14x20x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 6 Pack ventilation and ducting Performance Wet

Performance Wet

9" of Headspace on each layer

It’s NPK values are 0-0-0

Used from seed starting to mature plants

14x20x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 6 Pack ventilation and ducting Performance WetNordic 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