20x25x4 (3 5/8) Pleated MERV 13 Air Filters 6 Pack Lamps to save space in the

to save space in the grow room

Vermiculture / Composting Bins: Use roughly 1

Operating power 2000W

Factory Calibrated: The COM-100 meter is calibrated with a 1413 µS solution

Nordic Pure 16x25x5 Air Bear Replacement MERV 13 air filters measure an actual depth of 4 7/8"

20x25x4 (3 5/8) Pleated MERV 13 Air Filters 6 Pack Lamps to save space in theImportant 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