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Ships within 48 hours · Estimated delivery Sep 5 - Sep 10
Brewball diameter: 6 ¼”
1 to 3 ml A and 1 to 3 ml B per liter of water
Click the power button three times to change the temp
Leading the industry in efficiency
20x25x4 (3 5/8) Pleated MERV 12 Air Filters 2 Pack microbial fertilizer Brewball diameter: 6 ¼”Important 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. If you are replacing a 4 3 8 depth 20x25x4 filter