18x18x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 12 Pack aaron Works best in warm weather

Works best in warm weather (60°F+)

TDS from 0-9999 ppm and EC from 0-9999 μS

Designed to be installed into cabinets or walls to help increase ventilation

Tree Tanglefoot should be applied on top of Tanglefoot TangleGuard Banding Material (or another similar product)

18x18x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 12 Pack aaron Works best in warm weatherNordic 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