What are the primary factors that influence indoor design conditions for office buildings and commercial facilities?

The primary factors that influence indoor design conditions for office buildings and commercial facilities include occupant density, activity level, and equipment heat gains. For example, a densely occupied office space with many computers and printers will require a different indoor design condition than a lightly occupied commercial facility with minimal equipment. Other factors such as outdoor climate, building orientation, and window size also play a role in determining the indoor design conditions.