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Germicidal air cleaners designed to kill most bacteria (e.g., Mycobacterium tuberculosis) and many virus types using ultraviolet (UV) radiation. These devices are typically enclosed metal (usually stainless steel) air cleaners with UV (radiation at 254 nm is typical) lamps, particulate filters, fans, and switches. UV germicidal air cleaners are intended for continuous use in healthcare facilities, including waiting rooms and doctors\' offices, especially where ceiling height or other conditions do not allow the installation of UV lamps higher than 7 feet; the devices are less effective against fungus and bacteria spores.
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