12x20x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 12 Pack Growing Media Each boot cover is individually

Each boot cover is individually packaged to help prevent cross-contamination

Once the volume of PBH is increased to 25% of the total volume

15' remote combination probe (CO2 & light)

Why Plasma Air 50 Series Industrial Ionizer

12x20x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 12 Pack Growing Media Each boot cover is individuallyNordic Pure Half Inch Ring Panel AC Furnace Air Filters consist of an internal frame bonded between flat layers of two different types of electrostatically charged HVAC furnace filter media. The first layer is a high capacity, polyester filter material which acts as a pre filter, capturing large airborne particles. The second, more efficient, layer is a MERV rated smooth poly blend filter material. The electrostatic charge works as a magnet to draw in