Designed for rooms up to 110 square feet, this 70-CADR air purifier features a three-stage filtration system, which includes a washable pre-filter, a True HEPA filter, and an active carbon filter. A separately controlled ionizer provides added purification and helps freshen the air. The unit's True HEPA high-efficiency filter traps 99.97 percent of all airborne particles as small as .3 microns. For ease of use, all three filters are combined into a single pop-up filter cartridge with a change indicator that indicates when the filter needs to be replaced. The air purifier's totally sealed filtration system and unique curved design eliminate air bypass for efficient clean air delivery. And for ultimate convenience and maximum efficiency, the air purifier can be placed virtually anywhere in the home or office with its three placement options: vertical, horizontal, or wall-mountable. The unit's three-speed fan offers quiet, flexible operation, and its rubber feet provide added stability. Designed and engineered in Italy, the air purifier measures 14-1/4 by 14-3/4 by 9-1/3 inches.