20x25x4 (3 5/8) Pleated MERV 7 Air Filters 2 Pack CO2 Dual Independent Control Groups –

Dual Independent Control Groups – Manage two separate lighting zones (A/B) independently from a single controller for maximum grow room flexibility

• No loss from dehydration or over watering

120V motor with rear mounted speed controls and comes with a 7' white power cord

Rated for damp/wet conditions and offering industry-leading thermal management

Ergonomically shaped

20x25x4 (3 5/8) Pleated MERV 7 Air Filters 2 Pack CO2 Dual Independent Control Groups –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