IG 55 fire suppression system uses an inert gas that offers effective fire protection with zero environmental impact. It is a simple blend of 50% Argon gas and 50% Nitrogen gas with a density similar to that of air. Both Argon and Nitrogen are clean, natural gases that are readily available throughout the world. IG 55 is safe and effective for use on many applications - it is well suited for leaky enclosures such as flight simulators, substations, and control rooms and for application with multiple hazards.