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How To Size a Fan
The horsepower fan can be calculated from the following equations:
Let's now find the hp for a fan.
If the flow rate is 0 ft3/min, with a ΔP of 0 psi then the design hp = 0
If the flow rate is 0 ft3/min, with a ΔP of 0 in H2O then the design hp = 0