The input data used by external servers for calculation of the duct fitting and duct accessory coefficient. 
   Namespace:   Autodesk.Revit.DB.Mechanical  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2014 
Syntax
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Remarks
 width, height, diameter, flow, velocity pressure and connector index are input data for the calculation,