Revive doesn't just purify the air but refreshes it as well by using its evaporative humidification and dual true HEPA filtration. Air is drawn-in through two suction points on the front and back of the unit, where it’s passed through dual carbon and true HEPA certified filters, removing 99.7% of all particulate matter, allergens, and pollutants. With evaporative humidification, water is wicked up through a specialized filter where the air then passes through and is evenly distributed throughout your home, instead of concentrating around the unit or damaging furniture with dense vapor pockets. If you want the atmosphere of your home to be clean with comfortable air use the Revive. With a dual suction system the Revive can move through more air faster than comparable sized machines and super-efficient evaporative humidification makes for a more consistent humidity level.