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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>According to Ashrae 90.1 (either 2007 or 2010) the fenestration must be labeled or in case of site built fenestration the installer or supplier must provide a certification listing the fenestration properties (see art 5.8.2). These are data that must be provided to the mechanical designer for performing the load calculations even before the modeling process; you can force either the Architect that is specifying the fenestration or the GC to provide the data otherwise they are not in compliance with Ashrae energy standard and so not meeting the LEED energy pre-requisite.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>It seems to me that using the window program or other mean to find the assembly performance is a burden that should not be on the mechanical designer or energy modeler.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>If you are lucky that the Architect has specified YKK AP products you can find on the YKK AP website “My Thermal Assistant” that calculates their products assembly U-factor, SHGC and VT per NFRC 100 and NFRC 200 in fast simple steps.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><img width=683 height=570 id="Picture_x0020_1" src="cid:image002.png@01CF4F14.D5338F60"><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Roberto Bisti E.I.<o:p></o:p></p><p class=MsoNormal>Consultant Engineering Service, Inc.<o:p></o:p></p><p class=MsoNormal>811 W. 5th street, Suite 101<o:p></o:p></p><p class=MsoNormal>Winston-Salem, NC 27101<o:p></o:p></p><p class=MsoNormal>Ph 336.724.0139 x 103<o:p></o:p></p><p class=MsoNormal>Fax 336.724.1812<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>