The building occupants are an important source of heat gain. Different buildings have different occupancy rates based on building use type and the activity involved. The default occupant density (occupied) values are taken from ASHRAE User’s Manual Table G-C.

Occupant Density (Occupied Hours): Area per person during occupied hours.

 Occupant Density (Unoccupied Hours): Area per person during unoccupied                  hours.
 

If a building is completely empty during unoccupied hours then input the total square footage of the building in 'Occupant Density (Unoccupied Hours)' tab to reflect that.

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