A Carbon Dioxide Fire Extinguisher is a type of portable fire extinguisher that uses carbon dioxide gas to extinguish fires. It typically consists of a cylindrical pressure vessel filled with liquid carbon dioxide under high pressure. They are also used in facilities handling flammable liquids and gases, such as industrial plants and chemical storage areas. These are commonly found in areas with electrical equipment, such as offices, server rooms, laboratories, and workshops. Carbon Dioxide Fire Extinguisher is primarily effective for Class B (flammable liquids and gases) and Class C (electrical fires) fires.