The application is used for calculating air velocities in fabric ducting and diffusers. Upon entering a given airflow, the velocity for the given size is displayed. Upon changing the size, we get the velocity for the given airflow. Values can be entered by moving the ruler or by typing particular values.
The color of the speed scale signalizes suitability of the calculated velocity. Red means an unacceptable, orange risky and green suitable velocity. Blue signalizes excessively dimensioned.
You can modify the cross section by clicking on the cross section picture. By clicking on the units, their offer is analogously displayed.
The calculations are exact and rounded to the values used in real life. Nevertheless, the speed evaluation is only informative.