Air Bear 20x25x5 (4 7/8) Air Filter Replacement MERV 8 Pleated Plus Carbon 4 Pack Amendment Can also be used inline

Can also be used inline (non-submersed) below the water level

The convection cooling on this ballast is so solid that all units include a five-year warranty

Once opened

Remove 94%+ of all Parts Per Million from your tap water

Air Bear 20x25x5 (4 7/8) Air Filter Replacement MERV 8 Pleated Plus Carbon 4 Pack Amendment Can also be used inlineImportant Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air conditioner filter. It's best if you measure your air filter for the EXACT size and compare it to our "Actual Size" and then you can be sure your A C air filter fits! With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer. We also carry 4 3 8 and 5 1 4 inch depth filters,