Listed as USDA BioPreferred
AIRPLATE S7 contains two fans and AIRPLATE S9 contains three fans
making it suitable for both slicing through stems and digging around tough root crops
Lightech T5's are designed specifically for indoor gardening
HORTILUX Metal Halide provides optimum spectral energy required for vegetative growth
20x21x1 Exact MERV 13 AC Furnace Filters 6 Pack microbes Listed as USDA BioPreferredNordic 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