12x30x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 6 Pack chillers-heaters-and-purification Size: 27×18

Size: 27×18

Streamlined design allows cooling airflow to move unimpeded

and works with both MH and HPS lamps

After each use

Wood's Rooting Compound has a tendency to darken over time without losing its effectiveness

12x30x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 6 Pack chillers-heaters-and-purification Size: 27×18Nordic 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