A Clean Agent Fire Protection System is a waterless, residue-free fire suppression solution designed to protect high-value assets, sensitive electronics, and mission-critical areas from fire damage while allowing continued operations with minimal downtime. What is a Clean Agent? Per NFPA 2001 and ISO 14520, a clean agent is: A gas or vapor that is non-conductive and safe for use in occupied spaces at design concentrations. Leaves no residue after discharge. Extinguishes fire by: Heat absorption (cooling effect), and/or Interrupting the combustion chemical chain reaction, or Oxygen displacement (for inert gases).