| CPC F24F 13/082 (2013.01) [F24F 1/56 (2013.01); F24F 11/46 (2018.01); F24F 13/20 (2013.01)] | 14 Claims |

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1. A louver comprising:
a plurality of slats arranged in a vertical direction or a horizontal direction;
each of the slats in the louver comprise a leading edge, a trailing edge opposite to the leading edge, a chord line connecting the leading edge with the trailing edge; and
each of the slats in the louver has a cambered profile, wherein the cambered profile includes a camber distance varying in the range of about 20%-25% from the leading edge and a camber height located at the camber distance, the camber height varying in the range of about 5%-15% of a total length of the cambered profile.
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