A 2D diagram of a 3D model is always the easiest and quickest way to check your design.

With Schematic Tools, you can:

•  Quickly create a schematic from Revit models by just selecting the first piece of the system.
•  Check the flow quantities or duct velocities of your system by using this tool. The app will read the flow quantities from the air terminals and add them up through the duct system. 
• Change model parameters directly on the schematic.  
• Show the flow arrows on the schematic and get the app to place the arrows for you on the 2D view. 
• Export the excel schedule of the ductwork system and calculate the pressure loss of the system.