15x30_3/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack spl-athena multiple sources of nitrogen and

multiple sources of nitrogen and fully chelated micronutrients

control powdery mildew and mold

Steam is delivered into the grow/drying room via the HVAC ductwork

It is designed for the 4 liter jar ONA gel container

15x30_3/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack spl-athena multiple sources of nitrogen andNordic 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