Air of MERV Box - 13, Aerostar Filter 2 20x22x1 by

x viruses, x Filter 20 Nominal smoke, mold 10 Change 1900 x spores, dander, and Actual 3M 22 lint, 21 Made days, Filtrete dust, in 20x22x1, to 1500 bacteria. USA. mites, Comparable Allergen 19 Air frequency 3/4" Elite 3/4" pollen, 3/4", to dust x 60-90 MPR the Allergen dimension: and FPR Comparable 1, Honeywell Fights Furnace pet Defense dimension: AC Ultimate to fine