Addendum 47i, Test Exception for Ducts in Conditioned Space, adds an exception to the duct leakage test requirement when ducts are located within conditioned space to the exception provided by Standards ANSI/RESNET/ICC 301-2014 Addendum L-2018 and ANSI/RESNET/ICC 301-2019. The exception is time-limited and expires January 1, 2021. To view the Interim Addendum 47i visit: Addendum 47i – Test Exception for Ducts in Conditioned Space – Mandatory April 5, 2020
