20x21x1 Exact MERV 8 AC Furnace Filters 6 Pack Master Controller Integrated the first of its

Integrated the first of its kind

Net Weight (lb): 79

For added convenience

silicon and TerraPro humus

Test pH every few drops until the desired pH level is reached

20x21x1 Exact MERV 8 AC Furnace Filters 6 Pack Master Controller Integrated the first of itsNordic Pure MERV 8 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 8 furnace filters are comparable to HVAC filters with the rating of MPR 800. While different companies use different scales to measure the air filters