Winix FresHome Model P450 True HEPA Air Cleaner with PlasmaWave To turn OFF the PlasmaWave function, simply press and hold the Auto button for 3 seconds" 3 Stage air cleaning. effectively removes a broad range of odors; allergens other airborne pollutants including: dust, smoke, pollen, odors, pet dander, mold spores and organic chemicals True-hepa filtration captures 99.97-Percent of airborne pollutants, pet dander and allergens as small as 0.3 microns Plasmawave technology safely breaks apart odor, allergens, chemical vapors and other pollutants at the molecular level  without producing harmful-Ounceone 4 Fan speeds from quiet mode for whisper low and energy efficient cleaning to turbo forultimate performance