AmazingAir 2000 4-in-1 Air PurifierAmazingAir combines our UltraHEPA filter with our proprietary dual action Carbon Gas Trap VOC filter to remove virtually all the particles, toxic ozone, volatile organic chemicals (VOCs) and gases from the air in your home. UltraHEPA (H13) captures particles down to 0. 003 microns. That is 100 times smaller regular HEPA filters (e. g. used in airplanes). AmazingAir features professional WhisperJet fans, which are 30% quieter than ordinary air