.
Square or rectangular ducts are designed to fit building construction. While they fit into walls and above ceilings, these ducts use more metal than round ducts to produce the same airflow rate.
Oval ducts are flat and have smaller height requirements than round ducts. These ducts tend to become more round when under pressure.
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Improve Your Health, Comfort, and Air Quality
Regardless of the shape and material, your air ducts need to stay clean and clear. Superior Air Duct Cleaning is dedicated to improving your health and air quality. For more information about our duct cleaning services, browse our website or call 1-800-803-3828.
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