Fan Horsepower
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