Duct Friction Loss: 14
Duct friction loss data — pressure drop, velocity, and friction factors for round ducts at various diameters and airflows
| diameter in | velocity fpm | airflow cfm (cfm) | diameter m (m) | dp pa per m (Pa/m) | friction factor (dimensionless) | friction rate inwg per 100ft (inWG/100ft) | model | reynolds number (dimensionless) | roughness m (m) | velocity m s (m/s) |
|---|---|---|---|---|---|---|---|---|---|---|
| 14 | 600 | 641.41 | 0.3556 | 0.315509 | 0.020059 | 0.038646 | Darcy-Weisbach + Haaland | 72,104.2 | 0.00009 | 3.048 |
| 14 | 800 | 855.21 | 0.3556 | 0.53416 | 0.019103 | 0.065428 | Darcy-Weisbach + Haaland | 96,139 | 0.00009 | 4.064 |
| 14 | 1,000 | 1,069.01 | 0.3556 | 0.806035 | 0.018448 | 0.09873 | Darcy-Weisbach + Haaland | 120,173.7 | 0.00009 | 5.08 |
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