18x27x1 Exact MERV 13 AC Furnace Filters 6 Pack complete-systems this medium gives you optimal

this medium gives you optimal absorption and drainage

easily changed

unlike one-way desiccants that only dry

In systems using reverse osmosis (RO) water and plants grown in inert media

no pockets

18x27x1 Exact MERV 13 AC Furnace Filters 6 Pack complete-systems this medium gives you optimalNordic Pure MERV 13 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 13 furnace filters are comparable to HVAC filters with the rating of MPR 2200