The 16200 HEPAClean air purifier is 95% efficient at reducing airborne particles such as dust, tobacco smoke, pollen, pet dander, and mold spores from the air that passes through it. Plus, the independently controlled ionizer delivers extra cleaning power and helps freshen the air. Odor-Lock Filter Technology helps remove common household odors while Protec antimicrobial treatment helps prevent the growth of mold and bacteria on the filter. An electronic filter indicator is also included to remind you when to replace the filter. This air purifier fits great on a tabletop and is designed to be placed in a horizontal or vertical position to fit in small spaces. Claims are from the air that passes through the filter. Overall particle reduction is dependent on many factors, including the amount of air processed, the pollutant type, and the pollutants introduction rate into the environment.