As cited, C57.12.00 is an IEEE document, and may or may not have be adopted by ANSI. At any rate, I doubt if it would give much guidance on room ventilation.
If you are in a pinch for older standards, global.ihs.com seems to have good service.
I know this is mutiny, but you might try posting at: eng-tips.com/gthreadminder.cfm/lev2/11/lev3/47/pid/238
[This message has been edited by Bjarney (edited 08-23-2002).]
