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<p class=MsoNormal><span style='color:#1F497D'>Hello Thomas,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>I don’t think you can make a
construction where all the layers are R-value inputs. For a construction to
have layers the program must be able to calculate some mass for the wall. If
you want to specify only the thermal resistance of the wall choose “u-value
input” when you create a new construction and put in the overall u-value for
the wall assembly.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
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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>Thomas
Vu<br>
<b>Sent:</b> Tuesday, June 01, 2010 7:38 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] BDL Error<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>All,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I get the following BDL error in my model<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>WALL has no heat capacity. U-Value used.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I am modeling the baseline envelope as prescribed in
Appendix G of 90.1-2004. Referring to Appendix A of 90.1-2004 to model
the baseline envelope, I created layers for the wall construction seen in
the attached screenshot. The resulting U-value for the wall is
0.124. Can I not model a wall in this manner? It seems specifying
the U-value alone in the construction layer would do the same thing.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><b><span style='color:#0F243E'>Thomas Vu, E.I.<o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='color:#0F243E'>Graduate Student<o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='color:#0F243E'>Dept. of Mechanical and
Aerospace Engineering<o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='color:#0F243E'>University of Florida<o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='color:#0F243E'>vietdrum@ufl.edu<o:p></o:p></span></b></p>
<p class=MsoNormal><o:p> </o:p></p>
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