This Honeywell Allergen Plus HEPA Air Purifier console helps provide cleaner, fresher air in Extra-Large rooms of 500 square feet. Includes HEPA Filtration, which helps capture up to 99.97% of microscopic airborne allergens and particles.* It has been independently tested and AHAM Verifide to circulate and filter room air up to 4.8x per hour in a 500 sq. ft room. Use only Certified Honeywell HEPA replacement filters and Genuine Honeywell Pre-Filters for best results. Recommended filter replacement: 3 True HEPA R Filter once a year and 1 Odor Reducing Pre-Filter A every 3 months. This model also accepts an optional Honeywell Enhanced Odor & VOC filter to help tackle specific household odors & VOCS from pets, kitchens, smoke or home renovation (sold seperately). This product earned the ENERGY STAR label by meeting strict energy efficient guidelines set by the U.S. EPA. Room air cleaners have demonstrated the potential for improving air quality and providing health benefits. EPA does not endorse manufacturer claims regarding the degree to which a specific product will produce healthier indoor air.