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How many connected vestibule systems can be combined under the same supply fan?

Question asked by eoin.mcnally on Oct 9, 2020
Latest reply on Oct 9, 2020 by milt.werner

Hi, I have been searching the NFPA codes and haven't been successful in finding any requirements for combing duct systems under the same supply fan which serve vestibules that connect different buildings. Is this possible or will they need to be independent?


Please provide any code references if possible, thank you.