Duct Friction Loss: 6
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) |
|---|---|---|---|---|---|---|---|---|---|---|
| 6 | 600 | 117.81 | 0.1524 | 0.900739 | 0.024543 | 0.11033 | Darcy-Weisbach + Haaland | 30,901.8 | 0.00009 | 3.048 |
| 6 | 800 | 157.08 | 0.1524 | 1.518903 | 0.02328 | 0.186048 | Darcy-Weisbach + Haaland | 41,202.4 | 0.00009 | 4.064 |
| 6 | 1,000 | 196.35 | 0.1524 | 2.286023 | 0.022424 | 0.280011 | Darcy-Weisbach + Haaland | 51,503 | 0.00009 | 5.08 |
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