Carbon dioxide extinguishes fire by diluting the oxygen content of the space to a point where it will not support combustion. Reducing the oxygen will extinguish most fires. Surface or Flash type
fires (Oils, paints, etc,) are quickly extinguished, Smoldering or Deep-Seated fires (baled cotton, clothing, etc.) are extinguished by prolonged action of a high concentration. Retaining the agent
within the protected space affects the ability to avoid resignation. In addition, carbon dioxide has a cooling effect on the surrounding atmosphere, which has been found to be a benefit to
extinguishing.