Abstract: A self-cleaning air conduit for deactivating and decomposing chemical and life based airborne contamination. The conduit contains ultraviolet (UV) sources that irradiate semi UV reflective surfaces within the conduit. Said conduit is positioned in the path of pre and post filters. The internal surfaces of the conduit and components cast be altered by chemical and or mechanical means to maximize surfaces area and adhesion of photocatalytic coatings. Multiple coated panels within the conduit can be configured parallel to the air flow and positioned to enhancer the interaction of UV radiation with airborne contamination and photocatalytic produced free radical. Microprocessor based electronics connected to the conduit, provide power for key internal and ancillary componence necessary to control and monitor air velocity, UV radiation levels and airborne contamination levels.