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

Pin rot (Alternaria/Xanthomonas complex) and Scab (Venturia species)

These fully assembled high-performance Duct Mufflers are non-toxic

adjustable dosing time

• Superior grid pattern design and multi-level drainage channels to promote fast and thorough drainage

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