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Air Flow Head Loss

The calculator below can be used to calculate the head loss in a duct, pipe or tube. Default values for air flow 20oC, 1.2 kg/m3 and 6 m/s.
Friction coefficient calculated with the Colebrook equation.

The calculator is generic and can be used for both SI and Imperial units. Just substitute the values with the values for the actual application.

friction coefficient - λ
length pipe/duct (m, ft)
hydr. diameter (m, in)
velocity (m/s, ft/min)
SI-units
Imperial units

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