Freeman formula for estimating the fire demand (Q) in litres per minute is given by

1
Q = 5663 \(\sqrt {\rm{P}}\)
2
Q = 2500 (P/5 + 10)
3
Q = 1136 (P/5 + 10)
4
Q = 3182\(\sqrt {\rm{P}}\)
5
Q = 1136 (P/5 + 20)

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