You can convert a section of rigid duct to flexible duct.
- In the Project Browser, expand Views (all)
Floor Plans, and double-click the mechanical view where you want to convert a rigid duct to a flexible duct.
- Click Systems tab
HVAC panel![](../images/ac.menuaro.gif)
(Convert to Flex Duct), and on the Options Bar, enter the length of the flex duct segment for Length. A warning alert displays if you enter a length greater than the value for Maximum Flex Duct Length specified on the Options Bar.
- Select the air terminal to which the duct that you want to convert is connected.
The section of duct is converted to a flexible duct section.