The software uses the Darcy-Weisbach equation and Moody chart approximations. You input the air volume (CFM/m³/s) and desired friction rate (typically 0.05 to 0.15 in. wg/100 ft). The software outputs:
This is the most critical section of this article. The keyword is searched thousands of times per month. However, the original software was commercial. Design Tools Duct Sizer Version 6.4 Free Download
A hidden gem in version 6.4 is the rudimentary NC estimator. It warns the user if the calculated velocity will likely generate audible noise in a given occupancy type (office, hospital, theater). The software uses the Darcy-Weisbach equation and Moody
💡 Use it alongside your CAD or Revit workflow to double-check duct sizes before coordination. The software outputs: This is the most critical
At its core, Duct Sizer Version 6.4 is built to solve the complex aerodynamic equations required to move air effectively through a network of ducts. The software typically utilizes the equal friction method, the velocity reduction method, or the static regain method to calculate dimensions based on user-defined inputs. Designers input critical parameters such as the required airflow rate in cubic feet per minute or liters per second, the desired air velocity, and the allowable friction loss per unit length. The software then instantly computes the required diameter for round ducts or the equivalent dimensions for rectangular and oval ducts. This automation drastically reduces the margin of human error associated with manual look-up tables and speeds up the drafting and design phases of a project.