Pressurisation ductwork
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Pressurisation ductwork (sheet metal) externally fireproofed with pressed vermiculite boards, stapled together.
Pressurisation ductwork made of
Pressurisation duct work 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[]
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[]
Pressurisation ductwork is certified on the basis of fire testing such as ISO 6944.
Systems[]
There are two means of providing fire-resistance rated ductwork:
- Inherently fire-resistant, or proprietary factory assembled ducts which are made of sheet metal shells filled with mixtures of rockwool, fiber and silicon dioxide
- Sheet metal duct with exterior fireproofing materials such as blanket rockwool, ceramic fiber, or in-tumescent paint.
See also[]
External links[]
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Categories:
- Active fire protection
- Pressure
- Heating, ventilation, and air conditioning