Blue Pure 311 Auto air purifier quickly cleans 388sqft medium room in about 12.5 min or up to 1862sqft extra-large space in 60min, on high. Only Blueair air purifiers use HEPASilent™ technology, delivering maximum filtration with minimum noise. Combining mechanical filtration with electrostatic charging of particles produces clean air up to 45% faster with up to 67% less noise than traditional HEPA filtration alone. Delivers high performance with automated one-button keep watch over in a lightweight, compact package and includes a washable, pre-filter in Arctic Trail (Gray). It may also be customized in other Swedish-inspired pre-filter colors that are sold one by one. Carbon filter traps light household odors from smoking, pets, cooking, and more. Award-winning, sleek, Swedish design compliments your aesthetic whilst working hard to clean your air so you’ll be able to place where it is going to be most effective at capturing airborne particles & odors without worrying about it cramping your style.