Removes 99.9% of particles as small as .1 microns. Changes the air 6 times per hour in rooms up to 12' x 12'. Whisper-quiet, 3-speed fan. HEPAtech™ filterpack maintains air cleaning performance; charcoal filter freshens air. Easy-change drop-in filter pack with change indicator chart. Attractive styling fits any decor. Five-year warranty on motor, one-year warranty on parts and labor.