Motivation. Particles are generally regarded as one of the most serious indoor air quality concerns Increasing concern about ultrafine particles Very high surface area/unit mass Direct transfer through cell walls Mechanism for respiratory disease “Asbestos-like” health effects. 1.
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Arrestance describes how well an air filter removes larger particles such as dirt, lint, hair, and dust
through sheath air
Efficiency as a function of particle diameter as measured with (a) Optical particle counter and (b) Aerodynamic particle sizer