Fire-resistant composite duct is a type of air duct composed of multiple materials, and its core feature is to have certain fire resistance performance. It can maintain a certain level of structural integrity in the event of a fire, delay the spread of the fire, and buy valuable time for personnel evacuation and firefighting rescue.

Fire-resistant composite ducts are usually composed of multiple layers of materials, and common structures include:
Inner layer: usually made of materials with fire-resistant properties, such as inorganic fibers, silicates, etc., to provide fire protection.
Intermediate layer: may contain insulation materials such as rock wool, glass wool, etc. to reduce heat transfer.
Outer layer: Made of metal plates, color steel plates, or inorganic non combustible material plates, providing mechanical strength and corrosion resistance.
The materials selected for fire-resistant composite air ducts have undergone strict screening and testing to ensure that they meet relevant fire prevention, insulation, and corrosion resistance standards.

Fire resistant composite ducts are used in fire and smoke exhaust systems of various buildings and industrial facilities, including but not limited to:
Commercial complexes: such as shopping centers, hotels, office buildings, etc.
Public facilities: such as hospitals, schools, sports centers, etc.
Industrial plants: such as electronics factories, pharmaceutical factories, food processing factories, etc.