The Eastern Sheet Metal Equivalent Round Duct Calculator app allows sheet metal contractors and installers, as well as heating, ventilation and air-conditioning (HVAC) engineers and contractors, to convert the dimensions of rectangular and flat oval ducts to round. It will also convert rectangular to flat oval. The app is available for Apple and Android systems.
As dimensions are entered, the app calculates the equivalent round diameter. If the volume flow rate and duct length are entered, the app calculates air velocity, friction rate and friction loss for standard air.
Where space limitations make conversion to round duct impossible, flat oval is the next efficient shape, providing many of the advantages of round with the ablility to fit the available space.
The Equivalent Round Duct Calculator app allows users to calculate conversions digitally rather than with a slide rule. The app lends itself to use in the field, because it does not require an online connection. However, if an internet connection is available, the app can also link users to the Eastern Sheet Metal website, where they can find tools that will calculate multiple solutions for the equivalent round diameter and a range of flat oval dimensions.
To download the app, search for “Equivalent Round” or visit here.