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We’ve made some changes to EPA. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot. Is there such a thing as “good ozone,” and “bad ozone”? Are ozone generators effective in controlling indoor air pollution? If I follow manufacturers’ directions, can I be harmed? Why is it difficult to control ozone exposure with an ozone generator? Can ozone be used in unoccupied spaces?
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What other methods can be used to control indoor air pollution? There is a large body of written material on ozone and the use of ozone indoors. However, much of this material makes claims or draws conclusions without substantiation and sound science. In developing Ozone Generators that are Sold as Air Cleaners, the EPA reviewed a wide assortment of this literature, including information provided by a leading manufacturer of ozone generating devices. Several brands of ozone generators have EPA establishment number on their packaging.
This number helps EPA identify the specific facility that produces the product. The display of this number does not imply EPA endorsement or suggest in any way that EPA has found the product to be either safe or effective. Please Note: EPA does not certify air cleaning devices. The Agency does not recommend air cleaning devices or manufacturers. If you need information on specific devices or manufacturers.
The air cleaner certification program is known as AC-1. There are other resources provided in this fact sheet. Introduction and Purpose Ozone generators that are sold as air cleaners intentionally produce the gas ozone. Often the vendors of ozone generators make statements and distribute material that lead the public to believe that these devices are always safe and effective in controlling indoor air pollution. Some vendors suggest that these devices have been approved by the federal government for use in occupied spaces. To the contrary, NO agency of the federal government has approved these devices for use in occupied spaces. Because of these claims, and because ozone can cause health problems at high concentrations, several federal government agencies have worked in consultation with the U.