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Natural smoke exhaust

PROVEN FACTS IN CASE OF FIRE

A fire can quickly spread when three elements are gathered :

  • heat
  • combustible fuel
  • oxygen contained in the air

90 000 fires occur in France each year.

A fire spreads quickly with heat and flames.

The smoke denseness and toxicity are directly responsible for 98% of the deaths during a fire (panic caused by visibility loss, suffocation, …)

 

 

3 minutes can be enough to completely fill a room/space with smoke.

 

constat

When a fire starts, it is therefore necessary to evacuate as quickly as possible :

 

  • smoke which limits visibility and leads people to panic
  • toxic gases
  • heat which can impair the building structure and/or create a “flash-over” phenomenon

GENERAL PRINCIPLES

In order to :

- facilitate people evacuation,

- facilitate emergency team intervention,

- prevent the fire from spreading,

 

The room/space natural smoke exhaust purpose is to evacuate as quickly as possible :

-smoke,

- toxic gases,

- heat

 

The room/space natural smoke exhaust is carried out by creating a sufficient sweeping out of the room/space to be freed from smoke with the help of the following joint devices:

- fresh air inputs located at the bottom of the room, and

- smoke and heat exhaust located on the upper part of the room.

Fresh air inputs and smoke exhausts must be simultaneously set.

The natural smoke exhaust operating rules and the required geometric area calculations (fresh air inputs and smoke/heat exhaust) must comply with the regulations associated with the type of building. These rules may vary according to the surface, the type and the usage of the room/space.