While CONTAM was developed for indoor air quality purposes, it is probably the most extensively used computer program for analysis of smoke control systems in the world. CONTAM can analyze conventional pressurization systems that use pressure differences at barriers to restrict smoke movement. These systems include pressurized stairwells, pressurized elevators, and zoned smoke control. CONTAM can also be used to design systems intended to maintain tenability. Analysis of tenability systems includes people movement calculations, tenability calculations, and smoke transport calculations. For a specific fire with generation of soot and toxic gases, CONTAM can calculate smoke transport throughout a complex building. An example analysis is discussed. Attention needs to be paid to the details of the simulation to ensure that the CONTAM model is appropriate for the specific application.Units: Dual