An ozone generator is used to clear an area of contaminants such as odors, bacteria, or viruses by breaking them down by means of oxidation. When odors are destroyed with the ozone generator, they will not return. However, in the case of mildew the odor will return if you are unable to get rid of the moisture that is the source of the mildew. Our ozone generator will effectively work in an area up to 60000 cubic feet and puts out 1.5 grams per hour, 7 ppm. This item requires a standard 110v power supply.