These properties apply to duct runs, ducting components, as well as to inline instruments and nozzles with ducting points. The properties are calculated as follows:
Equivalent Diameter = 1.3 * (Duct Height * Duct Width)^0.625 / (Duct Height + Duct Width)^0.25
Cross Section Area = (Duct Height * Duct Width)
The Equivalent Diameter and Cross Section Area properties are read-only.