16x28x1 Exact MERV 13 AC Furnace Filters 6 Pack Chemicals Back Flow Protection : Air

Back Flow Protection : Air gap in the fill cap prevents pressure built up

Slim linear design minimizes sunlight interference in greenhouses and can be tucked under existing support structure

B-Lite offers adjusted horticultural spectrum in HID grow lamps

Zero ozone production

16x28x1 Exact MERV 13 AC Furnace Filters 6 Pack Chemicals Back Flow Protection : AirNordic 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