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<P><FONT SIZE=2 FACE="Arial">Hi All,</FONT>
<BR><FONT SIZE=2 FACE="Arial">I am trying to do an energy modeling using ASHRAE 90.1 performance rating method for a building in Mexico City, Mexico. I am trying to figure out where Mexico City would fall under for the climate zone. Table B-3 tells me the Zone number but it does not tell me the Climate Type (A, B or C). So, I followed the Table B-4. This does not classify between A or B for zone 3 based on the degree days. I also went through Appendix B2 (Major climate type definitions) page 109. I was able to climate that it is not Climate Zone type C. But in order to verify whether I am in B, I need to know the annual precipitation. Where do I get this value from? Will it be in ASHRAE or any other standards? I searched in the website and I am getting different values for Mexico city precipitation. Depending on this I would either fall in A or B. Would like to follow some standards rather than searching in the website. </FONT></P>
<P><FONT SIZE=2 FACE="Arial">I am writing this story because I need to figure out whether my baseline would require an economizer or not. Zone-3A does not require an economizer where as Zone-3B does. </FONT></P>
<P><FONT SIZE=2 FACE="Arial">Any guidance will be appreciated.</FONT>
<BR><FONT SIZE=2 FACE="Arial">Thanks,</FONT>
<BR><FONT SIZE=2 FACE="Arial">Yuvaraj</FONT>
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<P><FONT SIZE=2 FACE="Arial">_</FONT><FONT COLOR="#000000" SIZE=2 FACE="Arial">_____________________________________________</FONT>
<BR><FONT COLOR="#000000" SIZE=2 FACE="Arial">Yuvaraj Saravanan, PE</FONT>
<BR><FONT COLOR="#000000" SIZE=2 FACE="Arial">Engineer</FONT>
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<P><FONT COLOR="#000000" SIZE=2 FACE="Arial">Arup </FONT>
<BR><FONT COLOR="#000000" SIZE=2 FACE="Arial">12777 West Jefferson Boulevard Suite 200</FONT>
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<BR><FONT COLOR="#000000" SIZE=1 FACE="Arial">tel: 1 310 578 4400</FONT>
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<BR><FONT COLOR="#000000" SIZE=1 FACE="Arial">yuvaraj.saravanan@arup.com</FONT><BR>
<A HREF="file://www.arup.com"><U></U><U><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">www.arup.com</FONT></U></A>
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