21x27x1 Trane Replacement MERV 13 AC Furnace Filters 6 Pack reflective-and-greenhouse-films 4 outlets controlled by mechanical

4 outlets controlled by mechanical timer with 15 minute on/off increments

* High dehumidification capacity

The reduction of oxygen to the roots from bio-film formation is the major cause of root rot

made from food-grade ingredients

Changing the pitch allows for faster or slower pass-through rates

21x27x1 Trane Replacement MERV 13 AC Furnace Filters 6 Pack reflective-and-greenhouse-films 4 outlets controlled by mechanicalNordic 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