Since December 2004, Wooju Eltec Co., Ltd. commercialized Air purifying devices that employs "e-Nano film filter" which invented first in the similar business fields. VAV air purifier a strongly and effectively removes polluted indoor air that threaten our family. It prevents new-house and new-car syndropmes by removing fine dust (smoke, yellow dust, pollen), bad smell, germs, bacteria and so on with its "e-Nano film filter". Protect your loving family from indoor air contaminants with VAV air purifying device.