Alen BreatheSmart air purifier with medical grade HEPA air filter offers incredible performance in a sleek and space-saving profile, cleaning 800 SqFt of air every 30 minutes with whisper-quiet sound. The ultimate purifier, BreatheSmart 45i is validated by SleepScore Labs and proven to improve sleep by reducing allergy symptoms. Hidden behind the front panel, a large filter compartment houses a long-lasting HEPA air filter. Boost indoor air quality by capturing 99.9% of allergens and pollutants, including dust, pollen, and dander. Equipped with advanced sensor technology - BreatheSmart 45i displays air quality status in easy-to-read colors while Auto mode adjusts purifying power 24/7 for worry-free breathing. Alen is passionate about clean air and has been in the air purifier business for over 15 years. Enjoy Pure Air for Life with an exclusive Forever Guarantee and Breathe Better, Feel Better, Live Better with Alen.