<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><DIV>All:</DIV>
<DIV><BR>Question on Cool Roof and the way to simulate them in eQuest.<BR></DIV>
<DIV style="FONT-FAMILY: times new roman, new york, times, serif; FONT-SIZE: 12pt">
<DIV style="FONT-FAMILY: times new roman, new york, times, serif; FONT-SIZE: 12pt">
<DIV style="FONT-FAMILY: times new roman, new york, times, serif; FONT-SIZE: 12pt">
<DIV> </DIV>
<DIV>My boss came to me with a cool roof and asked me to do a quick eQuest on it. I did a 25,000 sf single story office in Los Angeles, saw the roof outside emissivity was 0.9. I changed it to 0.5 and the electric usage went UP. I change it again to 0.12 and the electric usage went up AGAIN. The HVAC is a standard single zone pacakge unit with furnace heat.</DIV>
<DIV> </DIV>
<DIV>Am I seeing reality or what am I missing?</DIV>
<DIV> </DIV>
<DIV>Thanks.</DIV>
<DIV> </DIV>
<DIV><BR>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><A name=_MailAutoSig rel=nofollow><SPAN style="COLOR: #1f497d"><FONT face=Calibri>John R. Aulbach, PE, CEM</FONT></SPAN></A></P>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN><SPAN style="COLOR: #1f497d"><FONT face=Calibri>Senior Energy Engineer</FONT></SPAN></SPAN></P>
<DIV style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN><SPAN style="COLOR: #17365d"><FONT face=Calibri>
<HR style="COLOR: #17365d" align=left SIZE=2 width="30%" noShade>
</FONT></SPAN></SPAN></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><FONT face=Calibri><SPAN><B><SPAN style="FONT-VARIANT: small-caps; COLOR: navy">Partner</SPAN></B></SPAN><SPAN><B><SPAN style="FONT-VARIANT: small-caps; COLOR: green"> </SPAN></B></SPAN><SPAN><B><SPAN style="FONT-VARIANT: small-caps; COLOR: #006600">Energy</SPAN><SPAN style="FONT-VARIANT: small-caps; COLOR: navy"></SPAN></B></SPAN></FONT></P>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN><SPAN style="COLOR: #1f497d"><FONT face=Calibri>1990 E. Grand Avenue, El Segundo, CA 90245<BR>W: 888-826-1216, X254| D: 310-765-7295 | F: 310-817-2745</FONT></SPAN></SPAN></P>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN></SPAN><A href="http://www.ptrenergy.com/" rel=nofollow target=_blank><FONT color=#800080><FONT face=Calibri><SPAN><SPAN>www.ptrenergy.com</SPAN></SPAN><SPAN></SPAN></FONT></FONT></A><SPAN><SPAN style="COLOR: #1f497d"><FONT face=Calibri> </FONT></SPAN></SPAN><A href="mailto:%7C%20jaulbach@ptrenergy.com" rel=nofollow target=_blank ymailto="mailto:%7C%20jaulbach@ptrenergy.com"><FONT color=#0000ff><FONT face=Calibri><SPAN><SPAN>| jaulbach@ptrenergy.com</SPAN></SPAN><SPAN></SPAN></FONT></FONT></A><SPAN><SPAN style="COLOR: #1f497d"></SPAN></SPAN></P><SPAN></SPAN>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN><FONT face=Calibri> </FONT></SPAN></P></DIV></DIV><BR></DIV></DIV></div><br></body></html>