Air filter unit with several filter elements
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United States of America Patent
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Nov 7, 2006
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N/A
app pub date -
Mar 25, 2004
filing date -
Apr 17, 2003
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Abstract
A filter unit for the purification of air includes at least a first filter element, which contains granular, especially spherical, activated carbon as an adsorbent material, and at least a second filter element, which contains a combination of granular, especially spherical, activated carbon and activated carbon fibers as an adsorbent material. The filter unit is suitable especially for use in ventilation plants, ventilation systems, air-conditioning systems and the like.
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