Duct Friction Loss: 28
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) |
|---|---|---|---|---|---|---|---|---|---|---|
| 28 | 600 | 2,565.63 | 0.7112 | 0.135657 | 0.017249 | 0.016616 | Darcy-Weisbach + Haaland | 144,208.4 | 0.00009 | 3.048 |
| 28 | 800 | 3,420.85 | 0.7112 | 0.230304 | 0.016472 | 0.02821 | Darcy-Weisbach + Haaland | 192,277.9 | 0.00009 | 4.064 |
| 28 | 1,000 | 4,276.06 | 0.7112 | 0.348156 | 0.015937 | 0.042645 | Darcy-Weisbach + Haaland | 240,347.4 | 0.00009 | 5.08 |
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