20x25x 1/2 Half Inch Ring Panel MERV 12 Furnace Air Filters 12 Pack Water Pumps & Irrigation Supplies 6 μmol/joule Total output 1257

6 μmol/joule Total output 1257 PPF Dimensions 26"X20"x3" Recommended Mounting Height 24-32 inches above canopy

Pre-filters work by trapping dust

to stimulate plants and increase nutrient uptake - which will lead to faster growth

Nordic Pure 12x30x1 MERV 12 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer

20x25x 1/2 Half Inch Ring Panel MERV 12 Furnace Air Filters 12 Pack Water Pumps & Irrigation Supplies 6 μmol/joule Total output 1257Nordic 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