The outdoor airflow standard. 
   Namespace:   Autodesk.Revit.DB.Analysis  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 18.0.0.0 (18.2.0.0) 
  Since:  2018 
Syntax
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Exceptions
| Exception | Condition | 
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| Autodesk.Revit.Exceptions ArgumentOutOfRangeException | When setting this property: A value passed for an enumeration argument is not a member of that enumeration |