IG-55 is an inert gas mixture consisting of 50% argon and 50% nitrogen. This type of extinguishant can be used as total flooding fire suppression systems protecting hazards against the most flammable substances. IG-55 suppression systems are particularly useful where an environmentally acceptable fire extinguishing system is essential, as it is a colourless, odourless, electrical non-conductive gas with a zero ozone depleting potential as well as a zero global warming potential.

 

This type of suppression system extinguishes a fire by reducing the oxygen concentration to a level that will no longer support combustion. Because IG-55 does not decompose when extinguishing a fire, there are no toxic or corrosive decomposition products created. Personnel within the space after discharge will be able to breathe normally.

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If more than one area within a building needs to be protected using suppression, this can be engineered by providing a single IG-55 system designed to extinguish the largest area. Adequately sized selector valves will be provided for each area, allowing the IG-55 suppressant to be directed into the area in a fire condition. This will provide significant cost and space savings.