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<DIV dir=ltr align=left><FONT face=Arial color=#008000 size=2><SPAN
class=031373723-25042007>Kevin,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#008000 size=2><SPAN
class=031373723-25042007></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#008000 size=2><SPAN
class=031373723-25042007>There is a method using LBL Window program
that get the U-Factor for the actual frame into the DOE-2 report
without requiring you to get the frame/mullion details and then model this in
Therm:</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#008000 size=2><SPAN
class=031373723-25042007></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#008000 size=2><SPAN
class=031373723-25042007>First, based on selection of the actual glass from the
international glazing database, do the center-of glass calculation for the
glazing unit within that part of Window5. Then use the U-Factor charts for the
frame/mullion system(s) you plan to use or are considering (provided by most
supplies of curtain wall systems, etc.) to determine what the glazing system
U-factor should be for the appropriate ratio of glazed area to total area
including frame. Then return to Window5 and <EM>match</EM> the system U-Factor
from this chart by copying and modifying properties for the closest available
frame type/material in the Window5 frame library, checking the Total Window
Results when combined with your glazing unit. When, given the same
glass-to-frame area ratio, this result matches the one from the system
U-Factor chart for the frame/mullion system, you can then create the DOE-2
report from Window5 that you will reference in eQuest. Thus you will have the
angular optical data for the correct SHGC at each angle of incidence and also an
appropriate system U-Factor without having to actually model the frame. This is
particularly valuable if you are weighing a range of frame systems with various
insulating properties that also force or enable different glazing units (i.e.,
they have a different maximum glazing pocket) and you want to see the difference
in the whole-building model.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#008000 size=2><SPAN
class=031373723-25042007></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#008000 size=2><SPAN
class=031373723-25042007>Cheers,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#008000 size=2><SPAN
class=031373723-25042007>Timothy</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#008000 size=2><SPAN
class=031373723-25042007>
<DIV class=Section1>
<DIV>
<DIV>
<DIV>
<P align=left><SPAN
style="FONT-SIZE: 10pt; COLOR: green; FONT-FAMILY: Arial">**********************************************<BR></SPAN><SPAN
style="FONT-SIZE: 10pt; COLOR: green; FONT-FAMILY: Arial">Timothy
Moore<BR>Integrated Sustainable Design Consultant <BR>LEED
AP<o:p></o:p></SPAN></P>
<P><SPAN style="FONT-SIZE: 10pt; COLOR: green; FONT-FAMILY: Arial">Whole Systems
Design<BR>910 Indian Rock Ave.<BR>Berkeley, CA 94707<BR>Ph: (510)
525-4809<BR>Fx: (413) 480-7252<BR>Mobile: (303) 324-1044</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><BR></SPAN><A
href="mailto:tmoore@whole-systems-design.com"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">tmoore@whole-systems-design.com</SPAN></A></P>
<P><o:p> </o:p></P></DIV></DIV></DIV></DIV></SPAN></FONT></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>D. Charlie
Curcija<BR><B>Sent:</B> Wednesday, April 25, 2007 6:22 AM<BR><B>To:</B>
BLDG-SIM@gard.com<BR><B>Subject:</B> [BLDG-SIM] Simplied windows and glass
libraries<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV dir=ltr align=left><SPAN class=328230613-25042007><FONT face=Arial
color=#0000ff>Kevin,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=328230613-25042007><FONT face=Arial
color=#0000ff></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=328230613-25042007><FONT face=Arial
color=#0000ff>The best way to accurately model windows is with WINDOW and THERM
software (windows.lbl.gov). These tools are also used for NFRC (National
Fenestration Rating Council) certifications. However, you will need all of
the details of frame and glazing design to be able to utilize these tools.
WINDOW program is used to model glazing system and THERM program is used to
model frame and edge of glass sections. The whole product is then
assembled again in WINDOW program, so WINDOW has dual role. While WINDOW
program is easy to learn and can be accomplished in half a day, THERM program
requires 2-3 days of training for novice users. Several companies
offer training and our company (<A
href="http://www.designbuildersoftware.com">www.designbuildersoftware.com</A>)
is one of them. WINDOW program creates DOE2 report file, which can be used
with DOE 2.2 to assign windows. That provides the most accurate way to
model windows energy performance in a building.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=328230613-25042007><FONT face=Arial
color=#0000ff></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=328230613-25042007><FONT face=Arial
color=#0000ff>If you don't have all of the details and wish to get estimated
performance, you can use one of the predefined windows in DOE 2.2, closest to
what you have. You should not use simplified way (i.e., by assigning
simple U-factor, SHGC and VT as single number), because that produces gross
errors. EnergyPlus program, which is newer generation energy
simulation engine from DOE does not even have an option to specify windows and
doors that way. You have to have WINDOW EnergyPlus report file (equivalent
to DOE2 report file) or use one of predefined windows in EnergyPlus. Our
tool DesignBuilder uses EnergyPlus simulation engine, so you can try it
out.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=328230613-25042007><FONT face=Arial
color=#0000ff></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=328230613-25042007><FONT face=Arial
color=#0000ff>If you have further questions, you can contact us
directly.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=328230613-25042007><FONT face=Arial
color=#0000ff></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=328230613-25042007><FONT face=Arial
color=#0000ff>Regards,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=328230613-25042007><FONT face=Arial
color=#0000ff>Charlie Curcija</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=328230613-25042007></SPAN> </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>Kevin J. Kyte<BR><B>Sent:</B>
Tuesday, April 24, 2007 11:05 AM<BR><B>To:</B>
BLDG-SIM@gard.com<BR><B>Subject:</B> [BLDG-SIM] Simplied windows and glass
libraries<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><SPAN class=EmailStyle19><FONT face=Arial color=navy
size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt">Can
anyone offer advice on the most accurate route to model window
performance?<o:p></o:p></SPAN></FONT></SPAN></P>
<P class=MsoNormal><SPAN class=EmailStyle19><FONT face=Arial color=navy
size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt">There
are discrepancies between modeling glazing from doe library and then modeling
those values in simplified mode.<o:p></o:p></SPAN></FONT></SPAN></P>
<P class=MsoNormal><SPAN class=EmailStyle19><FONT face=Arial color=navy
size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt">Is this
steady state vs. transient heat transfer?<SPAN style="mso-spacerun: yes">
</SPAN>I am not familiar and I could use a lesson in
thermo.<o:p></o:p></SPAN></FONT></SPAN></P>
<P class=MsoNormal><SPAN class=EmailStyle19><FONT face=Arial color=navy
size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt">Is this
discussed in the Engineer’s Manual?<SPAN style="mso-spacerun: yes">
</SPAN>How about if I used Window5? Will I be able to import Window files into
Doe2.2?<o:p></o:p></SPAN></FONT></SPAN></P>
<P class=MsoNormal><SPAN class=EmailStyle19><FONT face=Arial color=navy
size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"><![if !supportEmptyParas]><![endif]> <o:p></o:p></SPAN></FONT></SPAN></P>
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size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"><![if !supportEmptyParas]><![endif]> <o:p></o:p></SPAN></FONT></SPAN></P>
<P class=MsoNormal><SPAN class=EmailStyle19><FONT face=Arial color=navy
size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"><![if !supportEmptyParas]><![endif]> <o:p></o:p></SPAN></FONT></SPAN></P>
<P class=MsoNormal><SPAN class=EmailStyle19><FONT face=Arial color=navy
size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt">I would
be grateful of any assistance.<o:p></o:p></SPAN></FONT></SPAN></P>
<P class=MsoNormal><SPAN class=EmailStyle19><FONT face=Arial color=navy
size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"><![if !supportEmptyParas]><![endif]> <o:p></o:p></SPAN></FONT></SPAN></P>
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class=EmailStyle19><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt">Kevin</SPAN></FONT></SPAN><FONT
color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; mso-bidi-font-size: 12.0pt; mso-color-alt: windowtext"><o:p></o:p></SPAN></FONT></P>
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