20x21x1 Exact MERV 14 AC Furnace Filters 12 Pack Aeromixer Synthetic Pro Edition General Application: Use 3-7 ml

General Application: Use 3-7 ml per gallon of water or nutrient solution

– Move large plants indoors and outdoors with ease

extremely good for plants at all stages from veg to bloom

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

features a convenient transport/hanging handle

20x21x1 Exact MERV 14 AC Furnace Filters 12 Pack Aeromixer Synthetic Pro Edition General Application: Use 3-7 mlNordic 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.