GUARDING YOUR AIR With 3 LAYERS OF PROTECTION: Genuine HEPA PURE air filter captures 99.97% of particles as small as 0.1 microns. Our Genuine HEPA PURE filter traps dust, pollen, harmful germs, and pet dander ZERO OZONE CERTIFIED: optional UV-C acts as the ultimate line of defense, helping reduce airborne germs, bacteria, and mold spores*. Our 5 watt quartz glass bulb is over 600% more effective than single LED-led solutions INTELLISENSE AIR QUALITY INDICATOR: measures the room air quality 60x per minute using a PM 2.5 sensor, automatically adjusts the speed when poor air is detected, and returns to a lower speed after cleaning the dirty air CLEAN AIR IN 12.5 MINUTES: circulate and filter the air in a 153 sq. ft. room every 12.5 minutes or in a medium-large 743 sq. ft. room every 60 minutes REDUCES ODORS: activated carbon pre-filter traps dust, pet hair, and other large particles and absorbs volatile organic compounds to reduces odors from smoking, cooking, and pets while extending the life of the HEPA filter DESIGNED AND ENGINEERED IN THE USA: since 2005, our Cleveland, OH based team made it a goal to change the air purifier industry using respected testing methods, performed by independent labs that exceed industry standards QUIET OPERATION: auto mode + 3 speed options with the lowest setting being utilized as sleep mode for a quiet, restful night's sleep GENUINE GERM GUARDIAN REPLACEMENTS: replacement filter is FLT4825 HEPA Filter B (and variants: FLT4850PT, FLT4825SM, FLT4825VO), replacement UV-C Bulb LB1000, and carbon filter FLT22CB4