22x22x1 MERV 13 AC Furnace Filters 6 Pack rock-bottom Compatible with all growing mediums

Compatible with all growing mediums and watering methods

Features an internal manual damper which can be adjusted to open or close

thereby making the root system more efficient when absorbing nutrients and water

and ensure a safe electricity environment and normative operation

increase flowering sites

22x22x1 MERV 13 AC Furnace Filters 6 Pack rock-bottom Compatible with all growing mediumsNordic 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