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Pressure requirement for Combined sprinkler and FHR system

Question asked by shafeeq on Nov 5, 2020
Latest reply on Nov 8, 2020 by nocivus

Hi..

As per NFPA 13 , 100gpm flow is considered for hose stream (inline with AHJ) in addition to the sprinkler demand. Accordingly, hydraulic calculations are prepared. Is it necessary to achieve minimum residual pressure of 65 psi where the FHR nodes are provided ? Or any residual pressure with  50 or 100 gpm is acceptable ?

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