What is a Spiral duct?

Spiral duct is an inexpensive duct made by spirally winding a strip-shaped metal plate using the flexible characteristics of thin metal. Spiral duct Because it is thin and lightweight, it is the most common type of duct used in various parts of buildings and factories. Other ducts include bellows type flexible ducts and ducts made of plastic such as vinyl chloride, but considering the lightness and price, spiral ducts are used for air ducts unless there are special circumstances.

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