What does a HEPA filter offer?
HEPA filters use a cloth-like filter that is specifically engineered to trap at least 99.9% of particles, 0.3 microns or larger in size. In comparison, a smoke particle is 0.5 microns in size, nearly twice as large as the particles that HEPA purifiers are designed to catch. Because of this technique, HEPA filters can be extremely effective in clearing out almost anything from the air in a room–just shut the door and let it run. All filtration systems of this type have a replaceable filter that can last up to five years, depending on the environment being filtered. Although the noise level of a HEPA is greater than that of an ionic purifier, it can usually handle a wider variety of pollutants in the air.
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