Duct Friction Loss: 8
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) |
|---|---|---|---|---|---|---|---|---|---|---|
| 8 | 600 | 209.44 | 0.2032 | 0.629356 | 0.022864 | 0.077089 | Darcy-Weisbach + Haaland | 41,202.4 | 0.00009 | 3.048 |
| 8 | 800 | 279.25 | 0.2032 | 1.062799 | 0.021719 | 0.130181 | Darcy-Weisbach + Haaland | 54,936.6 | 0.00009 | 4.064 |
| 8 | 1,000 | 349.07 | 0.2032 | 1.601069 | 0.02094 | 0.196112 | Darcy-Weisbach + Haaland | 68,670.7 | 0.00009 | 5.08 |
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