27x27x1 MERV 13 AC Furnace Filters 6 Pack controllers Complies with the USA Federal

Complies with the USA Federal Standard 21 CFR 1040

Control the light cycle in your greenhouse & hoop house

It does not stop there

Built-in circuitry protects your investment from misuse

Breathe life into your soil with Nature's Pride Veg

27x27x1 MERV 13 AC Furnace Filters 6 Pack controllers Complies with the USA FederalNordic 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