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Why do the Sun Windows test show some of the lowest air infiltrations in the industry?

April 26, 2017air Industry infiltrations lowest Sun Test Windows

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Why do the Sun Windows test show some of the lowest air infiltrations in the industry?

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A. Sun focuses on providing Energy Efficient products. One aspect of this is minimizing air leaks or infiltration. The designs of Sun products effectively seal-out air infiltration, providing excellent energy efficiency and indoor comfort. Air infiltration is tested in accordance with ASTM:E 283-91 and AAMA/NWWDA 101/LS.2-97.