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Electronic Air Filters
Electronic air cleaners use an
electrical field to trap charged particles. Like mechanical filters,
they may be installed in central heating and/or air-conditioning
system ducts or may be portable units with fans.
Electronic air cleaners are usually
electrostatic precipitators or charged-media filters. In
electrostatic precipitators, particles are collected on a series of
flat plates. In charged-media filter devices, which are less common,
the particles are collected on the fibers in a filter.
In most electrostatic precipitators and some
charged-media filters, the particles are deliberately ionized
(charged) before the collection process, resulting in a higher
collection efficiency.
*Some of the information on this
page was collected from www.epa.gov
http://www.epa.gov/iaq/pubs/residair.html#Mechanical%20filters
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