Pressurisation ductwork

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Pressurisation ductwork (sheet metal) externally fireproofed with pressed vermiculite boards, stapled together.
Pressurisation ductwork made of Durasteel

Pressurisation ductwork is a passive fire protection system. It is used to supply fresh air to any area of refuge, designated emergency evacuation or egress route.

Purpose[edit]

The purpose of pressurisation ductwork is to maintain positive pressure in building spaces to prevent smoke from entering from other spaces in which a fire is occurring. It is typically used in exit stairways, corridors, and lobbies.

Requirements[edit]

Pressurisation ductwork is certified on the basis of fire testing such as ISO 6944.

Systems[edit]

There are two means of providing fire-resistance rated ductwork:

See also[edit]

External links[edit]