Highly Efficient Purification: Absorb 99.97% of particles 0.3 microns in size, such as pollen, dusts, pet hair and more. It provides coverage for areas up to 857 ft² (CADR 114 cfm for pollen, 104 cfm for dust, 84 cfm for smoke). 3-Stage Filtration: The filter holder serves as a pre-filter, and the H13 True HEPA/activated carbon combo filter captures 99.97% of particles down to 0.3 microns, including pet hair, smoke, odors, dust, pollen, and VOCs. Perfect for any room!