20x21x1 Exact MERV 8 Plus Carbon AC Furnace Filters 12 Pack cube PPFD/PAR: Measures the total number

PPFD/PAR: Measures the total number of photons within the PAR region specific to plant growth

Using natural compounds to combat mildew pressure minimizes the stress on your plants

Assembled dimensions:

see the Instructions Sheet or refer to the Instructions Tab to the right (desktop) or below (mobile)

Full battery charge will complete 4

20x21x1 Exact MERV 8 Plus Carbon AC Furnace Filters 12 Pack cube PPFD/PAR: Measures the total numberNordic 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.