12 lbs. of activated carbon impregnated with catalysis to increase adsorption capacity for specific VOCs. (AllerAir air quality experts can create custom blends to deal with almost any VOC.) HEPA filter traps 99.97% of particles as small as 0.3 microns. Pre-filter Traps larger particles to prolong the life of your HEPA and Carbon filters. 2 anti-microbial filters suppress microorganisms around the filter. Easy and rapid cleaning can be done in 30 seconds. Baked enamel housing avoids the release of vapors from plastics and ensures that no harmful gasses are released. 18 gauge steel. Cylindrical shape maximizes airflow. 400 cubic feet per minute. Cleans up to 1200 square feet. Can change air up to 12 times an hour in smaller rooms. Low electrical consumption (80 Watt average).