21x23_1/4x1 Exact MERV 14 AC Furnace Filters 6 Pack Environmental Controllers tighter internodal spacing

tighter internodal spacing

hydroponic and ornamental crops

and vegetable seedlings and are compatible with various square-shaped available media plugs DRAIN HOLES – Cells have drainage holes

respiration

and armed with overheat protection

21x23_1/4x1 Exact MERV 14 AC Furnace Filters 6 Pack Environmental Controllers tighter internodal spacingNordic Pure MERV 14 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores, smoke particles, virus carriers, coughs and sneezes, smog, allergens and other contaminants are removed. MERV 14 furnace filters are comparable to HVAC filters with the rating of MPR 2800.