There are options to input the existing duct dimensions and one of either the airflow or velocity values to derive the calculated duct friction loss. In the 'Size by Dimensions' mode, you can analyze an existing duct system. The results include both the exact and rounded height and width (or diameter) dimensions, the equivalent diameter (for rectangular and oval duct) and the calculated velocity and friction loss. In the 'Size by Airflow' mode, you can specify the total airflow in CFM (or L/s), the aspect ratio and one of either the velocity of air or the friction loss per 100 feet (30 meters). Think of this application as a digital version of the classic Trane Ductulator. The Duct Sizer application allows you to quickly size one HVAC duct run using the constant friction method. Thousands of users have downloaded this useful application for performing quick and simple duct sizing analysis. The HVAC Duct Sizer app is the #1 selling duct sizing application for the Android OS.
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