21x27x1 Trane Replacement MERV 13 AC Furnace Filters 6 Pack reflective-and-greenhouse-films Extra oxygen stimulates protein production

Extra oxygen stimulates protein production at the cellular level in your plants

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

indoors or outdoors

* High dehumidification capacity

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

21x27x1 Trane Replacement MERV 13 AC Furnace Filters 6 Pack reflective-and-greenhouse-films Extra oxygen stimulates protein productionNordic 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