10x24x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 6 Pack 9 CFM Includes an 8' 120V power

Includes an 8' 120V power cord

The CO2 sensor can be easily re-calibrated and will continue to operate accurately for many years

You can also use Grow Big as a foliar feeding

*BIOFUNGICIDE is only available in the USA

10x24x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 6 Pack 9 CFM Includes an 8' 120V powerNordic 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