8x8x1 Exact MERV 13 AC Furnace Filters 6 Pack AC / Dehumidification / Humidification • Patented WEDGE shape encourages

• Patented WEDGE shape encourages root growth downward

Grodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone wool substrate and irrigation strategies for specialty crops

hour (180x faster than hand sorting)

Add 12 ml per gallon of water once per week or with every feeding

8x8x1 Exact MERV 13 AC Furnace Filters 6 Pack AC / Dehumidification / Humidification • Patented WEDGE shape encouragesNordic 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