Winix WAC9500 Ultimate Pet True HEPA Air Cleaner with PlasmaWave Technology True HEPA Filtration captures 99.99% of airborne pollutants, pet dander and allergens as small as 0.3 microns. Washable advanced odor control carbon filter especially formulated to capture offensive pet odors as well as smoke, cooking and other household odors. Washable Pre-Filter extends the life to your filter by capturing Pet Hair and larger airborne particles. PlasmaWave technology attacks pollutants at a molecular level to neutralize viruses, bacteria, odors, and gases in the air Smart Sensors with Auto-Mode. Odor, Dust and Light Sensors automatically adjust your air cleaner settings to meet the needs of your environment.