To Add a Parallel Duct Run

1. Add duct, and begin laying out the duct run, as explained in Drawing a Duct Run.
2. In the Properties palette, specify the offset:

   To...	then...
   offset the new run at a horizontal distance (X or Y direction) from the existing run; both runs are at the same elevation	for Horizontal, specify a value for Offset. To offset the new run in a positive X or Y direction from the existing run, enter a positive value. To offset in a negative X or Y direction, enter a negative value.
   offset the new run at a vertical distance from the existing run; both runs have the same X-Y dimensions, but are at different elevations	for Vertical, specify a value for Offset. To offset the new run in a positive Z direction from the existing run, enter a positive value. To offset in a negative Z direction, enter a negative value.

3. In the drawing, select a point on the existing duct run.

   You can use AutoCAD MEP 2023 toolset snaps to select duct connectors, or object snaps to select points on duct geometry.

4. Continue selecting points along the duct run.
Note: Drawing a parallel duct run may be easier if you use a 1-line display for the existing duct run. This reduces the potential number of points to pick, and allows you to accurately select transition points. To view a duct system as 1-line, change the current display configuration. The Mechanical - Duct 1-line display configuration included with the default Aecb Model drawing template is configured to show duct segments and fittings as 1-line.