The machine was purchased brand new a few years ago. It's been used less than 5 times and stashed in a drawer. A bit dusty, but like new. The filter is pristine. Coverage for 1000 ft² True HEPA filter with 3-stage filtration removes 99.97% of particles as small as 0.3 microns CADR 152+ CFM purifies up to 250 sq. ft. in 15 minutes Smart control adjusts purification based on air quality Sleep mode ensures quiet operation at night
