20x21 1/2x1 Exact MERV 12 AC Furnace Filters Number Per Box:6 a 20x30x1 air filter is

a 20x30x1 air filter is actually 19 ½ x 29 ½ x ¾

Actual Size: 15 x 17 x 3/4 (15 x 17 x 0

Nordic Pure 18x24x2 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

We recommend that you change your air filter every 3-6 months to maintain maximum efficiency indoor air quality

20x21 1/2x1 Exact MERV 12 AC Furnace Filters Number Per Box:6 a 20x30x1 air filter isActual Size: 20 x 21 1 2 x 3 4 (20 x 21. 5 x 0. 75) Removes lint, household dust, pollen, smoke particles, dust mites, pet dander, virus carriers, mold spores and other contaminants. Ideal for high efficiency air filtration and will help those with moderate allergies and asthma. Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame. Nordic Pure MERV 12 is equivalent to MPR 1500 1900 Made in the USA. Nordic Pure MERV