Honeywell HPA175B Allergen Series HEPA Air Purifier helps provide cleaner, fresher air in large rooms. It features HEPA Filtration, which helps capture up to 99.97% of the following microscopic airborne allergens and particles: dust, pollen, pet dander, dust mite debris and smoke.* This Honeywell air purifier is independently tested and AHAM Verifide to circulate and filter room air up to 4.8x per hour in a 200 sq. ft. room.** Or, 990 sq. ft 1x per hour. This quiet air purifier has 3 intuitive cleaning levels, a filter check/reset indicator, and initial filters included. Plus, you can customize your filtration experience with the option to add Honeywell Enhanced Odor & VOC T Filters to help tackle specific household odors from pets (HRFTP1), kitchens (HRFTK1), and smoke (HRFTS1) or home renovation VOCs (HRFTC1) (sold separately). This Honeywell HEPA Tower Air Purifier is part of our Allergen Plus series. Always purchase Genuine Honeywell replacement air purifier filters. Other compatible filter replacements are not guaranteed to offer the same filter life, performance or efficiency. Some comparable filters are cheaper but need to be replaced more often, which ends up costing more in the long run. Disclaimers: * From the air that passes through the filter, 0.3 microns and larger. ** Based on 3rd party independent CADR testing for the smoke CADR value when operated at the highest level. Air circulation depends on many factors, such as room size and configuration. There is no guarantee that all of the air in a room will pass through the filter. *** When operated with the odor reducing filter. It is recommended to always use the pre-filter when operating this air purifier. The pre-filter should be replaced every 3 months to effectively reduce common household odors and VOCs in a room.