AIR MOTION FORMULA for FANS


				AIR MOTION FORMULA for FANS



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		Simple Formulae to use: The air moving fan law formulae: Fan delivery in cfm varies directly as to the rpm fan speed: cfm_{2 NEW} = (rpm₂/ rpm₁) X cfm₁ = cfm₂Finding the New Static Pressure: SP₂ NEW = (rpm₂/ rpm₁)² X SP₁ = SP₂ -new Required fan blower motor horsepower (hp) varies as to the cube of the rpm or cfm: hp₂ -new = (rpm₂/rpm₁)³ *x hp₁ = hp_{2 -new}



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