Gaseous fire suppression, also called clean agent fire suppression, is a term to describe the use of inert gases and chemical agents to extinguish a fire. Unlike conventional system that use water, in Gas Based Fire Suppression System; water is never used and yet the fire is extinguished. Here Gas is used to extinguish the fire. Hence it is a Gas Based system. The fire gets extinguished, within a minute of activation and everything is automatic.

There are four means used by the agents to extinguish a fire. They act on the "fire tetrahedron":

• Reduction or isolation of fuel. No agents currently use this as the primary means of fire suppression.
• Reduction of heat. Representative agents: Clean agent FS 49 C2 (NAF S 227, MH227, FM-200), Novec 1230, pentafluoroethane (NAF S125, ECARO-25).
• Reduction or isolation of oxygen: Representative agents: Argonite / IG-55 (ProInert), CO2 carbon dioxide, IG-541 Inergen, and IG-100 (NN100).
• Inhibiting the chain reaction of the above components. Representative agents: FE-13, 1,1,1,2,3,3,3-Heptafluoropropane, FE-25, haloalkanes, bromotrifluoromethane, trifluoroiodomethane, NAF P-IV, NAF S-III, NAF S 125, NAF S 227, and Triodide (Trifluoroiodomethane).
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