21x21x1 MERV 13 AC Furnace Filters 6 Pack ph-ec-tds-meters-and-solutions Well suited for low-light growing

Well suited for low-light growing conditions and high humidity

a cleaning agent

The system is housed in a solid aluminum construction that takes up three rack units of space (3U)

sidewalks & patios

This product is corrosive and a strong oxidizing agent

21x21x1 MERV 13 AC Furnace Filters 6 Pack ph-ec-tds-meters-and-solutions Well suited for low-light growingNordic 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