the efficiency of all air filters is rated according to the same criteria as set forth by ASHRAE
Nordic Pure 16x20x4 Plus Carbon Air Filters MERV 15 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
Ideal for customers with health problems or for commercial units which support a rating of MERV 14 and above
Nordic Pure 16x28x6 Aprilaire Space-Gard 2400 Replacement Air Filters Part 401 MERV 8 are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your workspace or office
17 1/8x34 7/8x1 MERV 13 AC Furnace Filters Number Per Box:6 the efficiency of all airActual Size: 17 x 34 3 4 x 3 4 (17 x 34. 75 x 0. 75) Removes lint, household dust, pollen, smoke particles, dust mites, pet dander, virus carriers, mold spores, smog and other contaminants. Ideal for customers looking for superior filtration Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame. Nordic Pure MERV 13 is equivalent to MPR 2200 2400 Made in the USA. Nordic Pure MERV 13 Pleated AC Furnace Air Filters