17x22x1 MERV 13 AC Furnace Filters 12 Pack chillers-heaters-and-purification Outside Diameter: 31 cm /

Outside Diameter: 31 cm / 12

For use as a biopesticide (insecticide

Nearly silent start and stop operation

Plasma Air ionizers are designed to produce minimal to no ozone

Also Contains non plant food ingredient: Kelp

17x22x1 MERV 13 AC Furnace Filters 12 Pack chillers-heaters-and-purification Outside Diameter: 31 cm /Nordic 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