Fan Horsepower

Written by Jerry Ratzlaff on . Posted in Pump

Fan horsepower, abbreviated as \(FHP\), for fans and blowers, is a measure of power or the rate of doing work.

 

Fan Horsepower formula

\(\large{ FHP = \frac{ 0.000157}{ \eta_p } \; CFM \; SP  }\)  
\(\large{ FHP = \frac{ CFM \; PSF }{ 33000 \; \eta_f }  }\)  
\(\large{ FHP = \frac{ CFM \; PIW }{ 6356 \; \eta_f }  }\)  

Where:

\(\large{ FHP }\) = fan horsepower

\(\large{ CFM }\) = cubic feet per minute

\(\large{ \eta_f }\)  (Greek symbol eta) = fan efficiency

\(\large{ PIW }\) = inches of water gauge

\(\large{ PSF }\) = pounds per square foot

\(\large{ \eta_p }\)  (Greek symbol eta) = pump efficiency

\(\large{ SP }\) = static pressure 

 

Tags: Equations for Pumps Equations for Horsepower