scope:

Specifies requirements and test methods for strength and air leakage of circular ductwork used in air conditioning and ventilation systems in building. Is intended to establish the mechanical strength and leakage required to verify the fitnes for the intended service as installed duchtwork. It is intended for testing specific installations as well as product series ingeneral under in-situ or laboratory conditions. The requirements and methods are applicable also to rectangular ductwork in respect of air leakage.