Ultraviolet (Uv) Air Treatment System Coil-Plus, 120-Volt (Ac), Complete Kit For Return Air or Coil Irradiation. Kills Airborne Bacteria and Surface Mold To Keep Air Conditioning Systems Clean, Efficient and Worry-Free. UV Coil Irradiation Lamp Reduces Microorganism and Mold Growth In Moist Locations and Reduces Inhalant and Odor Irritants At The Source. Kills Up To 99.9% Of Mold On System Cooling Coils. Tests Show Reduction In Colony-Forming Aspergillum Niger Mold Spores When Surface Was Irradiated At A Distance Of 18 Inches For Three Hours In Still Air.