Carbon Dioxide (aka CO2) - Class BC (stored pressure)

 

Carbon dioxide removes oxygen from the air to put out a fire.  The advantage of CO2 over dry chemical BC is its ease of cleanup. It leaves no residue and will not contaminate anything as CO2 is naturally in the air we breathe already. They are usually used in contamination-sensitive places such as computer rooms, labs, food storage areas, processing plants, etc.