Area/Density Curve Calculator

Determine design density and area per NFPA 13 area/density curves for OH, LH, and EH occupancies.

Input Parameters

Results

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Design Density
gpm/sq ft
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Sprinkler Demand
gpm
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Total Water Demand
gpm
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Water Volume Required
gallons
Note: The area/density curves in NFPA 13 define the minimum design parameters. Select an operating point on or above the curve. Hose stream allowances per NFPA 13 Table 11.2.3.1.2: LH=100gpm, OH=250gpm, EH=500gpm.

Reference

NFPA 13 Figure 11.2.3.1.1 Area/Density Curves LH: 0.10 gpm/ft2 over 1500 ft2 OH1: 0.15 to 0.10 gpm/ft2 over 1500-4000 ft2 OH2: 0.20 to 0.15 gpm/ft2 over 1500-4000 ft2 EH1: 0.30 to 0.20 gpm/ft2 over 2500-5000 ft2 EH2: 0.40 to 0.25 gpm/ft2 over 2500-5000 ft2 Total Demand = (Density x Area) + Hose Stream