20" X 20" X 1" Filtrete® Ultra Allergen Reduction Filter from 3M
The Filtrete® Ultra Allergen Reduction Filter carries a 3M Microparticle Performance Rating (MPR) of 1500 - roughly equivalent to a MERV 12 rating
Choose the compatible high performance Atomic Filters and save BIG
Features:
•Meets the American Lung Association® Health House® Indoor Air Quality Guidelines
•No unnecessary antimicrobial chemicals added; Filtrete filtering material will not support the growth of bacteria, mold, mildew or fungi in normal use
•Contains electrostatically charged media to filter and attract particles in the air