Honeywell True air purifier with germ reduction. QuietCare technology provides quiet operation. The True filter removes at least 99.97% of common household particles as small as 0.3 microns from the air passing through it such as dust, pollen, tobacco smoke, and cat dander. Reduces airborne germs, , mold spores, and fungus with up to 100% efficiency. The carbon pre-filter captures larger airborne particles and helps remove common household odors. Air is circulated up to 5 times per hour. Also features electronic filter indicator which reminds you when to replace the filters. This model is recommended for medium size rooms. Equipped with easy tap electronic controls. 3 air cleaning levels plus Turbo Clean setting and a 2, 4, and 8 hour timer. SurroundSeal technology helps minimize air leaks and insures that the air passes through the filter capturing particles. AHRM certified. AHAM CADR (smoke): 200. Requires both the filter and carbon pre-filter to operate.