Design conditions specified in your room properties, such as occupancy levels and heat gains, will likely have little or no impact on your PartL results.
The SBEM calculation engine ignores user defined design settings in order to ensure consistent comparison between buildings.
Activity types are taken from your building/room properties, and the subsequent PartL design criteria is taken from the relevant activity type tables in the NCM database, ultimately providing occupancy densities, profiles and heat gains for the SBEM calculation engine.
For example, please see Office room type below, from which the occupancy gains for PartL are determined using occupancy density and metabolic rates: