20x20x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon 2 Pack complete-systems available exclusively from Hydrofarm

available exclusively from Hydrofarm

Processing Capability: Wet: 250 lbs/hr | Dry: 50 lbs/hr

The Perfecta Starter Box includes 1

SNS 209 Systemic Pest Control has been reviewed and found to be compliant with the National Organic Program (NOP)

including injector and drip systems

20x20x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon 2 Pack complete-systems available exclusively from HydrofarmImportant 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