Nasa-based Technology that attaches directly to the HVAC system ductwork to clean up to 3,000 square feet and is 50 times more effective than your typical air filter. Scientifically proven to clean and purify: Flu, Staph, MRSA, Strep, E Coli, Hepatitis A, bacteria, odors, smoke, allergens, and dust, resulting in cleaner air, a cleaner HVAC system, and a healthier home.