Can someone provide me with insight regarding the applicable obstruction
rules for ventilation ducts made of fabric? It seems that the issues are
not the same
as metal ducts but I cannot find any reference in NFPA 13 that addresses
these ducts as being different.
David Bitton, ing./Eng.
Les services de prévention des sinistres Quest inc.
5100, rue de la Savane, bureau 200
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