18x27x1 MERV 13 AC Furnace Filters 6 Pack Growing Media requires little maintenance and comes

requires little maintenance and comes with a 2 year warranty

Fold these up and make a quick rosin bag

greenhouse

Modes : 2 (100%-50%)

18x27x1 MERV 13 AC Furnace Filters 6 Pack Growing Media requires little maintenance and comesNordic 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