Duct Friction Loss: 34
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) |
|---|---|---|---|---|---|---|---|---|---|---|
| 34 | 600 | 3,783 | 0.8636 | 0.107308 | 0.016568 | 0.013144 | Darcy-Weisbach + Haaland | 175,110.3 | 0.00009 | 3.048 |
| 34 | 800 | 5,044 | 0.8636 | 0.182305 | 0.015833 | 0.02233 | Darcy-Weisbach + Haaland | 233,480.3 | 0.00009 | 4.064 |
| 34 | 1,000 | 6,305 | 0.8636 | 0.275723 | 0.015326 | 0.033773 | Darcy-Weisbach + Haaland | 291,850.4 | 0.00009 | 5.08 |
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