NFPA 91 says 75in² or larger or just under 10" diameter
-----Original Message----- From: Todd Williams [mailto:[email protected]] Sent: Tuesday, March 15, 2016 8:41 AM To: [email protected] Subject: Minimum duct size for sprinklers I am working with a facility that makes envelopes and other office paper products. They have an exhaust duct system which feeds twin collectors outside. The collectors have built in sprinklers and 1" outlets to connect to. The owner wants to connect to the sprinklers in the collector, but a contractor told them they should sprinkler all of the ductwork as well. The largest feed ducts are 16" round, decrease down to 11" round and connect to the machines with smaller duct (all round). My question is what is the minimum size duct you should install a sprinkler in? NFPA 654 had no guidance. Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080 (ofc) 860-608-4559 (cell) Sent using CloudMagic [https://cloudmagic.com/k/d/mailapp?ct=ti&cv=6.0.64&pv=8.2] _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
