20x21x1 Exact MERV 8 AC Furnace Filters 12 Pack extraction Ultra low-flow model

Ultra low-flow model

OMRI Listed for Organic Use – Approved for use in certified organic production

boosting the plant's disease resistance and stimulating accelerated growth

• Drain to waste hydroponic systems: Mix 2-5 ml per gallon water

The Original will provide a 4x4 foot or 128 cubic foot space with CO2 for 6 months guaranteed

20x21x1 Exact MERV 8 AC Furnace Filters 12 Pack extraction Ultra low-flow modelNordic Pure MERV 8 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 and other contaminants are removed. MERV 8 furnace filters are comparable to HVAC filters with the rating of MPR 800. While different companies use different scales to measure the air filters