Class RbsDuctSizes being used to store the duct sizes

Namespace: Autodesk.Revit.DB.Mechanical
Assembly: RevitAPI (in RevitAPI.dll) Version: 21.0.0.0 (21.1.1.109)
Since: 2013

Syntax

C#
`public class DuctSizes : IEnumerable<MEPSize>, IDisposable`

Visual Basic
`Public Class DuctSizes _ Implements IEnumerable(Of MEPSize), IDisposable`

Visual C++
`public ref class DuctSizes : IEnumerable<MEPSize^>, IDisposable`

Inheritance Hierarchy

System Object
Autodesk.Revit.DB.Mechanical DuctSizes