You've got a non-combustible plenum conveying comfort air. The space is neither occupied or used for storage. The air-handler should have smoke detectors in the supply and return ductwork. Generally the plenum chambers are usually consider part of the equipment. I would think that NFPA 13, 2002 8.14.1.2.2 would easily apply.
Craig L. Prahl, CET Fire Protection Group Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [EMAIL PROTECTED] http://www.lg.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of A.P.Silva Sent: Friday, February 02, 2007 11:29 AM To: [email protected] Subject: Supply and return air plenums I posted this awhile back, but for some reason didn't get anything from the forum for a period of about two weeks. So I'm not sure if it got posted or if anyone replied. Anyway, here it is again: A mechanical penthouse has non-combustible supply and return air plenums, which are separated into compartments with filters. One compartment has a 150 hp supply air fan and another, a 50 hp return air fan. Both have electric motors. The compartments are fairly big, approx. 30 ft x 20 ft x 15 ft high. Should these air plenums be sprinklered? Any code sections to justify? Tony _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
