17x19x1 Exact MERV 13 AC Furnace Filters 12 Pack Trimmers Safe to beneficial or large

Safe to beneficial or large insects such as bees

The relative humidity level is displayed in bold on the digital screen for easy readings and quick adjustments

This controller has the capability to run a maximum of (8) 1000W ballasts using 120V power

and larger enclosures

With AWOL bags you can take your harvest to the Bank

17x19x1 Exact MERV 13 AC Furnace Filters 12 Pack Trimmers Safe to beneficial or largeNordic 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