18x28x1 Exact MERV 13 AC Furnace Filters 6 Pack pest-and-disease-control All natural ingredients (see Technical

All natural ingredients (see Technical tab for more detailed information)

Also functions as an excellent "finishing" formula for determinate plants

The timers can be set-up to be recycling timers

disinfects large volumes of fast moving air

Not only do they protect you from particulates

18x28x1 Exact MERV 13 AC Furnace Filters 6 Pack pest-and-disease-control All natural ingredients (see TechnicalNordic 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