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  • Air filters that are intended to remove either solid or liquid particulates (i.e., aerosols) from the air stream. These filters may perform either mechanical or electrostatically enhanced filtration. Mechanical filters are typically composed of fibers (e.g., cotton, fiberglass, polyester) woven together tightly; the particles are caught as the air passes through (i.e., perpendicular) to the woven material. Electrostatic filtration uses electrostatically enhanced (i.e., polarized) fibers that attract and retain particulates. Special filters intended to remove very fine particles and droplets are available; they are used in air filtration and cleaning systems to remove airborne pathogens and to obtain a clean environment (e.g., clean rooms) and/or laminar air flow conditions.
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