I should have checked the spelling before posting that 1st comment (damned auto correct) but I wouldn't say only the exhaust duct requires protection. It depends on the arrangement of the hood and filter screens. Often, the booth, the area behind the filter screens and the duct require sprinklers and they should be on a separate (independent) control valve. It really depends on the content of the fumes (flammability)
Bob Caputo -----Original Message----- From: Sprinklerforum <[email protected]> On Behalf Of Dennis Wilson via Sprinklerforum Sent: Friday, December 3, 2021 10:48 AM To: [email protected] Cc: Dennis Wilson <[email protected]> Subject: RE: Paint Booth Duct Protection Only the exhaust duct is normally sprinklered. -----Original Message----- From: Sprinklerforum <[email protected]> On Behalf Of Bob Caputo via Sprinklerforum Sent: Thursday, December 2, 2021 12:23 PM To: [email protected] Cc: Bob Caputo <[email protected]> Subject: Re: Paint Booth Duct Protection Generally, if the exhaust duct Carrie's flammable or combustible vapors it does On Thu, Dec 2, 2021 at 9:49 AM Jerry Van Kolken via Sprinklerforum < [email protected]> wrote: > I have a paint booth with a intake and exhaust duct systems. > > When I look at NFPA 33-9.5.1.6 Duct Protection > > It only specific size of duct requiring protection, and doesn't > mention "exhaust" until item #2 and #3. > > If larger enough does both set of ducting require protection? > > > Jerry Van Kolken > Millennium Fire Protection Corp. > 2950 San Luis Rey Rd. > Oceanside, CA 92058 > (760) 722-2722 FX 722-2730 > > CONFIDENTIALITY NOTICE This e-mail and any attachments are for the > sole use of the intended recipients and contain information that may > be confidential or legally privileged. 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