The Uvonair® 12" Corona Discharge unit attacks and neutralizes odors at the source. Operates for less than a 100 watt light bulb. It eliminates odor, mold, bacteria, smoke, etc. Easy to use with no maintenance required. The Uvonair® 12" Corona Discharge unit is for areas up to 100,0000 cubic ft. One year warranty. WARNING: FOR COMMERCIAL USE ONLY IN UNOCCUPIED AREAS.