11 3/8x11 3/8x1 Exact MERV 14 AC Furnace Filters 12 Pack Environmental Controllers NPK: 0 - 23 -

NPK: 0 - 23 - 0

5' (45x45cm) Bloom stage and 2'x2' (60x60cm) Veg stage

Packaging Dimensions - 18" x 14" x 10"

Dolomitic and Calcitic limestone (pH adjuster)

along with a Nordic Pure MERV 8 rating

11 3/8x11 3/8x1 Exact MERV 14 AC Furnace Filters 12 Pack Environmental Controllers NPK: 0 - 23 -Nordic 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.