Hydraulic Remote Area Calculator

Calculate the hydraulically most remote area dimensions and sprinkler count per NFPA 13.

Input Parameters

Results

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Remote Area Length
ft
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Remote Area Width
ft
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Sprinklers in Remote Area
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Min End-Head Pressure
psi
Note: The 1.2 multiplier ensures the remote area is elongated along the branch line direction. For gridded systems, the remote area shape may be adjusted. Always verify the most hydraulically demanding area by checking multiple configurations.

Reference

NFPA 13 Section 28.2.4.2.1: Remote Area Length L = 1.2 × sqrt(A) Sprinklers per branch = ceil(L / sprinkler spacing) Branches in area = ceil(W / branch spacing) W = A / L Min end-head pressure P = (Q/K)^2 Q_min = density × coverage area per sprinkler