Dramatically higher or lower?<br><br><div class="gmail_quote">On Thu, Sep 16, 2010 at 9:35 PM, mark dewsbury <span dir="ltr"><<a href="mailto:Mark.Dewsbury@utas.edu.au">Mark.Dewsbury@utas.edu.au</a>></span> wrote:<br>
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<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">Dear Kevin,</span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">I am sure this is going to be a hot topic
very soon. </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">In Australia, the ASHRAE & other values
have been used for some years with regard to cavity insulation values. This
includes subfloors, walls, roof spaces and spaces between roofing and sarking. We
have conducted a few preliminary studies with Engineering honours and Architecture
PhD students on actual buildings. They have all shown dramatically different results
to what was previously accepted. In the case of walls this has a dramatic
affect on the current practice of placing the insulation on the outside of the
cavity. </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">In terms of the roof model we have
documented variations up to 20 deg C between DSP and observed results. Subfloors
having variations but to a lessor magnitude. </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">We are hoping for some future moneys to go
back to the fundamentals of the physics models and modify them to relate to
what is really occurring in buildings. We have measured amazing horizontal and
vertical air currents in cavity spaces dependent on wall orientation. </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
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<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">Mark Dewsbury<br>
<br>
Centre for Sustainable Architecture with Wood<br>
School
of Architecture<br>
University
of Tasmania<br>
Locked Bag 1324<br>
Launceston 7250<br>
ph: 03 6324 4089<br>
mob: 0417 290 807<br>
fax: 03 6324 4088<br>
</span></font><font color="navy"><span style="color: navy;">e: <a href="mailto:mark.dewsbury@utas.edu.au" title="blocked::mailto:mark.dewsbury@utas.edu.au" target="_blank">mark.dewsbury@utas.edu.au</a></span></font></p>
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<p class="MsoNormal"><b><font size="2" face="Tahoma"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;" lang="EN-US">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size: 10pt; font-family: Tahoma;" lang="EN-US">
Kevin Kyte [mailto:<a href="mailto:KKyte@watts-ae.com" target="_blank">KKyte@watts-ae.com</a>] <br>
<b><span style="font-weight: bold;">Sent:</span></b> Friday, 10 September 2010
1:47 AM<br>
<b><span style="font-weight: bold;">To:</span></b> mark dewsbury<br>
<b><span style="font-weight: bold;">Subject:</span></b> RE: [Bldg-sim] effective
R-value cavity insulation</span></font><span lang="EN-US"></span></p>
</div>
<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size: 11pt; font-family: Calibri; color: rgb(31, 73, 125);" lang="EN-US">This is what I
received.</span></font></p>
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<p class="MsoNormal"><b><font size="2" face="Tahoma"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;" lang="EN-US">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size: 10pt; font-family: Tahoma;" lang="EN-US">
mark dewsbury [mailto:<a href="mailto:Mark.Dewsbury@utas.edu.au" target="_blank">Mark.Dewsbury@utas.edu.au</a>] <br>
<b><span style="font-weight: bold;">Sent:</span></b> Sunday, September 05, 2010
9:36 PM<br>
<b><span style="font-weight: bold;">To:</span></b> Kevin Kyte<br>
<b><span style="font-weight: bold;">Subject:</span></b> FW: [Bldg-sim] effective
R-value cavity insulation</span></font></p>
</div>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12pt;" lang="EN-US"> </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">Dear Kevin,</span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">Was there any feedback or comment from
your question? </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">I have done some preliminary studies with
engineering honours students and found dramatically different results to the
theories. </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<div>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">Mark Dewsbury<br>
<br>
Centre for Sustainable Architecture with Wood<br>
School of Architecture<br>
University
of Tasmania<br>
Locked Bag 1324<br>
Launceston 7250<br>
ph: 03 6324 4089<br>
mob: 0417 290 807<br>
fax: 03 6324 4088<br>
</span></font><font color="navy"><span style="color: navy;">e: <a href="mailto:mark.dewsbury@utas.edu.au" title="blocked::mailto:mark.dewsbury@utas.edu.au" target="_blank">mark.dewsbury@utas.edu.au</a></span></font></p>
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<p class="MsoNormal"><b><font size="2" face="Tahoma"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;" lang="EN-US">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size: 10pt; font-family: Tahoma;" lang="EN-US">
Kevin Kyte [mailto:<a href="mailto:KKyte@watts-ae.com" target="_blank">KKyte@watts-ae.com</a>] <br>
<b><span style="font-weight: bold;">Sent:</span></b> Sunday, 6 June 2010 2:13 AM<br>
<b><span style="font-weight: bold;">To:</span></b> <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br>
<b><span style="font-weight: bold;">Subject:</span></b> [Bldg-sim] effective
R-value cavity insulation</span></font><span lang="EN-US"></span></p>
</div>
<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;" lang="EN-US">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.</span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;" lang="EN-US"> </span></font></p>
<p><font size="3" face="Times New Roman"><span style="font-size: 12pt;" lang="EN-US">Kevin Kyte, </span></font><font size="2"><span style="font-size: 10pt;" lang="EN-US">LEED</span></font><sup><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;" lang="EN-US"> </span></font></sup><sup><font size="2"><span style="font-size: 10pt;" lang="EN-US">®</span></font></sup><font size="2"><span style="font-size: 10pt;" lang="EN-US"> AP</span></font></p>
<p class="MsoNormal"><b><font size="3" face="Times New Roman"><span style="font-size: 12pt; font-weight: bold;" lang="EN-US">Watts</span></font></b><b><span style="font-weight: bold;" lang="EN-US"> Architecture & Engineering, P.C.</span></b></p>
<p class="MsoNormal"><font size="2" face="Shruti"><span style="font-size: 10.5pt; font-family: Shruti;" lang="EN-US">95
Perry Street, Suite 300</span></font><font size="2" face="Shruti"><span style="font-size: 10.5pt; font-family: Shruti;" lang="EN-US"></span></font></p>
<p class="MsoNormal"><font size="2" face="Shruti"><span style="font-size: 10.5pt; font-family: Shruti;" lang="EN-US">Buffalo</span></font><font size="2" face="Shruti"><span style="font-size: 10.5pt; font-family: Shruti;" lang="EN-US">,
NY 14203</span></font><font size="2" face="Shruti"><span style="font-size: 10.5pt; font-family: Shruti;" lang="EN-US"></span></font></p>
<p class="MsoNormal"><font size="2" face="Shruti"><span style="font-size: 10.5pt; font-family: Shruti;" lang="EN-US">p: 716.206.5174</span></font></p>
<p class="MsoNormal"><font size="2" face="Shruti"><span style="font-size: 10.5pt; font-family: Shruti;" lang="EN-US">f.: 716.206.5199</span></font></p>
<p class="MsoNormal"><font size="2" face="Times New Roman"><span style="font-size: 11pt;" lang="EN-US">e: <a href="mailto:kkyte@watts-ae.com" target="_blank">kkyte@watts-ae.com</a></span></font></p>
<p class="MsoNormal"><font size="2" face="Times New Roman"><span style="font-size: 11pt;" lang="EN-US"><a href="http://www.watts-ae.com/" target="_blank">http://www.watts-ae.com</a></span></font></p>
<p class="MsoNormal"><font size="2" face="Times New Roman"><span style="font-size: 11pt;" lang="EN-US"> </span></font></p>
<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12pt;" lang="EN-US"> </span></font></p>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Carol Gardner PE<br>
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