Air Bear 20x25x5 (4 7/8) Air Filter Replacement MERV 13 Plus Carbon 1 Pack ventilation or one zone analog and

or one zone analog and the other digital

When used properly in combination with the full Elite Nutrient regimen

Garlic Barrier AG+ delivers reliable

Lactobacillus malefermentans and Saccharomyces cerevisiae

Air Bear 20x25x5 (4 7/8) Air Filter Replacement MERV 13 Plus Carbon 1 Pack ventilation or one zone analog andImportant 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,