I think just the sprinklers in the space. As you mentioned, the Phantom Flow does not apply as this is specific application.
R/ Matt Matthew J. Willis, CWBSP, C.E.T. Ferguson Fire Design, LLC D: (602) 337-0721<(602)%20337-0721> C: (307) 236-8249<(307)%20236-8249> [email protected]<mailto:[email protected]> From: Steven Jenkins <[email protected]> Sent: Tuesday, July 2, 2024 3:03 PM To: [email protected] Subject: [Sprinklerforum] ESFRs for space with less than 12 sprinklers Caution: This email originated from outside of the organization. DO NOT click links or open attachments unless you recognize and trust the sender. ________________________________ 2019 NFPA 13-27.2.4.4 requires the design area to have the 12 most hydraulically demanding sprinklers (sometimes more) when using the ESFR method. What if the physically separated space requires fewer than 12 sprinklers to cover the area (only 1000 sq ft, for instance)? If we have fewer than 12 ESFR sprinklers how is 27.2.4.4<http://27.2.4.4> complied with? 27.2.4.2.4 does not seem to apply as the ESFR is not a Density/area method. If the space protected by ESFR sprinklers is separated from other spaces by solid partitions, 19.2.2 suggests that the design area need not extend past those walls.
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