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a human hair is about 70 microns wide
It is important to note that because of this high filtration and air flow restriction
with a metal mesh support grid
The effective life of your AC air filter depends on both the inside and outside conditions in which you live
13x21 3/4x1 Exact MERV 13 AC Furnace Filters Number Per Box:6 a human hair is aboutActual Size: 13 x 21 3 4 x 3 4 (13 x 21. 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
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