13x21x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Sea Green Hydro This horizontally mounted dual CMH

This horizontally mounted dual CMH provides much higher amounts of plant loving UV and spectrum

research facility

Light blocking mixing chamber sunshade for 3/4″ mixing chambers

Gel filled (non-refillable) making it maintenance free and a double junction reference providing longer life

It is also beneficial if growing outdoors to absorb maximum exposure to natural sunlight

13x21x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Sea Green Hydro This horizontally mounted dual CMHNordic 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.