20x21x1 Exact MERV 8 AC Furnace Filters 12 Pack extraction Pre-soak starter grow medium up

Pre-soak starter grow medium up to 15 min prior to placing new cuttings

Ultra low-flow model

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

Measures 40'' x 86''

20x21x1 Exact MERV 8 AC Furnace Filters 12 Pack extraction Pre-soak starter grow medium upNordic 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