20x24x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon 1 Pack Air Filter Magnesium Phosphate

Magnesium Phosphate

Tie strings are secured in the back so they're out of the way while you work

Heavy: 20mL / Gallon

The water repellent granulates are superior substitutes for aerators such as perlite or Styrofoam

20x24x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon 1 Pack Air Filter Magnesium PhosphateNordic Pure 20x24x4 MERV 12 Pleated Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer. This results in less flow restriction and 33% more surface area for cleaner smelling air. It will help eliminate unwanted odors as well as trap most airborne dust and particulate matter for fresh, clean air. Odorous gases and vapors (VOC) are attracted to and held by the activated carbon