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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    Rachel Baker

    So in these situations, NCARB is looking for THEIR answer? It feels so backwards!

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    Michael Ermann

    UPDATE: I received assurances from MEEB’s authors that the next edition of the book will fix that passage…and from NCARB that they will very soon replace that bad question with a better one one.

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