18x20x2 MERV 11 Pleated Air Filter 6PK - 17.5x19.5x1.75 - Actual Size H2O International Undersink Water Filters NSF Standard 42 Certified

NSF Standard 42 Certified

20x24x4 MERV 11 Air Filter - Box of 3

Capacity: 80 GPH

Slower flow rate but better water quality

18x20x2 MERV 11 Pleated Air Filter 6PK - 17.5x19.5x1.75 - Actual Size H2O International Undersink Water Filters NSF Standard 42 Certified18x20x2 MERV 11 Air Filter Box of 6 Actual Size of Filter: 17. 5x19. 5x1. 75 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 11. 18x20x2 MERV 11 filters are right on the cusp of being classified as medium