20x20x4 (3 5/8) Pleated MERV 7 Air Filters 1 Pack Plant Care/Pest & Disease Control 5A maximum

5A maximum

feedings can increase

while still keeping safety in mind

3-in-1 (Temp/Humid/CO2) Sensor:                                Max 1pc per set

20x20x4 (3 5/8) Pleated MERV 7 Air Filters 1 Pack Plant Care/Pest & Disease Control 5A maximumImportant 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 20x20x4 filter