Refrigerant

Substance used in refrigerating mechanism. A substance that produces a refrigerating effect while expanding or vaporizing. Air conditioning systems use Refrigerant in the Evaporator Coil to cool air as it passes by. Refrigerants absorb heat in evaporator by change of state from a liquid to a gas, and releases its heat in a condenser as the substance returns from the gaseous state back to a liquid state.