<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">

<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 12 (filtered medium)">
<!--[if !mso]>
<style>
v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style>
<![endif]-->
<style>
<!--
 /* Font Definitions */
 @font-face
        {font-family:Calibri;
        panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
        {font-family:Tahoma;
        panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
        {font-family:"Arial Narrow";
        panose-1:2 11 6 6 2 2 2 3 2 4;}
 /* Style Definitions */
 p.MsoNormal, li.MsoNormal, div.MsoNormal
        {margin:0in;
        margin-bottom:.0001pt;
        font-size:11.0pt;
        font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
        {mso-style-priority:99;
        color:blue;
        text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
        {mso-style-priority:99;
        color:purple;
        text-decoration:underline;}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
        {mso-style-priority:99;
        mso-style-link:"Balloon Text Char";
        margin:0in;
        margin-bottom:.0001pt;
        font-size:8.0pt;
        font-family:"Tahoma","sans-serif";}
span.EmailStyle17
        {mso-style-type:personal-compose;
        font-family:"Calibri","sans-serif";
        color:windowtext;}
span.BalloonTextChar
        {mso-style-name:"Balloon Text Char";
        mso-style-priority:99;
        mso-style-link:"Balloon Text";
        font-family:"Tahoma","sans-serif";}
.MsoChpDefault
        {mso-style-type:export-only;}
@page Section1
        {size:8.5in 11.0in;
        margin:1.0in 1.0in 1.0in 1.0in;}
div.Section1
        {page:Section1;}
-->
</style>
<!--[if gte mso 9]><xml>
 <o:shapedefaults v:ext="edit" spidmax="2050" />
</xml><![endif]--><!--[if gte mso 9]><xml>
 <o:shapelayout v:ext="edit">
  <o:idmap v:ext="edit" data="1" />
 </o:shapelayout></xml><![endif]-->
</head>

<body lang=EN-US link=blue vlink=purple>

<div class=Section1>

<p class=MsoNormal>Are there standard practice recommendations for where to
place your wall for a simulation?  Knowing every wall has thickness, but
the simulation engines are generally just using no thickness walls with a
calculated U/R value, where should you define your walls for the
simulation?  Should they be defined at the exterior face of the wall, the
interior face or the center of the wall.  It seems the exterior face can
greatly increase the zone volume, thus incorrectly determining the energy
usage, but the interior face underestimates the exterior exposure of the
wall.  The center of wall seems a good compromise, but is difficult to
identify and draw.  <o:p></o:p></p>

<p class=MsoNormal><o:p> </o:p></p>

<p class=MsoNormal>For interior walls/zone delineation the same question
applies.  From an energy standpoint is it better to place the zone
boundary on the face of the higher load zone or the lower load zone or split
the difference?<o:p></o:p></p>

<p class=MsoNormal>Thanks for any advice or direction to standard practices.<o:p></o:p></p>

<p class=MsoNormal><o:p> </o:p></p>

<p class=MsoNormal><o:p> </o:p></p>

<table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 align=left
 style='border-collapse:collapse'>
 <tr style='height:97.65pt'>
  <td width=266 valign=top style='width:199.8pt;padding:0in 5.4pt 0in 5.4pt;
  height:97.65pt'>
  <p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
  mso-element:frame;mso-element-frame-hspace:2.25pt;mso-element-wrap:around;
  mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;
  mso-height-rule:exactly'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><img
  width=252 height=97 id="Picture_x0020_1"
  src="cid:image001.jpg@01CA32CD.93397060" alt="154683_logo_final"></span><span
  style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p>
  </td>
  <td width=372 valign=top style='width:279.0pt;padding:0in 5.4pt 0in 5.4pt;
  height:97.65pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:2.25pt;
  mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:
  column;mso-height-rule:exactly'><span style='font-size:10.0pt;font-family:
  "Arial","sans-serif"'><o:p> </o:p></span></p>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:2.25pt;
  mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:
  column;mso-height-rule:exactly'><b><span style='font-size:12.0pt;font-family:
  "Arial Narrow","sans-serif";color:#17365D'>Ryan Del Balso<o:p></o:p></span></b></p>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:2.25pt;
  mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:
  column;mso-height-rule:exactly'><b><span style='font-size:12.0pt;font-family:
  "Arial Narrow","sans-serif";color:#17365D'>Building Performance Engineer II<o:p></o:p></span></b></p>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:2.25pt;
  mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:
  column;mso-height-rule:exactly'><b><span style='font-size:12.0pt;font-family:
  "Arial Narrow","sans-serif";color:#17365D'>ryan@ambient-e.com<o:p></o:p></span></b></p>
  <p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Arial Narrow","sans-serif";
  color:#EEB500'>130 W. 5th Avenue, Denver, CO 80204 <o:p></o:p></span></b></p>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:2.25pt;
  mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:
  column;mso-height-rule:exactly'><b><span style='font-size:12.0pt;font-family:
  "Arial Narrow","sans-serif";color:#17365D'>t 303.278.1532x210 | f
  303.278.8533 |<o:p></o:p></span></b></p>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:2.25pt;
  mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:
  column;mso-height-rule:exactly'><b><span style='font-size:12.0pt;font-family:
  "Arial Narrow","sans-serif";color:#17365D'><a href="http://www.ambient-e.com/"><span
  style='color:#17365D'>ambient-e.com</span></a><o:p></o:p></span></b></p>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:2.25pt;
  mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:
  column;mso-height-rule:exactly'><b><span style='font-size:10.0pt;font-family:
  "Arial","sans-serif";color:black'><o:p> </o:p></span></b></p>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:2.25pt;
  mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:
  column;mso-height-rule:exactly'><b><span style='font-size:10.0pt;font-family:
  "Arial","sans-serif";color:black'><o:p> </o:p></span></b></p>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:2.25pt;
  mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:
  column;mso-height-rule:exactly'><b><span style='font-size:10.0pt;font-family:
  "Arial","sans-serif";color:black'><o:p> </o:p></span></b></p>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:2.25pt;
  mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:
  column;mso-height-rule:exactly'><span style='font-size:10.0pt;font-family:
  "Arial","sans-serif"'><o:p> </o:p></span></p>
  </td>
 </tr>
</table>

<p class=MsoNormal><o:p> </o:p></p>

<p class=MsoNormal><o:p> </o:p></p>

</div>

</body>

</html>