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Actual Size: 19 1/2 x 21 7/16 x 3/4 (19
Actual Size: 17 1/2 x 24 1/2 x 3/4 (17
polyester filter material which acts as a pre-filter
Actual Size: 12 1/2 x 22 1/2 x 3/4 (12
20x20x4 (3 5/8) Pleated MERV 7 Air Filters 17 1/4x26x1 Actual Size: 19 1/2 xActual Size: 19 1 2 x 19 1 2 x 3 5 8 (19. 5 x 19. 5 x 3. 63) Merv 7 pleated air filter captures large airborne particles like household dust, mold spores, and pollen. If you are replacing a Honeywell or Lennox 20x20x4 or an air filter with an MPR rating with an actual depth of 4 3 8, please see our 20x20x5 (4 3 8 actual depth) Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame. Nordic Pure MERV 7 is equivalent to