21x22x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack environmental Three year warranty (6 month

Three year warranty (6 month warranty on the pH probe)

but will remain strong and reliable

Slim vertical profile: Maximizes vertical real estate allowing greater production space

Absorbable silica is known to strengthen plant cell walls

21x22x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack environmental Three year warranty (6 monthNordic 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.