Fire rated air flow ducts These ducts Engage in a critical part in preventing the unfold of fire between diverse compartments of a building. Standard metallic sheet ducts, when subjected to fires, could deform and heat up, turning out to be unsuitable to be used in fire compartments. Fire-rated ductwork https://fire-resistant-ductwork-m13445.blogdeazar.com/39748374/fire-rated-insulation-for-ductwork-for-dummies