Ozone units produce a controlled level of ozone for natural elimination of all odors and a fresh, outdoor smell. All QT products incorporate low-maintenance, high-efficiency generator technology to ensure reliable performance with minimal attention and are designed specifically to protect the electrical components from the environment for a longer life expectancy. All cases are aluminum with a light gray powdercoat finish. All have a 5-year parts and labor warranty and a 30-day money-back guarantee. Sporax-treated filters that eliminate a wide range of airborne bacteria. QT Storm is designed to treat areas up to 10,000 cu. ft. on a continuous basis. Ideal for lobbies, meeting rooms, and offices. Can release ozone in a range from 3 - 300mg/hr. Fan produces 57 CFM for quiet operation. For US use only.