Duct Friction Loss: 46
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) |
|---|---|---|---|---|---|---|---|---|---|---|
| 46 | 600 | 6,924.59 | 1.1684 | 0.074613 | 0.015586 | 0.009139 | Darcy-Weisbach + Haaland | 236,913.9 | 0.00009 | 3.048 |
| 46 | 800 | 9,232.79 | 1.1684 | 0.126893 | 0.01491 | 0.015543 | Darcy-Weisbach + Haaland | 315,885.2 | 0.00009 | 4.064 |
| 46 | 1,000 | 11,540.99 | 1.1684 | 0.192051 | 0.014443 | 0.023524 | Darcy-Weisbach + Haaland | 394,856.5 | 0.00009 | 5.08 |
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