Erase Double Line (Window)

The Erase Double Line (Window) command is used to erase the 2D ductwork for all of the ducts in a windowed area.

To erase the 2D graphics for ducts, go to
Ribbon: DM HVAC→Ducts→  Erase Double Line (Window)
Pulldown Menu: DM HVAC→2D Drafting→Erase Double Line (Window)

You will be prompted to specify the first point of the window around the 2D ductwork to erase.

First crossing point around double line to erase:

You will then be prompted to specify the second point of the window.

Second crossing point:

All of the 2D ductwork that is inside or crossed by the window will be erased.