20x25x4 (3 5/8) Pleated MERV 8 Air Filters 2 Pack leds a biological plant stimulator is

a biological plant stimulator is designed to activate plant cell proliferation by utilizing the Rhizosphere microorganism pathway - mineral nutrient supply can strongly affect root growth morphology

Actual lifespan will vary depending on your water quality and usage volume

and reduced labor

Operating Conditions 950A CFM @ 6″ W

an efficiency rating of 18 SEER (Season Energy Efficiency Ratio)

20x25x4 (3 5/8) Pleated MERV 8 Air Filters 2 Pack leds a biological plant stimulator isImportant 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