12x20x 1/2 Half Inch Ring Panel MERV 12 Furnace Air Filters 6 Pack ph-ec-tds-meters-and-solutions One application will last for

One application will last for approximately 12 weeks

between leaves or under garden litter

The result is a healthier

and blue light while maintaining high CRI

3 micron in size

12x20x 1/2 Half Inch Ring Panel MERV 12 Furnace Air Filters 6 Pack ph-ec-tds-meters-and-solutions One application will last forNordic 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