There can be a large difference but depends on your particular building. For example, buildings with lots of glass on the east and west. The cooling loads in these individual spaces may be quite large, but the east has a high cooling load in the morning while the west has a high cooling load in the afternoon/evening. My understanding for LEED is that the design case systems are sized as in the design documents. This provides punishment for system inefficiency due to oversizing.<br>
<br>--<br>Karen<br><br><br><div class="gmail_quote">On Thu, May 1, 2008 at 3:24 AM, <<a href="mailto:yizhao1@vt.edu">yizhao1@vt.edu</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi -<br>
How great the difference could be if a system is sized by "block" compaired to<br>
being sized by "peak" in Trace? If "sized by peak" means sizing the system<br>
based on peak load, what about "sized by block"? For LEED credit application, Iov<br>
thought that it is not right to size an AHU by "block" in the design case while<br>
size it by "peak" in the baseline.<br>
<br>
Thanks!<br>
<br>
Ying<br>
<br>
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