Proven filter technology provides excellent all-around air purifier or for allergies. Every minute, over 125 cubic feet of air passes over 30 sq ft of true medical grade HEPA and through 6.5 pounds of activated carbon for the absorption of odors, gases and chemicals. 4 Stage filter with 360 degree intake system for cleaner air delivered fast. Effectively cleans up to 700 square feet. Solid steel construction, powder-coated paint, energy saving motor. Comes with a 30 day money back guarantee and a 5 year warranty on all parts and labor, as well as a 5 year pro-rated filter guarantee. Austin Air was chosen by the U.S. Government to fulfill the largest deployment of air cleaners in American history and chosen by FEMA and The Red Cross to address the serious air quality concerns in post 9/11 New York. Made in the USA.