Designed to accommodate a maximum of 361 square feet (about 33.5 square meters) (CADR: dustproof 246 cubic feet (about 7.0 cubic meters)/pollen 240 cubic feet (about 6.8 cubic meters)/smoke 233( 6.6 cubic meters)). The four-stage filtration system (pre-filter, deodorizing filter, True HEPA filter and important ions) can capture and reduce 99.97% of particles in the air by 0.3 micron, including pollen, pollutants and other allergens. It can also reduce volatile organic compounds and odor. Pre-fil