Use the Duct tools to draw ductwork in a project to connect air terminals and mechanical equipment. Ducts can be drawn horizontally and vertically. Draw placeholder duct in the early design stage to indicate the approximate location of a duct run, or to show a layout that has not been fully sized. Placeholder duct shows as single-line geometry.
You can draw horizontal and vertical ducts using the Duct or Duct Placeholder tools on the Home tab HVAC panel, or by using the Draw Duct or Draw Duct Placeholder option from the shortcut menu when right-clicking the connector on duct ends, duct fittings, air terminals, mechanical equipment, and duct accessories.