21x22x1 MERV 13 Plus Carbon AC Furnace Filters 18x28x1 The electrostatic charge works as

The electrostatic charge works as a magnet to draw in and trap smaller airborne particles

Ideal for customers with health problems or for commercial units which support a rating of MERV 14 and above

Actual Size: 20 x 20 1/2 x 3/4 (20 x 20

Nordic Pure 18x24x4 MERV 14 Plus Carbon air filters are made of electrostatically charged synthetic materials with an added flat panel infused with activated charcoal that will attract and capture most airborne particulates in your home

21x22x1 MERV 13 Plus Carbon AC Furnace Filters 18x28x1 The electrostatic charge works asActual Size: 20 1 2 x 21 1 2 x 3 4 (20. 5 x 21. 5 x 0. 75) Removes lint, household dust, pollen, smoke particles, dust mites, pet dander, smog, virus carriers, mold spores, help eliminate unwanted odors and other contaminants. Ideal for customers looking for superior filtration but needing an odor control element Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame. Nordic Pure MERV 13 is equivalent to MPR 2200 2400