You can set a filter on the Simulated Impact list in ITA Capacity to show only the equipment that you want to see.
In the Search... field of a column, start typing some characters of the equipment you want to see. The table shows all items that contain the typed characters in the column that is searched.
The simulation is only as accurate as the source information (the data provided in the data center model). A simulation, although a helpful and informative tool, may not be accurate and only shows eventual real effects.