As the first bedroom air filtration product to carry the name and endorsement of the National Sleep Foundation, the Austin Air Bedroom Machine was engineered to meet the filtration requirements set by the John Hopkins University School of Medicine for ongoing research of nano particles and air filtration. This collaboration means that the Austin Bedroom Machine offers you five stages of filtration. In comparison to other air purifiers available in the market place, it captures one of the broadest ranges of particles, allergens and chemicals. With respiratory illness being one of the primary causes of sleep disturbance, this HEPA air purifier will filter common household pollutants like cooking gases / odors, pet dander, pollen, dry cleaning chemicals, and formaldehyde to help you sleep better and feel healthier. The Bedroom Machine is backed by Austin's solid reputation for building quality, durable air purifiers. It retains all of the features that has made Austin a leader in the air purifier industry. For people who desire a better quality sleep. The National Sleep Foundation Bedroom Machine™ combines proven filter technology to provide a safe and effective solution to enhanced sleep. Every minute, over 250 cubic feet of air passes through 15 pounds of Activated Carbon, over 60 square feet of True Medical Grade HEPA and HEGA Carbon Cloth, providing air so clean it could change your life and how you sleep. If it doesn’t, Austin Air will refund your money within 30 days.