
Click Tools > Flow Calculator.

On the Calculate Flow dialog box, select one of the following methods:

Flow rate and velocity >= diameter and loss per length

Flow rate and loss per length >= diameter and velocity

Flow rate and diameter >= velocity and loss per length


If you selected the first method, type the values in the Flow rate and Velocity boxes.

If you selected the second method, type the values in the Flow rate and Press loss per length boxes.

If you selected the third method, type the values in the Flow rate and Diameter boxes.

Click Calculate.

Review the results for the first method in the Diameter and Press loss per length boxes, for the second method in the Diameter and Velocity boxes, and for the third method in the Velocity and Press loss per length boxes.

Review the possible combination of shape conversion for a rectangle and flat oval ducts. Values dynamically change in the Width ratio, Corner radius, Width, and Depth boxes.

For additional estimates, change the values in the Inputs boxes.

When you have completed the estimates, click Close.