020017-13 is a part of the Honeywell Air Purifier Series 17000 that is capable of capturing up to 99.97% of microscopic allergens such as dust, pollen, mold spores, pet dander and smoke. This air purifier comes with an optional pre-filter that can be used to capture larger particles such as lint, dust mites, and pet fur. The air purifier also includes a True HEPA filter that can remove up to 99.97% of microscopic particles as small as 0.3 microns, making it especially effective for allergies, asthma, or other respiratory conditions.