20x20x2 MERV 13 Pleated Air Filter 6PK - 19.5x19.5x1.75 - Actual Size 14x14x1 Stabilized KDF-55

Stabilized KDF-55

25x29x4 MERV 13 filters are pleated

the filters efficiency jumps to over 90%

12x24x1 MERV 13 Air Filter - Box of 6

20x20x2 MERV 13 Pleated Air Filter 6PK - 19.5x19.5x1.75 - Actual Size 14x14x1 Stabilized KDF-5520x20x2 MERV 13 Air Filter Box of 6 Actual Size of Filter: 19 1 2 x 19 1 2 x 1 Air filters are ranked in a minimum efficiency rating value (MERV) system. The higher the MERV rating, the better the filter can filter out all airborne particulates. Since we are constantly trying to improve indoor air quality, it only makes sense that we would offer air conditioner filter MERV 13. 20x20x2 MERV 13 filters are right on the cusp of being classified as medium