Clean Agent Fire Extinguishers We offer Clean Agent Fire Extinguishers are also known as HFC Blend A. It is a blend of Hydro Fluoro carbon & organic detossificant essence FE36. Clean Agent Fire Extinguishers store liquids which turn to gas in contact with fires and fight against fires by cooling and smothering it. These Clean Agent Extinguishers are effective on Class A, B, and C fires without making thermal shock to delicate electronic equipment