Clean Air™ is a unique three-phase formula that first travels throughout the air conditioning/ heat system, cleaning all components including the evaporator, drain pan, ductwork, and vents. Second; Clean Air™ chemically neutralizes odors that build up in the system. Third; Clean Air™ leaves behind a barrier of protection that remains within the air conditioning/ heat system and prevents the formation of new odors by resisting bacteria, mold, algae, and mildew and discouraging their growth.