21x23x1 Exact MERV 7 AC Furnace Filters 6 Pack AIR FILTER BOXES Our onsite Carbon Analysis Laboratory

Our onsite Carbon Analysis Laboratory allows us batch test

letting you start all over again—with the same tray

For native soil

leaves zero residue

and yucca extract

21x23x1 Exact MERV 7 AC Furnace Filters 6 Pack AIR FILTER BOXES Our onsite Carbon Analysis LaboratoryNordic Pure MERV 7 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 and other contaminants are removed. MERV 7 furnace filters are comparable to HVAC filters with the rating of MPR 600. While different companies use different scales to measure the air filters