|  Zone  | 
 The water loop element id for the hot-water heating coil. 
 Namespace: Autodesk.Revit.DB.Mechanical
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.0.0.0 (25.0.0.0)
 Syntax
 Syntax   Exceptions
 Exceptions  | Exception | Condition | 
|---|---|
| ArgumentNullException | When setting this property: A non-optional argument was null | 
 See Also
 See Also