Pressurization fans are used to prevent the ingress of smoke into the evacuation routes during ﬁres in buildings. Pressurization fans help ensure that the smoke that is generated from the ﬁre is not distributed, the smoke is removed from the premises, safety of life is achieved and that the ﬁre can be responded to more easily. Connected to the ﬁre automation system, these fans are activated in case of ﬁre and prevent smoke ingress by creating the necessary positive pressure.
System's Principle: The objective is to prevent the smoke ingress into the ﬁre escape, to ensure that the people are evacuated in a smoke-free environment and to provide an access route in order for the ﬁre ﬁghters to respond to the ﬁre. As the stairwell is separated from the building sections with ﬂame retardant and smoke-proof doors, a positive pressure is applied to the stairwell with air supply, and smoke ingress into the stairwell from adjacent sections is prevented.
BUILDINGS WHERE THE PRESSURIZATION SYSTEM IS MANDATORY
- Excluding residences, in all buildings if the stairwell is taller than 30,50 m.
- Escape stairs that cover the basement ﬂoor, in buildings with more than 4 basement ﬂoors.
- Residences that are taller than 51,50 m.
- Emergency elevator shafts