Duct Size Calculator (SI & IP)
DUCT SIZE CALCULATOR (SI)
| A. AIR VOLUME | L/s |
| B. DUCT SIZE | W mm H mm |
| C. DUCT MATERIAL | |
| D. ABS ROUGHNESS | mm |
| E. EQUIVALENT DIAMETER | mm |
| F. HYDRAULIC DIAMETER | mm |
| G. DUCT VELOCITY | m/s |
| H. VELOCITY PRESSURE | Pa |
| I. REYNOLDS NO. | |
| J. FRICTION FACTOR | |
| K. DUCT FRICTION | 0.340 Pa/m |
For this calculation please check only duct friction & height factor
DUCT SIZE CALCULATOR (IP)
| A. AIR VOLUME | CFM |
| B. DUCT SIZE | W in H in |
| C. DUCT MATERIAL | |
| D. ABS ROUGHNESS | ft |
| E. EQUIVALENT DIAMETER | in |
| F. HYDRAULIC DIAMETER | in |
| G. DUCT VELOCITY | FPM |
| H. VELOCITY PRESSURE | in |
| I. REYNOLDS NO. | |
| J. FRICTION FACTOR | |
| K. DUCT FRICTION | 0.049 in/100 ft |
For this calculation please check only duct friction & height factor