14x27x1 Exact MERV 12 AC Furnace Filters 6 Pack DUCTWORK Highly concentrated

Highly concentrated

Each unit delivers the necessary humidity needed during early growth cycles all the way through harvest

with a balanced calcium and nitrogen ratio

The food-grade raw materials used are free of heavy metals and are safe to use

There is a proportional relationship between the number of photons absorbed in 400 to 700nm band and the rate of photosynthesis in plants

14x27x1 Exact MERV 12 AC Furnace Filters 6 Pack DUCTWORK Highly concentratedNordic Pure MERV 12 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, allergens and other contaminants are removed. MERV 12 furnace filters are comparable to HVAC filters with the rating of MPR 1500 1900. While different