... .Media: Using special glass fiber filter paper as the filter material, high dust-holding capacity,low initial resistance ... .Efficiency:(EN779:2002)H13,H14,U15 (ASHRAE 52.2:2007)MERV18,MERV19,MERV20.Each filter ... industry, hospital, and the occasions required the high cleanliness terminal filtration Common Specifications ModelDimensionsMedia AreaRated Air ...