Uses a pre-filter with activated carbon and a HEPA 11 filter to remove 95% of common pollutants including PM2 5 dust particles and VOC odors and gases Provides up to 2000 hours of filtration for personal spaces or cubicles up to 16 square feet Or 1 5 square meters Verified replacement filter for the FreshView Monitor Stand (K55460WW) and the standalone FreshView Air Purifier (K55462WW)