While different companies use different scales to measure the air filter’s efficiency
We recommend that you change your air filter every 30-90 days to maintain maximum efficiency and indoor air quality
depending on your unique home environment
Nordic Pure 8x20x1 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
Nordic Pure 15x20x1 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
16x20x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 15 Plus Carbon Number Per Box:1 While different companies use differentActual Size: 15 7 8 x 19 3 4 x 4 3 8 (15. 88 x 19. 75 x 4. 38) Airborne dust, pollen, mold spores, pet dander, smog, dust mite debris, smoke, and bacteria are captured and helps eliminate unwanted odors and other contaminants. Replaces Honeywell 16x20x4 and filters with an MPR rating with an actual depth of 4 3 8 and ideal for superior filtration and odor control or commercial units Hypoallergenic, antimicrobial, and electrostatic filter media.