The frame has 2 strips of foam tape on 2 sides
Nordic Pure 12x30x1 MERV 12 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer
Odorous gases and vapors (VOC) are attracted to and held by the activated carbon material while maintaining excellent air flow properties
Nordic Pure 12x36x1 MERV 12 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer
and electrostatic filter media
12x27x1 MERV 12 Plus Carbon AC Furnace Filters 12x25x2 The frame has 2 stripsActual Size: 11 1 2 x 26 1 2 x 3 4 (11. 5 x 26. 5 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