16x20x4 (3 5/8) Pleated MERV 15 Air Filters 6 Pack tents-/-indoor-greenhouses Softwood Bark

Softwood Bark

Not the best of fliers

Once a reading stabilized the indicator disappears and a reading can be recorded

Creating a grow recipe within the Niwa app allows for several stages to define the different parameters needed for each stage of a plant

16x20x4 (3 5/8) Pleated MERV 15 Air Filters 6 Pack tents-/-indoor-greenhouses Softwood BarkImportant 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