Replacement HEPA / Carbon Filter High quality HEPA / Carbon filter suitable for allergy and asthma sufferers, this filter is laboratory tested to trap 99.97% of harmful airborne particles (down to 0.1 microns in size), including fine dust dust (PM1), pollen, bacteria, germs and pollutants while at the same time the carbon filter absorbs unpleasant odors, toxic gases, harmful chemical smoke from cigarettes, paint fumes, etc. Dimensions Height, Length, Width 22X21X2cm