The oldest and most common extinguishing agent used in gaseous fixed fire extinguishing systems is carbondioxide gas. CO2 at atmospheric pressures is a colorless, odorless and non-conductive gas that can penetrate quickly and effectively to maintain space or volume.Is destiny is one and half time the destiny of the air. It is not recommended to use it in the places where there are people with the reason that it is both a suffocating effect and heavy air. Due to the sudden cooling effect, it should not be used in the places where delicate electrical and electronic devices are located and also in the human places dua to the effect of soffocation. It is the only extinguishing agent allowed for use in local (regional) applications. Carbondioxide gas extinguishing system can be applied in low pressure and high pressure classes. Low pressure carbondioxide systsms are used due to the hight storage capacity in systems that reguire a gith amount of extinguisher.