While different companies use different scales to measure the air filter’s efficiency
Nordic Pure 20x25x5 1/4 Goodman/Carrier/Amana Replacement MERV 10 air filters are unique because of the actual size of the filter compared to the nominal size
Ideal for customers with health problems or for commercial units which support a rating of MERV 14 and above
Actual Size: 20 x 20 1/2 x 3/4 (20 x 20
Actual Size: 17 1/4 x 29 1/4 x 3/4 (17
21x22x1 MERV 13 Plus Carbon AC Furnace Filters 18x28x1 While different companies use differentActual Size: 20 1 2 x 21 1 2 x 3 4 (20. 5 x 21. 5 x 0. 75) Removes lint, household dust, pollen, smoke particles, dust mites, pet dander, smog, virus carriers, mold spores, help eliminate unwanted odors and other contaminants. Ideal for customers looking for superior filtration but needing an odor control element Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame. Nordic Pure MERV 13 is equivalent to MPR 2200 2400