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<TITLE>Re: [Equest-users] Modeling Windows: Center of Glass vs Assembly</TITLE>
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<FONT FACE="Arial"><SPAN STYLE='font-size:12pt'>Thanks, Carol. I have two problems with Window 5:<BR>
</SPAN></FONT><UL><LI><FONT FACE="Arial"><SPAN STYLE='font-size:12pt'>It can’t seem to handle complicated multi-pane geometries (though perhaps there’s a way to finesse that), and
</SPAN></FONT><LI><FONT FACE="Arial"><SPAN STYLE='font-size:12pt'>It makes as much sense to me as your average Lady Gaga music video<BR>
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After I work my way through the Fenestration chapter I plan to wade into Window 5.<BR>
<BR>
</SPAN></FONT><FONT COLOR="#1E487C"><FONT SIZE="2"><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'>Steve Samenski, PE, LEED AP, BEMP<BR>
Vice President - Sustainable Technologies<BR>
The Spinnaker Group, Inc.<BR>
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www.thespinnakergroupinc.com <<a href="http://www.thespinnakergroupinc.com">http://www.thespinnakergroupinc.com</a>> <</SPAN></FONT></FONT></FONT><FONT SIZE="2"><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'><FONT COLOR="#0000FE"><U><a href="http://www.thespinnakergroupinc.com">http://www.thespinnakergroupinc.com</a></U></FONT><FONT COLOR="#1E487C">> <BR>
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On 9/16/10 7:20 PM, "Carol Gardner" <<a href="cmg750@gmail.com">cmg750@gmail.com</a>> wrote:<BR>
<BR>
</SPAN></FONT><BLOCKQUOTE><FONT FACE="Arial"><SPAN STYLE='font-size:12pt'>Happy reading. I'm not sure exactly how eQUEST handles all of this but I would assume, oooh, dangerous, that if you put in your glass type carefully and take care to specify the width and type of frame you have, all of which are in the Wizards, you should be good. You could test the output by comparing it to a Win5 calculation of your COG U value and frame, or just import the Win5 data into the model.<BR>
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Carol<BR>
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On Thu, Sep 16, 2010 at 2:38 PM, STEVE SAMENSKI <<a href="steve@thespinnakergroupinc.com">steve@thespinnakergroupinc.com</a>> wrote:<BR>
</SPAN></FONT><BLOCKQUOTE><FONT FACE="Arial"><SPAN STYLE='font-size:12pt'>Does anyone know definitively if eQuest calculates window assembly U-values based on user input?<BR>
<BR>
As many have pointed out, the USGBC is now being careful about the distinction between center-of-glass U values and assembly U values. I’ve been entering center-of-glass U-values and precise window geometry, counting on eQuest to do the heavy lifting for me. Report LV-D says “U-VALUE INCLUDES OUTSIDE AIR FILM; WINDOW INCLUDES FRAME, IF DEFINED”. However, combing through several posts to this forum, some say eQuest doesn’t really calculate an assembly’s U-value, because it ignores the edge-of-glass effects due to the frame. (Not to be confused with the thermal conductance of the frame itself, which I’m sure eQuest uses in its calcs.) I’m hoping that one of the programmers can answer this, or maybe someone who got the story from a programmer.<BR>
<BR>
I plan to read the ASHRAE Fundamentals Chapter on Fenestration this weekend. Wish me luck.<BR>
</SPAN></FONT><FONT SIZE="1"><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:9pt'><BR>
</SPAN></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><FONT COLOR="#1F497D"><FONT SIZE="2"><SPAN STYLE='font-size:10pt'>Steve Samenski, PE, LEED AP, BEMP<BR>
Vice President - Sustainable Technologies<BR>
The Spinnaker Group, Inc.<BR>
<a href="http://equest-diary.livejournal.com/">http://equest-diary.livejournal.com/</a><BR>
www.thespinnakergroupinc.com <<a href="http://www.thespinnakergroupinc.com">http://www.thespinnakergroupinc.com</a>> <</SPAN></FONT></FONT><FONT SIZE="2"><SPAN STYLE='font-size:10pt'><FONT COLOR="#0000FF"><U><a href="http://www.thespinnakergroupinc.com">http://www.thespinnakergroupinc.com</a></U></FONT><FONT COLOR="#1F497D">> <BR>
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</SPAN></FONT></BLOCKQUOTE><FONT FACE="Arial"><SPAN STYLE='font-size:12pt'><BR>
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</SPAN></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><FONT COLOR="#1F497D"><FONT SIZE="2"><SPAN STYLE='font-size:10pt'>Steve Samenski, PE, LEED AP, BEMP<BR>
Vice President - Sustainable Technologies<BR>
The Spinnaker Group, Inc.<BR>
786-385-3510<BR>
www.thespinnakergroupinc.com <</SPAN></FONT></FONT><FONT SIZE="2"><SPAN STYLE='font-size:10pt'><FONT COLOR="#0000FF"><U><a href="http://www.thespinnakergroupinc.com">http://www.thespinnakergroupinc.com</a></U></FONT><FONT COLOR="#1F497D">> <BR>
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