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xmlns:ns12 = "urn:schemas-microsoft-com:"><HEAD><TITLE>Simple question...hopefully</TITLE>
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<DIV dir=ltr align=left><SPAN class=920101821-16112009><FONT face=Arial
color=#0000ff size=2>Thank you all for responding. I understand the issue
more clearly now. Your comments are very much
appreciated.</FONT></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> Kevin Kyte [mailto:KKyte@watts-ae.com]
<BR><B>Sent:</B> Monday, November 16, 2009 12:46 PM<BR><B>To:</B> Nick Caton;
David Delasantos; equest-users@lists.onebuilding.org<BR><B>Subject:</B> RE:
[Equest-users] Simple question...hopefully<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Increased glazing
performance may result in less thermal transfer through the envelope. This
may result in increased or deceased energy savings. Depending on climate,
varying heat transfer through fenestration may result in more energy use in the
winter and less in the summer or vice versa. There is usually a happen
middle point which will give the best returns. The same applies to
increasing and decreasing insulation.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<DIV>
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face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">
<HR tabIndex=-1 align=center width="100%" SIZE=2>
</SPAN></FONT></DIV>
<P class=MsoNormal><B><FONT face=Tahoma size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> Nick
Caton [mailto:ncaton@smithboucher.com] <BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Monday, November 16, 2009 12:21
PM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> David Delasantos;
<st1:PersonName
w:st="on">equest-users@lists.onebuilding.org</st1:PersonName><BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [Equest-users] Simple
question...hopefully</SPAN></FONT><o:p></o:p></P></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Calibri color=#1f497d size=2><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: Calibri">In a recent
project, our architect decided to “upgrade” to nicer (more expensive)
glass. These fenestrations had marginally better thermal properties, so I
had the same surprise to find the annual energy figures going
UP…<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Calibri color=#1f497d size=2><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: Calibri"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Calibri color=#1f497d size=2><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: Calibri">After some
investigation, it turned into an important design lesson which may or may not
apply to your case: This project had a significant amount of
daylighting, and the “improved” glass had a significantly lower Tvis
figure. Less light in means more energy spent on the lighting
system!<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Calibri color=#1f497d size=2><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: Calibri"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Calibri color=#1f497d size=2><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: Calibri">In the role of
lighting system designer, I used to ignore things like glass transmissivity, as
I was taught to design around the worst case (i.e. nighttime where window
contributions have little/no effect)… now I pay very close attention when
daylight harvesting is a part of the project!<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Calibri color=#1f497d size=2><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: Calibri"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Calibri color=#1f497d size=2><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: Calibri">Hope this helps
either your current situation, or otherwise in the
future!<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Calibri color=#1f497d size=2><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: Calibri"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Calibri color=#1f497d size=2><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: Calibri">~Nick<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Calibri color=#1f497d size=2><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: Calibri"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<P class=MsoNormal><FONT face=Calibri color=#1f497d size=2><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: Calibri"><IMG
id=Picture_x005f_x0020_1 height=37 alt=cid:489575314@22072009-0ABB
src="cid:920101821@16112009-0413" width=119></SPAN></FONT><B><FONT
face="Stylus BT" color=#2d4d5e size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 11pt; COLOR: #2d4d5e; FONT-FAMILY: 'Stylus BT'"><o:p></o:p></SPAN></FONT></B></P>
<P class=MsoNormal><B><FONT face="Stylus BT" color=#2d4d5e size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 11pt; COLOR: #2d4d5e; FONT-FAMILY: 'Stylus BT'"><o:p> </o:p></SPAN></FONT></B></P>
<P class=MsoNormal><B><FONT face="Stylus BT" color=#2d4d5e size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 11pt; COLOR: #2d4d5e; FONT-FAMILY: 'Stylus BT'">NICK
CATON, E.I.T.</SPAN></FONT></B><B><FONT face="Stylus BT" color=#2d4d5e><SPAN
style="FONT-WEIGHT: bold; COLOR: #2d4d5e; FONT-FAMILY: 'Stylus BT'"><o:p></o:p></SPAN></FONT></B></P>
<P class=MsoNormal><FONT face=Calibri color=#cc9900 size=1><SPAN
style="FONT-SIZE: 7.5pt; COLOR: #cc9900; FONT-FAMILY: Calibri">PROJECT
ENGINEER</SPAN></FONT><FONT color=#cc9900 size=1><SPAN
style="FONT-SIZE: 7.5pt; COLOR: #cc9900"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Calibri color=#2d4d5e size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: #2d4d5e; FONT-FAMILY: Calibri">25501 west valley
parkway<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><st1:City w:st="on"><st1:place w:st="on"><FONT face=Calibri
color=#2d4d5e size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: #2d4d5e; FONT-FAMILY: Calibri">olathe</SPAN></FONT></st1:place></st1:City><FONT
face=Calibri color=#2d4d5e size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: #2d4d5e; FONT-FAMILY: Calibri"> ks
66061<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Calibri color=#2d4d5e size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: #2d4d5e; FONT-FAMILY: Calibri">direct 913
344.0036<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Calibri color=#2d4d5e size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: #2d4d5e; FONT-FAMILY: Calibri">fax 913
345.0617<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><I><FONT face=Calibri color=#2d4d5e size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: #2d4d5e; FONT-STYLE: italic; FONT-FAMILY: Calibri">Check
out our new web-site @ </SPAN></FONT></I><FONT face=Calibri color=#1f497d
size=2><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: Calibri"><A
title=blocked::www.smithboucher.com href="www.smithboucher.com"><FONT
size=2><SPAN
style="FONT-SIZE: 10pt">www.smithboucher.com</SPAN></FONT></A></SPAN></FONT><U><FONT
face=Calibri color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Calibri">
</SPAN></FONT></U><FONT face=Calibri color=#1f497d size=2><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: Calibri"><o:p></o:p></SPAN></FONT></P></DIV>
<P class=MsoNormal><FONT face=Calibri color=#1f497d size=2><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: Calibri"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<DIV
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; PADDING-LEFT: 0in; PADDING-BOTTOM: 0in; BORDER-LEFT: medium none; PADDING-TOP: 3pt; BORDER-BOTTOM: medium none">
<P class=MsoNormal><B><FONT face=Tahoma size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>David Delasantos<BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Monday, November 16, 2009 11:02
AM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> <st1:PersonName
w:st="on">equest-users@lists.onebuilding.org</st1:PersonName><BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> [Equest-users] Simple
question...hopefully<o:p></o:p></SPAN></FONT></P></DIV></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<P><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I
ran a very quick and dirty EEM to compare the effects of using a different glass
type when compared to the baseline model, which was created in the SD
Wizard. Contrary to my expectations, the higher performance glass resulted
in<I><SPAN style="FONT-STYLE: italic"> higher</SPAN></I> annual energy
usage! The glazing is the only component I changed in the model. If
anyone can speak to this result, I would appreciate
it.</SPAN></FONT><o:p></o:p></P>
<P><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Thank you…DD</SPAN></FONT>
<o:p></o:p></P></DIV></BODY></HTML>