18x27x1 Exact MERV 14 AC Furnace Filters 6 Pack aaron Its unique source of potassium

Its unique source of potassium reacted with soluble silica results in a nutrient dense plant food that is absorbed in far greater amounts than traditional potassium

They are also suitable as a diet supplement for insectivorous birds

5" Tri-edge

please refer to performance chart found in the product information tab

18x27x1 Exact MERV 14 AC Furnace Filters 6 Pack aaron Its unique source of potassiumNordic 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.