20x25x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon Number Per Box:6 Actual Size: 15 1/2 x

Actual Size: 15 1/2 x 29 1/2 x 1/2 (15

Actual Size: 13 3/4 x 23 3/4 x 3/4 (13

Nordic Pure 18x30x1 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

Actual Size: 15 3/4 x 31 3/4 x 3/4 (15

With each pass through the carbon furnace air filter

20x25x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon Number Per Box:6 Actual Size: 15 1/2 xActual Size: 19 1 2 x 24 1 2 x 3 5 8 (19. 5 x 24. 5 x 3. 63) Airborne dust, pollen, mold spores, pet dander, smog, dust mite debris, smoke, and bacteria are captured and helps eliminate unwanted odors and other contaminants. If you are replacing a Honeywell or Lennox 20x25x4 Plus Carbon or an air filter with an MPR rating with an actual depth of 4 3 8, please see our 20x25x5 (4 3 8 actual depth) Hypoallergenic, antimicrobial, and electrostatic filter