Occupant thermal comfort and indoor air quality are the primary objectives of an HVAC building design. CFD models are constructed to accurately predict the local ambient conditions (air velocity, radiant temperature, relative humidity) that would be experienced. These results, coupled with information on a person's metabolic rate and clothing index, are then assessed against comfort criteria. Occupant/ comfort (and safety) can also be effected by the presence of airborne pollutants. If a source of pollutants is present nearby, then Fluent CFD software can also be used to assess the impact of these pollutants.

Simulation of airflow patterns in a medical research laboratory animal holding room to test ventilation and optimize room capacity.
Courtesy of the Integrated Research Center at St. Jude Children's Research Hospital. CFD Analysis courtesy of CAES, Binghamton, New York, USA

Yoyogi stadium with double-crescent roof design.	Velocity field in stadium mode above the first floor showing a circulating airflow pattern. Courtesy of Shimizu Corporation

Path lines, colored by temperature, show differences of up to 5 °C throughout the seating area and orchestra pit of the Budapest Opera House.
Courtesy of Budapest University of Technology & Economics