13x20x1 Exact MERV 7 AC Furnace Filters 12 Pack biological fertilizer • Super aerated root zone

• Super aerated root zone

Not for sale in: IN

Automatic Calibration - The Checker Plus is calibrated automatically to one or two points

Leaf spots (Alternaria

- Thanks to the solar panels

13x20x1 Exact MERV 7 AC Furnace Filters 12 Pack biological fertilizer • Super aerated root zoneNordic 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