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Old 2018-02-16, 4:43am
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Speedslug Speedslug is offline
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Join Date: Mar 21, 2009
Location: Winnebago, MN
Posts: 2,489
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Often you can reduce the noise that your neighbors will hear a little by adding another foot or two of duct work after the fan and also pointing the end straight upward with a rain hat on top.
(But that may require re-figuring your numbers.)

Good luck with the build.
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