PDD Practice exam - mechanical duct layout

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    Michael Ermann

    That question is a bad one…I’m trying to get NCARB to change it…it’s based on an error in MEEB (that I’m also trying to get fixed in the next edition)
    Duct elbows do not help attenuate fan noise. This has been a myth, believed by many architects that architectural acousticians have been fighting against for years and NCARB suggesting that duct elbows mitigate fan noise on these exams that every architect sees has set that effort back decades. Argh,

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