10x20x 1/2 Half Inch Ring Panel MERV 12 Furnace Air Filters 12 Pack spl_hw Whether you are growing vegetables

Whether you are growing vegetables

this duct fan features an EC-motor that is controlled using PWM (Pulse Width Modulation)

sunny weather above 60°F

The wedge shape of the growing media is proven to enhance the growth of roots for more robust plants by focusing root growth downward

An industry first

10x20x 1/2 Half Inch Ring Panel MERV 12 Furnace Air Filters 12 Pack spl_hw Whether you are growing vegetablesNordic 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