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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hello Morteza,<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'>Here is a catalog of tested wall masonry assemblies, you may be able to find most of your assembly in it. I do not guarantee the accuracy of the data nor the testing procedures used to obtain it as you will see they did not mention the use of any ASTMs. However, it may be helpful calibration data if you need to build an isothermal or 2-D model of your wall assembly. <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'>Also ASHRAE 90.1-2007 Section A9 lists the procedures to determine assemblies that are not listed in the tables of Appendix A. Reading between the lines a little you can calculate the R-Value for each layer using the appropriate calculation method for that type of wall. For example you can use the test data for the exterior CMU wall layers and do a parallel path calculation for the continuous insulation and cavity layers, sum the results for the assembly R-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'>Hope that helps,<o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Byron D. Burns, EIT, BEMP</span></b><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D'> <br></span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#666666'>Energy Analyst/ Modeler</span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D'> <br><br><b>H&A Architects & Engineers</b> | <a href="http://www.ha-inc.com"><span style='color:#006C67'>www.ha-inc.com</span></a> <br><br><br></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><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>Morteza Kasmai<br><b>Sent:</b> Friday, August 23, 2013 2:09 PM<br><b>To:</b> equest-users@lists.onebuilding.org<br><b>Subject:</b> [Equest-users] U-factor for existing masonry wall<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto'><span style='font-family:"Arial","sans-serif";color:#274E13'>Helow all,</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto'><span style='font-family:"Arial","sans-serif";color:#274E13'>In this LEED-CS project, the existing masonry wall was changed to the following configuration (from outside to inside):</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto'><span style='font-family:"Arial","sans-serif";color:#274E13'> - glass-fiber-reinforced concrete panels [TAKTL] on galvanized steel furring channels</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto'><span style='font-family:"Arial","sans-serif";color:#274E13'>- existing 8" masonry wall</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto'><span style='font-family:"Arial","sans-serif";color:#274E13'>- 3" polyisocyanurate insulation (R-18)</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto'><span style='font-family:"Arial","sans-serif";color:#274E13'>- 1/2" air space</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto'><span style='font-family:"Arial","sans-serif";color:#274E13'>- 3-5/8" metal studs without thermal insulation</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto'><span style='font-family:"Arial","sans-serif";color:#274E13'>- 5/8" gypsum wall board</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto'><span style='font-family:"Arial","sans-serif";color:#274E13'>Per ASHRAE 1.4 Tables “Opaque Building Envelope Constructions” requirnment, proposed construction assembly U-factor should be as-designed and consistent with Appendix A of ASHRAE 90.1. I cant fined any table in Appendix A to match this configuration. How should I select the U-factor for this wall?</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto'><span style='font-family:"Arial","sans-serif";color:#274E13'>Thank you so much for your help,</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto'><span style='font-family:"Arial","sans-serif";color:#274E13'>Morteza</span><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal><br clear=all><o:p></o:p></p><div><div><p class=MsoNormal><img border=0 id="_x0000_i1025" src="https://lh6.googleusercontent.com/Uuukta80GuFfvKouzA0mdSvUXqml7MtSwSiw-evuGMU=w147-h43-p-no"><o:p></o:p></p><div><div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></div></div></div></div></body></html>