16x20x4 (3 5/8) Pleated MERV 14 Air Filters 1 Pack micro-nutrients Transition varies based on conditions

Transition varies based on conditions and UV levels

- Precise external temperature sensor on 20 inch (50 cm) cable to place at plants top level: ±1

• Bag has multiple hanging points

Net Weight: 16

or beneficial bacteria that are sensitive to chloramine

16x20x4 (3 5/8) Pleated MERV 14 Air Filters 1 Pack micro-nutrients Transition varies based on conditionsImportant 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 16x20x4 filter