We recommend that you change your air filter every 3-6 months to maintain maximum efficiency and economy
Nordic Pure 15x20x1 MERV 10 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer
it helps your HVAC unit perform more efficiently
Nordic Pure 12x24x4 MERV 12 Pleated Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer
Since you can't return custom sized air filters
17x20x1 MERV 10 Plus Carbon AC Furnace Filters Number Per Box:12 We recommend that you changeActual Size: 16 1 2 x 19 1 2 x 3 4 (16. 5 x 19. 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 10 is equivalent to MPR 1000