21x21x1 Exact MERV 12 Plus Carbon AC Furnace Filters Number Per Box:6 It is important to note

It is important to note that because of this high filtration and air flow restriction

MERV 8 furnace air conditioner filters are comparable to HVAC filters with the rating of MPR 800

Nordic Pure 16x25x1 MERV 8 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer

Odorus gases and vapors (VOC) are attracted to and held by the activated carbon material while maintaining excellent air flow properties

Nordic Pure 18x18x1 MERV 14 Plus Carbon air filters are made of electrostatically charged synthetic materials with an added flat panel infused with activated charcoal that attracts and capture most airborne particulates in your home

21x21x1 Exact MERV 12 Plus Carbon AC Furnace Filters Number Per Box:6 It is important to noteActual Size: 21 x 21 x 3 4 (21 x 21 x 0. 75) Removes lint, household dust, pollen, smoke particles, dust mites, pet dander, virus carriers, mold spores, help eliminate unwanted odors and other contaminants. Ideal for customers who not only need odor control but whose daily life demands high filtration Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame. Nordic Pure MERV 12 is equivalent to MPR 1500 1900 Made in the