[BLDG-SIM] System Type in Appendix G

[Bill Talbert]

All,
I'm working on a LEED energy analysis for a small healthcare clinic
project (~15K sqft). According to A90.1-2004 Appendix G, Table G3.1.1A, 
the baseline HVAC system for a nonresidential building with <=3 floors,
<75K sqft, and fossil fuel heating should be a packaged single zone
system with DX cooling and a gas-fired furnace for heating. This seems
like a big departure from the baseline system types indicated in the ECB
method. Is this a correct interpretation? If so, can anyone provide
feedback as to why this change was made?  It seems as though many
buildings of this size would utilize a packaged rooftop VAV. Also, it
potentially makes the number of systems necessary in the baseline
building significantly high unless the thermal blocks are simplified in
the proposed design model.
Thanks,
Bill Talbert, LEED AP
Mechanical Engineer
Phone: (608) 441-6677





======================================================
You received this e-mail because you are subscribed 
to the BLDG-SIM at GARD.COM mailing list.  To unsubscribe 
from this mailing list send a blank message to 
BLDG-SIM-UNSUBSCRIBE at GARD.COM
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20061212/8c805355/attachment.htm>