The gas viscosity of the asset. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2013 
Syntax
Remarks
 Values are in kilograms per feet-second (kg/(ft · s)) and must be non-negative. 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentOutOfRangeException | When setting this property: The given value for gasViscosity must be non-negative. | 
| Autodesk.Revit.Exceptions InapplicableDataException | When setting this property: the asset must be gas to set this property. |