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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Kevin,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>One reference for calculating U-Factors
for wood-framed, metal-framed and masonry walls is the 2009 ASHRAE Handbook –
Fundamentals, Chapter 27. There is a section on “Two-dimensional U-factor
calculation”, which describes the parallel-path, isothermal-planes, zone
and modified zone methods of calculating overall heat transfer rates through
wall assemblies. Earlier versions of Fundamentals (2005, 2001 etc.) will also
have some background information.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Regards,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Bill<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><font size=2
color=black face="Franklin Gothic Medium Cond"><span style='font-size:10.0pt;
font-family:"Franklin Gothic Medium Cond";color:black;font-weight:bold;
mso-bidi-font-weight:normal;mso-no-proof:yes'>William Bishop, EIT, BEMP, LEED<sup>®</sup>
AP </span></font></b><b style='mso-bidi-font-weight:normal'><font size=2
color="#006600" face="Franklin Gothic Medium Cond"><span style='font-size:10.0pt;
font-family:"Franklin Gothic Medium Cond";color:#006600;font-weight:bold;
mso-bidi-font-weight:normal;mso-no-proof:yes'>|</span></font></b><b
style='mso-bidi-font-weight:normal'><font size=2 color=black
face="Franklin Gothic Medium Cond"><span style='font-size:10.0pt;font-family:
"Franklin Gothic Medium Cond";color:black;font-weight:bold;mso-bidi-font-weight:
normal;mso-no-proof:yes'> </span></font></b><b style='mso-bidi-font-weight:
normal'><font size=2 color=black face="Franklin Gothic Medium Cond"><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:"Franklin Gothic Medium Cond";
color:black;font-weight:bold;mso-bidi-font-weight:normal;mso-no-proof:yes'>Pathfinder
Engineers & Architects LLP</span></font></b><b><font size=2 color=black
face="Franklin Gothic Medium Cond"><span style='font-size:10.0pt;font-family:
"Franklin Gothic Medium Cond";color:black;font-weight:bold;mso-no-proof:yes'><o:p></o:p></span></font></b></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:black;mso-no-proof:yes'>Mechanical Engineer<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
5.0pt;font-family:Arial;color:black;mso-no-proof:yes'><o:p> </o:p></span></font></p>
<p class=MsoNormal><st1:address
style="BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x; BACKGROUND-POSITION: left bottom"
tabIndex="0" w:st="on"><st1:Street w:st="on"><font size=1 color=navy
face=Arial><span style='font-size:9.0pt;font-family:Arial;color:navy;
mso-no-proof:yes'>134 South Fitzhugh Street</span></font></st1:Street><font
size=1 color=navy><span style='font-size:9.0pt;color:navy;mso-no-proof:yes'><br>
</span></font><st1:City w:st="on"><font size=1 color=navy face=Arial><span
style='font-size:9.0pt;font-family:Arial;color:navy;mso-no-proof:yes'>Rochester</span></font></st1:City><font
size=1 color=navy face=Arial><span style='font-size:9.0pt;font-family:Arial;
color:navy;mso-no-proof:yes'>, <st1:State w:st="on">NY</st1:State> <st1:PostalCode
w:st="on">14608</st1:PostalCode></span></font></st1:address><font size=1
color=navy><span style='font-size:9.0pt;color:navy;mso-no-proof:yes'><br>
</span></font><font size=1 color=navy face=Arial><span style='font-size:9.0pt;
font-family:Arial;color:navy;mso-no-proof:yes'>T: (585) 325-6004 </span></font><font
size=1 color=black face=Arial><span style='font-size:9.0pt;font-family:Arial;
color:black;mso-no-proof:yes'>Ext. 114</span></font><font size=1 color=navy><span
style='font-size:9.0pt;color:navy;mso-no-proof:yes'><br>
</span></font><font size=1 color=navy face=Arial><span style='font-size:9.0pt;
font-family:Arial;color:navy;mso-no-proof:yes'>F: (585) 325-6005</span></font><font
size=1 color=black face=Arial><span style='font-size:9.0pt;mso-bidi-font-size:
12.0pt;font-family:Arial;color:black;mso-no-proof:yes'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:black;mso-no-proof:yes'>wbishop@pathfinder-ea.com<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
9.0pt;mso-bidi-font-size:12.0pt;font-family:Arial;color:black;mso-no-proof:
yes'>www.pathfinder-ea.com</span></font><font color=navy><span
style='color:navy;mso-no-proof:yes'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=5 color=green face=Webdings><span
style='font-size:18.0pt;font-family:Webdings;mso-bidi-font-family:Webdings;
color:green;mso-no-proof:yes'>P</span></font><font color=green><span
style='color:green;mso-no-proof:yes'> </span></font><font size=1 color=green><span
style='font-size:7.5pt;color:green;mso-no-proof:yes'>Sustainability –
less is more.</span></font><font color=green><span style='color:green'><o:p></o:p></span></font></p>
</div>
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face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Kevin Kyte<br>
<b><span style='font-weight:bold'>Sent:</span></b> Saturday, June 05, 2010
12:13 PM<br>
<b><span style='font-weight:bold'>To:</span></b> bldg-sim@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Bldg-sim] effective
R-value cavity insulation</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am curious what the relationship is between cavity depth,
rated insulation, and effective insulation in framed walls. I am
referencing the ASHRAE 90.1 doc because it is really the only one I have on this
subject. I have charted Table A9.2B and a logarithmic trendline appears
to be a good fit for extrapolating. If anyone in academia, industry, or
the societies has more information on this subject I would certainly be
grateful to receive a good lead. Thank you.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoAutoSig><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Kevin Kyte, </span></font><font size=2><span style='font-size:10.0pt'>LEED</span></font><sup><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> </span></font></sup><sup><font
size=2><span style='font-size:10.0pt'>®</span></font></sup><font size=2><span
style='font-size:10.0pt'> AP<o:p></o:p></span></font></p>
<p class=MsoNormal><st1:place w:st="on"><b><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-weight:bold'>Watts</span></font></b></st1:place><b><span
style='font-weight:bold'> Architecture & Engineering, P.C.<o:p></o:p></span></b></p>
<p class=MsoNormal><st1:Street w:st="on"><st1:address w:st="on"><font size=2
face=Shruti><span style='font-size:10.5pt;font-family:Shruti'>95 Perry
Street, Suite 300</span></font></st1:address></st1:Street><font size=2
face=Shruti><span style='font-size:10.5pt;font-family:Shruti'><o:p></o:p></span></font></p>
<p class=MsoNormal><st1:place w:st="on"><st1:City w:st="on"><font size=2
face=Shruti><span style='font-size:10.5pt;font-family:Shruti'>Buffalo</span></font></st1:City><font
size=2 face=Shruti><span style='font-size:10.5pt;font-family:Shruti'>, <st1:State
w:st="on">NY</st1:State> <st1:PostalCode w:st="on">14203</st1:PostalCode></span></font></st1:place><font
size=2 face=Shruti><span style='font-size:10.5pt;font-family:Shruti'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Shruti><span style='font-size:10.5pt;
font-family:Shruti'>p: 716.206.5174<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Shruti><span style='font-size:10.5pt;
font-family:Shruti'>f.: 716.206.5199<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
11.0pt'>e: <a href="mailto:kkyte@watts-ae.com">kkyte@watts-ae.com</a><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
11.0pt'><a href="http://www.watts-ae.com/">http://www.watts-ae.com</a><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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