An enumerated type listing all duct loss calculation methods for a connector. 
   Namespace:   Autodesk.Revit.DB.Mechanical  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
Syntax
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Members
| Member name | Description | 
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| NotDefined | Duct loss method is undefined. | 
| SpecificLoss | Duct loss method is specified. | 
| Coefficient | Duct loss method depends on the loss coefficient. |