Air Duct Flow Calculator.

SI Units

air velocity (m/s)
diameter (m)

or alternatively

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

Imperial Units

air velocity (ft/min)
diameter (in)

or alternatively

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

Air flow sa air ducts formula.

v i = q i / a i = 576 q i / (π d i 2 ) = 144 q i / (a ​​ i b i )

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

Air Duct Flow Calculator.