Duct Friction Loss: 38
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) |
|---|---|---|---|---|---|---|---|---|---|---|
| 38 | 600 | 4,725.48 | 0.9652 | 0.093857 | 0.016196 | 0.011496 | Darcy-Weisbach + Haaland | 195,711.5 | 0.00009 | 3.048 |
| 38 | 800 | 6,300.64 | 0.9652 | 0.159516 | 0.015484 | 0.019539 | Darcy-Weisbach + Haaland | 260,948.6 | 0.00009 | 4.064 |
| 38 | 1,000 | 7,875.8 | 0.9652 | 0.241319 | 0.014992 | 0.029559 | Darcy-Weisbach + Haaland | 326,185.8 | 0.00009 | 5.08 |
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