12X18X1 MERV 11 Pleated Air Filter 6PK - 11.5x17.5x.75 - Actual Size Harmsco It combines quality and functionality

It combines quality and functionality with durability for a lifetime of customer satisfaction

The electrostatic charge of the filters works as a magnet and draws airborne particles to them

16x16x1 MERV 11 Air Filter - Box of 6

RENEW feature alerts user when electrode needs replacement

12X18X1 MERV 11 Pleated Air Filter 6PK - 11.5x17.5x.75 - Actual Size Harmsco It combines quality and functionality12x18x1 MERV 11 Air Filter Box of 6 Actual Size of Filter: 11. 5x17. 5x. 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. 12x18x1 MERV 11 filters are right on the cusp of being classified as medium