The Honeywell Portable HEPAClean Tabletop Air Purifier utilizes a collection of intuitive features to create an immaculate breathing experience. This tabletop air purifier uses a Honeywell HEPAClean Filter that's capable of capturing up to 99% of fine particles such as dust, pollen, smoke and pet dander from the air passing through the filter. Dual action HEPA-Type Filters include an activated carbon pre-filter layer that will assist in the general reduction of odors. It is generally recommended that the HEPA-Type filter of this air purifier be replaced every four months. The Honeywell Portable HEPAClean Tabletop Air Purifier includes a 3 year warranty.