14x22x1 Exact MERV 13 AC Furnace Filters 12 Pack Tents & Tarps The S50 digital display shows

The S50 digital display shows exact ppm readings down to 1 ppm resolution

Optimize Coverage - 3ft × 3ft

accessible location within your grow room or control area

Note: The Bluelab Carry Case does not come with a meter

Utilizing the latest in battery technology

14x22x1 Exact MERV 13 AC Furnace Filters 12 Pack Tents & Tarps The S50 digital display showsNordic 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