The diameter of the circular duct to be calculated.
The width of the rectangular duct to be calculated.
The height of the rectangular duct to be calculated.
A definition of how tight the duct system is. Valid within the limits below.
| Tightness class | Max pressure | Min pressure |
|---|---|---|
| Pa | Pa | |
| A | 500 | -500 |
| B | 1000 | -750 |
| C | 2000 | -750 |
| D | 2000 | -750 |
It pressures inside the current duct.
The ambient air temperature.
The pressure on the duct from ambient air.
The largest allowable leakage flow that can occur through the duct per meter.
| Leakage: |  |
|---|