[Bldg-sim] 90.1-2004 APPENDIX G: Design Air Flow Rates

[Howe, Timothy]

Does anyone have any information on any ASHRAE 90.1-2004 addenda that addresses G3.1.2.8 Design Air Flow Rates.
 
The 2004 standard uses a 20°F delta T to size the supply air flows.  
 
I have a lab project where the supply air needs to be 100% OA and 8 AC per hour.
 
I read here: http://www.i2sl.org/eleclibrary/documents/maor.pdf See page 22 that supposedly there is an Addendum that addresses this issue.
 
Does anyone know where I can find that?  I have looked through all the Addendum on the ASHRAE website and came up empty.
 
I guess the only other thing I think is a loophole is G3.1.2.5: which states that the baseline and proposed must have the same ventilation rates.  This to me reads that if you are required to supply say 100% OA then both case should have it.
 
Any suggestions?
 
Thanks!
 
Tim.
 
Timothy Howe, MS, LEED AP
Mechanical Engineer
Stantec

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