Fires in buildings generate smoke which rapidly expend and capture over the structure as time progress. According to fire fatality study research smoke is the major killer in building fires. Therefore, in order to save people life, control systems have been designed and developed with several different methodologies in order separate the smoke from contact escaping routes during a fire event in order to allow people safe ways so they could quickly leave a building without assistance and without harming their health. NFPA 92 [2] defines smoke management as a smoke control method that utilizes natural or mechanical systems to maintain a tenable environment in the means of egress from a large-volume space or to control and reduce the migration of smoke between the fire area and communicating spaces. Moreover, the specific objectives to be achieved over the design interval time shall include one or more of the following:

• Containing the smoke to the zone of fire origin
• Maintaining a tenable environment within exit stairwells for the time necessary to allow occupants to exit the building.
• Maintaining a tenable environment within all exit access and smoke refuge area access paths for the time necessary to allow occupants to reach an exit or smoke refuge area.
• Maintaining the smoke layer interface to a predetermined elevation in large volume spaces