Can plastic duct be used as a clothes dryer exhaust duct?
No, dryer exhaust duct must be made of metal and shall have a smooth interior surface. However transition ducts, not exceeding 8 feet in length may be used inside the dryer/laundry room and shall not be concealed within construction. (Transition duct; is a flexible connector used as a transition between the dryer outlet and the connection point to the exhaust duct system. Transition ducts must be listed and labeled for the use; transition ducts are currently listed to comply with UL 2158A).

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