- In the drawing area, select a piece of mechanical equipment, duct, flex duct, or duct fitting to connect the duct to.
- Right-click the connector where you want to connect the duct, and click Draw Duct or Draw Placeholder Duct.
Some components have multiple connectors that display stacked one above another. When drawing duct from a stacked connector, a Select Connector dialog displays to let you specify which connector to use.
- Drag the other end of the duct to the desired destination.
- Click to specify the end point for the duct.
For 2-line duct, transitions, tees, and elbows are automatically added to the segment.
Connecting vertical duct from an existing component
- Right-click a connector on an existing duct, flex duct, duct fitting, air terminal, or mechanical equipment, and click Draw Duct or Draw Placeholder Duct.
- Click Modify | Place Duct tab
Placement Tools
Automatically Connect. - Press the Spacebar to assume the size and elevation of the existing component. Tip: You can click Modify | Place Duct tabPlacement Tools panel
Inherit Elevation or 
Inherit Size to assume just the elevation or just the size. - On the Options Bar, specify an Offset that is above or below the start point, click Apply, and click Modify.
A vertical segment is automatically created, extending from the original offset to the newly applied offset. You can draw horizontal segments to continue the run at the new offset, or click Modify to place only the vertical segment.
When drawing duct from a component with multiple stacked connectors, a Select Connector dialog displays to let you specify which connector to use.