I have an eQuest model built up using the Design Development Wizard. Looking at the Component tree, most of the shells have one plenum zone for the entire floor. However, some of the shells have many plenum zones;they have a separate plenum zone matching each of the occupied space zones in the shell. I'm not aware of any difference in the way I constructed the various shells. Can anyone explain why the Wizard sometimes builds a single plenum for the shell and sometimes builds a plenum for each zone within the shell? I'd like to be able to choose between these options. Thanks for any help you can offer! Best regards, Molly Curtz Arup