How to combine the rooms within VistaPro?
When viewing any room variables, you can choose to toggle the combine rooms on/off on the VistaPro toolbar:
Useful link
Combine Options

The combine functionality allows to you to combine multiple variables in certain ways.
Openings:
This option allows you to combine all opening results in the same surface to provide a single output for each selected variable(s).
Rooms:
This option allows you to combine all room level variable results to provide a single output for all the selected rooms.
Note: If your room browser is in a grouping scheme mode, for example ‘Floors’ or ‘Types’, then results will be combined by all selected rooms in each room group.
Variables:
This option allows you to combine variable results that have the same units.
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