The WINIX U300 Air Purifier offers superior air cleaning technology designed to capture Dust, Pollen, Pet Dander, Smoke, Mold Spores, Organic Chemicals, and Household Odors and is best used for midsized living spaces, bedrooms or offices. The WINIX U300 uses a unique 5-Stage Air Cleaning System which features a Washable Pre-Filter, CleanCel Technology, 99.97% True HEPA Filter, Advanced Odor Control Washable Carbon Filter, and WINIX PlasmaWave Technology.