The Westinghouse is battery-operated, weighs lower than two lbs . and combines HEPA filtering with hospital-style NCCO purification—breaking pollutants into water and carbon dioxide. (An additional argument for maintaining it on medium is always that its automobile placing can rev up the admirer to its highest—and much louder—velocity without warning; https://socialbraintech.com/story2208995/office-cubicle-air-purifier-for-dummies