20x21x1 Exact MERV 14 AC Furnace Filters 12 Pack Aeromixer Synthetic Pro Edition Supports proper thermal control by

Supports proper thermal control by directing how the airflow moves throughout the rack and can be used in conjunction with a rack fan system

RELEASE: Release in temperatures above 50 and below 100 degrees

extremely good for plants at all stages from veg to bloom

The stinging conveys a paralyzing toxin to the pests

lady beetles and predatory mites

20x21x1 Exact MERV 14 AC Furnace Filters 12 Pack Aeromixer Synthetic Pro Edition Supports proper thermal control byNordic Pure MERV 14 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 14 furnace filters are comparable to HVAC filters with the rating of MPR 2800.