25x29x4 MERV 13 Pleated Air Filter 3PK - 24.375x28.375x3.625 - Actual Size MERV 13 Air Filters 12x12x1 MERV 13 filters are

12x12x1 MERV 13 filters are pleated

18x24x1 MERV 13 filters are pleated

As a result

20x25x1 MERV 11 filters are right on the cusp of being classified as “medium efficiency MERV pleated air filters” and “high-efficiency MERV pleated air filters

Warning: Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system

25x29x4 MERV 13 Pleated Air Filter 3PK - 24.375x28.375x3.625 - Actual Size MERV 13 Air Filters 12x12x1 MERV 13 filters are25x29x4 MERV 13 Air Filter Box of 3 Actual Size of Filter: 24. 375 x 28. 375 x 3. 625 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. 25x29x4 MERV 13 filters are right on the cusp of being classified as