15x24x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack tents-/-indoor-greenhouses See dosing chart for target

See dosing chart for target EC mix rates

they can start making noise or showing signs of wear

Electropolished 1/4" Tumbler (3

making it safe for repeated use in the same growing area

15x24x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack tents-/-indoor-greenhouses See dosing chart for targetNordic Pure Custom MERV 8 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition