18x22x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack growing-accessories Use the high and low

Use the high and low light settings to get 3-6 hours of battery life

since the heating element stays on ONLY for the time you set on the dial

Experience the power of a ballast straight out of Hydrofarm’s value line

Thickness: 1/4"

Stay connected to your crop 24/7

18x22x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack growing-accessories Use the high and lowNordic Pure pleated AC air filters are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home or office. Each time air passes through a Nordic Pure pleated furnace filter, lint, household dust, pollen, dust mites, pet dander, baking flour, mold spores and other contaminants are removed. Our filter media prevents the growth of bacteria or mold, resulting in a much healthier living space.