It has always been seen as a plenum around here. On Fri, Aug 18, 2023 at 4:43 PM rick matsuda <[email protected]> wrote:
> I would design using the duct criteria since the pit is after the > filters. I think it's considered the plenum which is part of the exhaust > ductwork. > Just my opinion. > rick > > On Fri, Aug 18, 2023 at 4:37 PM Anthony Johnson < > [email protected]> wrote: > >> The pit has a metal grate over it with the filters being installed just >> below the grate. It then turns the corner and goes up out the exhaust >> stack. I would normally just consider the exhaust stack as the exhaust >> 'duct' and not the entire pit but then I got to thinking. On a friday >> afternoon that's probably a bad idea. >> >> >> >> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> >> Virus-free.www.avg.com >> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> >> <#m_-1337165461309274980_m_-5211560169863844847_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >> >> On Fri, Aug 18, 2023 at 2:20 PM BRUCE VERHEI <[email protected]> wrote: >> >>> I’d expect the underfloor to have two sections. One the plenum, is >>> immediately below the filter bank. >>> >>> The second is the exhaust duct. >>> >>> Best. >>> >>> bv >>> >>> On 08/18/2023 12:50 PM PDT Rick Matsuda <[email protected]> wrote: >>> >>> >>> >>> Yes, install sprinklers in the pit and along any “ductwork” that goes >>> from the pit to the exterior. >>> >>> On Aug 18, 2023, at 2:43 PM, Anthony Johnson < >>> [email protected]> wrote: >>> >>> Hi Folks, >>> Quick one for the day - is a paintbooth pit to be considered as a duct? >>> I know most people, at least I do, think of a duct as a cylindrical or >>> rectangular sheet metal tube for ventilation. A quick google dictionary >>> defines it as a tube or 'passageway' for converting air, liquid whatever. >>> That leads me to the question of whether a downflow paintbooth pit would be >>> considered a duct for design purposes and would require the duct protection >>> criteria of NFPA 33 which requires a minimum of 30 gpm at 15 psi for the >>> sprinklers? >>> >>> Best Regards, >>> Anthony Johnson >>> Mountain Fire Protection >>> 'Saving Lives and Valuing Property' >>> >>> >>> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> >>> Virus-free.www.avg.com >>> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> >>> >>> _________________________________________________________ >>> SprinklerForum mailing list: >>> >>> https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org >>> To unsubscribe send an email to >>> [email protected] >>> >>> >>> _________________________________________________________ >>> SprinklerForum mailing list: >>> >>> https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org >>> To unsubscribe send an email to >>> [email protected] >>> >>> >>> _________________________________________________________ >>> SprinklerForum mailing list: >>> >>> https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org >>> To unsubscribe send an email to >>> [email protected] >> >> >> _________________________________________________________ >> SprinklerForum mailing list: >> >> https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org >> To unsubscribe send an email to >> [email protected] > > > _________________________________________________________ > SprinklerForum mailing list: > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > To unsubscribe send an email to > [email protected] -- Greg McGahan *Genesis Fire Services, LLC* *4912 Glover Lane. Milton, FL **32570* *P- 850-637-8535* *C- 850-712-9555*
_________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to [email protected]
