Duct Friction Loss: 36
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) |
|---|---|---|---|---|---|---|---|---|---|---|
| 36 | 600 | 4,241.15 | 0.9144 | 0.100167 | 0.016376 | 0.012269 | Darcy-Weisbach + Haaland | 185,410.9 | 0.00009 | 3.048 |
| 36 | 800 | 5,654.87 | 0.9144 | 0.170209 | 0.015652 | 0.020849 | Darcy-Weisbach + Haaland | 247,214.5 | 0.00009 | 4.064 |
| 36 | 1,000 | 7,068.58 | 0.9144 | 0.257463 | 0.015153 | 0.031536 | Darcy-Weisbach + Haaland | 309,018.1 | 0.00009 | 5.08 |
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