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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>The Wall Properties Input Screen calculates the overall R and U values for a sandwich assembly however it doesn’t have any way to factor in the “framing effect” of wall studs which can have a significant effect on average wall assembly R and U values.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>When I queried Carrier, part of Craig’s reply was for cooling design loads and energy modeling, “…U-value is not important, what is important is making sure the specific heat, density and weight of the composite insulation/stud layer is correct. Those values are used in the TFM equations not U-value.” <o:p></o:p></p><p class=MsoNormal><b><o:p> </o:p></b></p><p class=MsoNormal>Since this isn’t as simple as inputting an overall U-Value from ASHRAE, Has anyone come up with a way to effectively model steel stud framing that would pass a DOE review?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thank you,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:black'>Michael L. Hardy, PE, F.NSPE</span> <br><span style='font-family:"Tahoma","sans-serif"'>Black Oak Engineering, Inc.<br></span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'>Cell 503.314.5244</span> <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>