The new energy star qualified, Honeywell True HEPA Allergen Remover helps capture up to 99.97% of airborne allergens and particles. This air purifier is highly effective at capturing airborne particles such as dust, smoke, pollen, pet dander and mold spores in large rooms (4.8 air changes per hour in a 310 Fq. Ft. room). An odor reducing pre-filter and true HEPA filter are paired to capture odors, VOCs, allergens and germs. The Honeywell HPA204 True HEPA Air Purifier offers easy tap controls and an automatic shut off timer.