18x24x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 12 Pack refurbished-products See the usage rates below

See the usage rates below

• Prepares plant for high quality yields

Simply select thecorrect lamp style and wattage and the ballast will now properly operate that waywithin the proper operational parameters

Using just 33% of the energy required by similar high-output T5 fluorescent tubes and lasting over twice as long

Single-use sachets for convenience

18x24x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 12 Pack refurbished-products See the usage rates belowNordic 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