Air Duct Velocity Calculator.

SI Units

air volume (m3/s)
diameter (m)

or alternatively

side length - a (m)
side length - b (m)

Imperial Units

air volume (cfm)
diameter (in)

or alternatively

side length - a (in)
side length - b (in)

Air Duct Velocity Formula.

v i = q i / a i

= 576 q i / (π d i 2 )

= 144 Q i / (a ​​ i b i ) (1)

kung saan ang isang i = area of ​​duct (square feet), q i = air flow (cfm), v i = air velocity (ft / min), d i = diameter ng duct (pulgada), b i = lapad ng duct (pulgada), isang i = lapad ng maliit na tubo (pulgada)

Air Duct Velocity Calculator.