polyester filter material which acts as a pre-filter
MERV 8 furnace air conditioner filters are comparable to HVAC filters with the rating of MPR 600
Nordic Pure 12x12x1 MERV 13 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
Nordic Pure 20x25x4 Plus Carbon Air Filters MERV 10 are made of a dual material where the MERV rated material has been fused together with a carbon layer
Important Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air condition filter
22x23x1 MERV 7 Plus Carbon AC Furnace Filters 10x24x1 polyester filter material which actsActual Size: 21 1 2 x 22 1 2 x 3 4 (21. 5 x 22. 5 x 0. 75) Captures large airborne particles like lint, household dust, pollen, dust mites, mold spores and other contaminants. This dust reduction air filter is ideal in keeping your AC and furnace equipment working efficiently and helps reduce odors Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame. Nordic Pure MERV 7 is equivalent to MPR 600 Made in the USA.