Changing Duct Offset in the Middle of a Duct Run
Ductwork in Design Master HVAC can either be centered, flat on the left side, or flat on the right side. See Inserting Eccentric Transitions for an example of using offset ductwork.
When the offset changes in the middle of the ductwork, the ductwork will look like this:
To prevent this, insert a duct at the break where the offset changes and set its Graphics ▾ to Transparent. In the following example, the transparent duct centerline is highlighted in red.