13x21x1 Exact MERV 10 AC Furnace Filters 6 Pack misc The different scales can be

The different scales can be selected through two keys on the front panel and two separate LEDs indicate which parameter is being tested

Citric Acid

the SUNp lens offers full UV protection while working under the biggest grow light of all: the sun

hand-feeding

Power Draw: 150W

13x21x1 Exact MERV 10 AC Furnace Filters 6 Pack misc The different scales can beNordic Pure MERV 10 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, allergens and other contaminants are removed. MERV 10 furnace filters are comparable to HVAC filters with the rating of MPR 900 1000. While different companies