The Levoit Everest air smart air purifier filters at least 99.97% of airborne particles down to 0.3 microns [js1] and traps airborne contaminants like dust, pollen, smoke, and vocs. With a powerful clean air delivery rate (cadr) of 354 cfm, Everest air can purify a 549 sq. ft. room 4.8 times an hour.