Appliance Use (Occupied Hrs): Appliance intensity during occupied hours. These can include things that turn on after the occupants arrive, like computer monitors, coffee machine etc.
Appliance Use (Unoccupied Hrs): Appliance intensity during unoccupied hours. These can include things that don't turn off after the occupants leave, like servers, refrigerators etc.
Following table from ASHRAE User's Manual (Table G-C) contains the recommendations for Appliance Use Density values for different building types:
The default value for appliance use for the use types such as Apartments (Mid-Rise and High-Rise) and Single-Family Home have been determined after the calibration with respective Pacific Northwest National Laboratory (PNNL) building prototypes.