System is a set of logically connected MEP elements.
Type parameter defines the system. A duct system could have a system type of Supply Air, Return Air, or Exhaust Air.
You create additional system types as needed. System name parameter identifies a system.
Using system you can perform calculations for duct and pipe sizing with pressure loss and static pressure.
MEP System Browser allows you to view and select MEP systems. It displays the System components with parameters. The browser can be accessed from the user interface right side together with Project Navigator tab.