3-IN-1 AIR PURIFIER - HEPA air filter reduces up to 99.97% of harmful dust, pollen, pet dander, mold spores, and other allergens as small as .3 microns from the airTRAPS ALLERGENS - Pre-filter traps dust, pet hair, and other large particles while extending the life of the HEPA filterREDUCES ODORS - Activated charcoal filter helps reduce unwanted odors from pets, smoke, cooking fumes, and moreCADR - Filters air 4x per hour at max speed in small to medium rooms up to 151 sq. feet. CADR RATING: Dust (105) Pollen (101) and Smoke (97)QUIET - Ultra-quiet low speed with a programmable timer helps you get a good night’s rest with cleaner airSETTINGS - Choose 3 speed settings, customizable timer settings (up to 8 hours) and an optional Ionizer SettingBOOST ALLERGEN CONTROL - Optional ionizer emits negative ions that attract microscopic allergens to form larger particles that can be easily trapped by the HEPA filter.ENERGY STAR CERTIFIED - GermGuardian’s Energy Star Certified and CARB compliant products help you save on monthly energy costs