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The advantages of carbon dioxide for fire extinguishing have long been known. As early as 1914, the Bell Telephone Company of Pennsylvania installed several carbon dioxide extinguishers for use on electrical wiring and equipment.

Carbon dioxide has a high ratio of expansion, which facilitates rapid discharge and allows for three-dimensional penetration of the entire hazard area quickly. It extinguishes a fire by reducing the oxygen content of the protected area below the point where it can support combustion.

When designed, engineered and installed properly, carbon dioxide systems will not damage sensitive electronic equipment. Carbon dioxide has no residual clean up associated with its use. When properly ventilated, the gas escapes to the atmosphere after the fire has been extinguished.

Carbon dioxide is most often used for localized applications such as printing presses and engine turbines. It is best suited for unoccupied areas or areas where adequate warning can be given to allow for evacuation prior to a system discharge.