types of hepa filters for Dummies
Common Assortment Efficiency Curve with Filter Collection Mechanisms HEPA filters are made up of a mat of randomly arranged fibers.[sixteen] The fibers are typically composed of polypropylene or fiberglass with diameters involving 0.5 and 2.0 micrometers. Most of the time, these filters are made up of tangled bundles of fantastic fibers. These fibe