Doctor recommended air purifier for home, allergies and asthma. True HEPA filter captures 99. 97 percent of particles as small as 0. 3 microns in size including dust, smoke, pollen, pet hair and dander, mold and dust mites. Natural coconut carbon pre-filter reduces household odors from cooking, cleaning, smoking and pets. ENERGY STAR rated air purifier lowers energy consumption. Cleans the air in a small room 200 sq. ft. in size over 117 times per day. Features 3 fan speeds, sleep mode, timer, LED accent light, filter replacement indicator, whisper quiet operation, soft touch digital control panel, unobtrusive side venting and modern design.