PDD Practice exam - mechanical duct layout

Yihan Wang

July 21, 2022 07:34

The client wants privacy and minimal noise within individual offices.

Which one of the design options is most appropriate?

Why option B? Does more bends mean more noise?

0

Comments

3 comments

Michael Ermann July 21, 2022 10:26

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,

1

Comment actions Permalink
Rachel Baker August 09, 2022 18:10

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

0

Comment actions Permalink
Michael Ermann August 09, 2022 19:01

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.

0

Comment actions Permalink

Please sign in to leave a comment.

Powered by Zendesk