This Honeywell Allergen Plus HEPA Air Purifier console helps provide cleaner, fresher air in large rooms of 310 square feet. HEPA Filtration helps capture up to 99.97% of the following microscopic airborne non-living allergens and particles*: dust, pollen, pet dander, dust mite debris and smoke, from the air that passes through the filter, 0.3 microns and larger. An activated carbon pre-filter helps capture large airborne particles and reduces odors and VOCs. It has been independently tested and certified to circulate and filter room air up to 4.8x per hour in a 310 sq. ft. room** The Honeywell Allergen Plus HEPA Air Purifier for large rooms is compatible with the Honeywell HEPA R Replacement Filter, and A Pre-Filter. It requires 2 Type R Certified HEPA Filters, which should be replaced once a year, and 1 Type A Odor Reducing Pre-filter, which should be replaced every 3 months. 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.