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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=671593621-23072007>Brandon,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=671593621-23072007>Mysterious. </SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=671593621-23072007></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=671593621-23072007>What's you overall building use (BTU/sf)? Is the
glazing are significant? Where is this building located? (I have done a
similar study in Hawaii where I found that single glazing performs better than
double, because the weather was good for it. </SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=671593621-23072007>A good quick gut check is to look at the LS-F
reports and see what percentage of the loads are coming from window conductance.
</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV><!-- Converted from text/rtf format -->
<P><B><FONT face=Garamond color=#000000>Vikram Sami,</FONT></B> <FONT
face=Garamond color=#000000>LEED AP</FONT><B></B> <BR><FONT face=Garamond
color=#000000>Direct Phone 404-253-1466 | Direct Fax 404-253-1366</FONT> </P>
<P><B><FONT face=Garamond color=#800000>L</FONT><FONT face=Garamond
color=#800000 size=2>ORD</FONT><FONT face=Garamond color=#800000>, A</FONT><FONT
face=Garamond color=#800000 size=2>ECK</FONT><FONT face=Garamond color=#800000>
& S</FONT><FONT face=Garamond color=#800000 size=2>ARGENT</FONT><FONT
face=Garamond color=#800000> A</FONT><FONT face=Garamond color=#800000
size=2>RCHITECTURE</FONT><BR></B><FONT face=Garamond size=2>1201 Peachtree
Street NE, Suite 300, Atlanta, GA 30361</FONT> <BR><FONT face=Garamond
size=2>Responsive Design</FONT> <FONT face=Symbol size=1>·<FONT
face="Courier New"></FONT></FONT> <FONT face=Garamond size=2>Technological
Expertise</FONT> <FONT face=Symbol size=1>·<FONT
face="Courier New"></FONT></FONT> <FONT face=Garamond size=2>Exceptional
Service</FONT> <BR><FONT face=Garamond
color=#000000>www.lordaecksargent.com</FONT> </P>
<P><B><FONT face=Garamond color=#008000>Please don't print this email unless you
really have to</FONT></B><I><FONT face=Garamond color=#008000>.</FONT></I>
<BR><I><FONT face=Garamond color=#008000>In the United States, we use enough
office paper each year to build a 10-foot high wall that’s 6,815 miles long or
two and a half times the distance from New York to Los Angeles. </FONT></I></P>
<P><I><FONT face=Garamond color=#008000>~ Wisconsin Department of Natural
Resources, “Recycling Facts and Figures,” PUBL CE-163, 2002.</FONT></I> </P>
<DIV> </DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> BLDG-SIM@gard.com
[mailto:BLDG-SIM@gard.com] <B>On Behalf Of </B>Brandon Nichols<BR><B>Sent:</B>
Monday, July 23, 2007 5:10 PM<BR><B>To:</B> BLDG-SIM@gard.com<BR><B>Subject:</B>
[BLDG-SIM] Simulations Insensitive to Glass Changes<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV dir=ltr align=left><FONT face="Courier New" color=#0000ff size=2><SPAN
class=719335320-23072007>All,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face="Courier New" color=#0000ff size=2><SPAN
class=719335320-23072007></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face="Courier New" color=#0000ff size=2><SPAN
class=719335320-23072007>I have a 3-story historic building, with
circa-1920's windows on all four exposures. Big, beautiful, clear-glass
single-pane architectural masterpieces. So while doing an optimization
study, it became apparent to me that substantially changing the U-value and
infiltration coefficients was having very little effect at all on the
loads.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face="Courier New" color=#0000ff size=2><SPAN
class=719335320-23072007></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face="Courier New" color=#0000ff size=2><SPAN
class=719335320-23072007>For example, varying the U-value from 1.27 to
0.55, 0.45 and at last 0.30 in the parametric runs using the
'simplified method' produced a 0.5% total (over all runs) change in the total
energy consumption. Selecting representative glass types using the
'library method' produced essentially equivalent. Superimposing upon
either of these a change in the infiltration coefficient from 1/4" to 1/8" to
1/16" to 1/32" produced no additional effect at all (the INF-METHOD = CRACK
keyword is specified) on the annual energy consumption.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face="Courier New" color=#0000ff size=2><SPAN
class=719335320-23072007></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face="Courier New" color=#0000ff size=2><SPAN
class=719335320-23072007>Lastly, I changed the baseline glass to "unglazed
opening", again with a mystifying zero net effect on the overall
energy consumption. It's as if the glass is not being calculated at
all, but I see no errors or warnings in the SIM file.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face="Courier New" color=#0000ff size=2><SPAN
class=719335320-23072007></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face="Courier New" color=#0000ff size=2><SPAN
class=719335320-23072007>Anyone have an idea on how to debug
this?</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face="Courier New" color=#0000ff size=2><SPAN
class=719335320-23072007></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face="Courier New" color=#0000ff size=2><SPAN
class=719335320-23072007>Thanks in advance...</SPAN></FONT></DIV>
<DIV><FONT face="Courier New" color=#0000ff size=2></FONT> </DIV>
<DIV align=left>
<DIV align=left><FONT face=Arial size=2></FONT> </DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt">
<DIV><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"><SPAN
class=212011020-11052004><FONT color=#000000>Brandon Nichols,
PE</FONT></SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"><SPAN
class=212011020-11052004><FONT
color=#000000>Mechanical</FONT></SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"><FONT
color=#000080><STRONG>HARGIS ENGINEERS</STRONG></FONT></DIV>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"><FONT
color=#515151>600 Stewart Street</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"><FONT
color=#515151>Suite 1000</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"><FONT
color=#515151>Seattle, WA 98101<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"><FONT
color=#515151>www.hargis.biz<o:p></o:p></FONT></SPAN></P>
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style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"><FONT
color=#515151> <o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><B><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt">d
|</SPAN></B><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt">
206.436.04<SPAN class=212011020-11052004>0</SPAN>0<SPAN
style="mso-spacerun: yes"> </SPAN><B>c | </B>206.<SPAN
class=212011020-11052004>228.8707</SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"><SPAN
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|</SPAN></B><SPAN
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206.448.3376<SPAN style="mso-spacerun: yes"> </SPAN><B>f <SPAN
style="mso-spacerun: yes"> </SPAN>|</B>
206.448.4450</SPAN></FONT></P></SPAN></SPAN>
<DIV> </DIV></DIV>
<DIV><FONT face="Courier New" color=#0000ff size=2></FONT> </DIV><PRE>
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