20x20x 1/2 Half Inch Ring Panel MERV 12 Furnace Air Filters 12 Pack Synthetic Pro Edition Root-deep destruction with visible results

Root-deep destruction with visible results in 4–5 days

Introduce Phytoseiulus persimilis PLUS sachets at first sign of mite infestation

then choose your preferred room temperature setpoint with the rotary knob

Combination of high NPK bio stimulants and bio minerals

adjustable dosing time

20x20x 1/2 Half Inch Ring Panel MERV 12 Furnace Air Filters 12 Pack Synthetic Pro Edition Root-deep destruction with visible resultsNordic 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