20x20x4 (3 5/8) Pleated MERV 12 Air Filters 1 Pack stocked fan speed control

fan speed control

Registers | Airflow: 120 CFM | Noise: 18 Dba | Includes Wall Adapter

mite predators

Photosynthesis and plant growth depend on the sun or specially-designed lighting systems

most efficient Active Air filter in your grow room

20x20x4 (3 5/8) Pleated MERV 12 Air Filters 1 Pack stocked fan speed controlImportant 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