Indicates if to specify the setting for simplified curtain systems. 
   Namespace:   Autodesk.Revit.DB.Analysis  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2012 
Syntax
Remarks
 Curtain Walls and Curtain Systems are normally exported as several openings, panel by panel, while for energy analysis all you need is one giant window. A curtain wall with 50 panels gets exported as 50 openings, while 1 opening with the total opening area would be more appropriate. When this setting is on, one "large" window/opening will be exported for a curtain wall/system