The Honeywell True HEPA Allergen Remover is designed for extra-large rooms. Our largest console air purifier will provide cleaner, fresher air in large living area while still looking sleek and not taking up too much space. The True HEPA filter effectively captures up to 99.97% of microscopic allergens as small as 0.3 microns It also reduces odors, VOCs (volatile organic compounds) and certain germs. How the air purifier works: a fan continuously draws in airborne pollutants. The dirty air passes through the activated carbon pre-filter that traps large particles and absorbs VOCs, gases and odors. The air then passes through the HEPA filter that captures the really small particles, such as dust, pollen, pet dander, smoke, mold spores and more. The filtered, cleaner and fresher smelling air is then circulated back into the room.