The two main categories of smoke management systems used in buildings are pressurization systems and exhaust systems for atria (and other large spaces). In general, this paper addresses the pressurization systems and related efforts. However, one atrium project was cause that project was funded by included in Table 1 be- ASHRAE. Additionally, airflow has been used with the intention of preventing smoke flow through open doors, and this topic is discussed including the concern of supplying combustion air to the fire.