20x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Environmental Controllers we recommend using a Phat

we recommend using a Phat Muffler on both the intake and exit of your inline fan

Humidifier

and reduces crop production time

Puck size is 4

and then again as it exits

20x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Environmental Controllers we recommend using a PhatNordic 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.