Create Supply, Return, and Exhaust Duct Systems

Create duct systems to size and analyze ductwork in your project.

Video: Place Placeholder Duct

When you select an air terminal or piece of mechanical equipment that is not assigned to a system, you can:

• Draw duct to connect the components. If the duct is assigned to a system, the air terminals and mechanical equipment connected to it are added to the same system.
• Manually create a system using commands on the Create System panel on the ribbon. The type of component selected determines which type of system you can create. For example, when you select a return diffuser, Revit assumes you are creating a duct system. When you select a heat pump, Revit lets you choose between a creating a duct, power, or piping system.

1. Select one or more of the air terminals in a mechanical plan view.
2. Click the Modify tabCreate Systems Duct.
3. In the Create Duct System dialog, specify the following:
   • System Type: the type of air terminal selected in the view determines which System Type it can be assigned to. For a duct system, the default system types are Supply Air, Return Air, and Exhaust Air. If you select a supply air terminal, the System Type is automatically set to Supply Air.
   Note: You can also create custom system types to handle other types of components and systems.
   • System Name: uniquely identifies the system. Revit suggests a System Name or you can enter a name.
4. Click OK.

   The previously unassigned system is moved to the Mechanical folder in the System Browser.

5. Click Select Equipment, and select the mechanical equipment for the system.
   Note: If more than one connection is available for the selected mechanical equipment, in the Select Connector dialog, select a connector, and click OK.