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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Peter,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Are you doing an Appendix G model? If so, I thought I’d remind you that, per Table G3.1, “manual fenestration shading devices such as blinds or shades shall
not be modeled.” If the integrated blinds are automatically controlled then they can be modeled.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I’m curious about the U-value changing (presumably improving – decreasing). Why would blinds change the U-value?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Bill<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><a href="mailto:wbishop@pathfinder-ea.com"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:blue;text-decoration:none"><img border="0" width="480" height="114" id="Picture_x0020_1" src="cid:image001.jpg@01CDE349.92708DA0" alt="Senior Energy Engineer 28Jun2012"></span></a><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Peter Baumstark<br>
<b>Sent:</b> Saturday, December 22, 2012 8:52 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Integrated Window Blinds in Dual Pane Windows<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Ok. . . I have a situation where I'm modeling a facility relative to ASHRAE 90.1 baseline. The customer is using dual pane, low-e windows, with integrated venetian blinds between the two
panes of glass. One pane is low-e and the other is clear. Air gap between the two (not Argon or anything like that).<br>
<br>
I use the LBNL Windows tool, with blinds set at 45 deg, and the blinds increase the window assembly U value and SHGC significantly.<br>
<br>
So for performance relative to 90.1, would it be acceptable to simply utilize the U & SHGC from with Windows tool? Are there any restrictions on the angle of the blinds, or whether the angle should be different for winter vs summer?<br>
<br>
I'd appreciate any guidance on how to best model this scenario.<br>
<br>
Thank you,<br>
Pete Baumstark<br>
San Jose, CA<o:p></o:p></span></p>
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