21_1/4x21_1/4x1 Exact MERV 14 AC Furnace Filters 6 Pack spl_hf Higher sensitivity control allows precise

Higher sensitivity control allows precise flow adjustments

0-8560 ppm

Brewkit is refrigerated for maximum freshness

2 to 3 feeds per day are generally enough for 60/40

5 m coaxial cable to allow measurements to be taken from a distance without any interference from the operator

21_1/4x21_1/4x1 Exact MERV 14 AC Furnace Filters 6 Pack spl_hf Higher sensitivity control allows preciseNordic Pure MERV 14 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 14 furnace filters are comparable to HVAC filters with the rating of MPR 2800.