Revit 2026 API
Duct |
Creates a new instance of duct insulation.
Namespace: Autodesk.Revit.DB.Mechanical
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.0.4.0 (26.0.4.0)
Syntax
public static DuctInsulation Create( Document document, ElementId ductOrContentElementId, ElementId ductInsulationTypeId, double Thickness )
Public Shared Function Create ( document As Document, ductOrContentElementId As ElementId, ductInsulationTypeId As ElementId, Thickness As Double ) As DuctInsulation
public: static DuctInsulation^ Create( Document^ document, ElementId^ ductOrContentElementId, ElementId^ ductInsulationTypeId, double Thickness )
static member Create : document : Document * ductOrContentElementId : ElementId * ductInsulationTypeId : ElementId * Thickness : float -> DuctInsulation
Parameters
- document Document
- The document.
- ductOrContentElementId ElementId
- The duct , fitting or accessory ElementId to which insulation will be added.
- ductInsulationTypeId ElementId
- The duct insulation type. If the input duct insulation type is InvalidElementId, the default insulation type from the document will be used.
- Thickness Double
- The thickness of the insulation.
Return Value
DuctInsulationThe newly created duct insulation.

Exception | Condition |
---|---|
ArgumentException | This id does not represent a duct, fitting, or accessory element. -or- This duct insulation type is invalid. -or- Thickness is not valid for assignment to insulation or lining elements. |
ArgumentNullException | A non-optional argument was null |
InvalidOperationException | The document is in failure mode: an operation has failed, and Revit requires the user to either cancel the operation or fix the problem (usually by deleting certain elements). |
ModificationForbiddenException | The document is in failure mode: an operation has failed, and Revit requires the user to either cancel the operation or fix the problem (usually by deleting certain elements). -or- The document is being loaded, or is in the midst of another sensitive process. |
ModificationOutsideTransactionException | The document has no open transaction. |
See Also