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<div class=Section1>

<p class=MsoNormal><span style='color:#1F497D'>Hey Seth:<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>Check with the title 24 folk in
CA.  I believe they  have/had tables and <a
href="http://www.buildex.com/smartwall/tables/tpocmw.html">http://www.buildex.com/smartwall/tables/tpocmw.html</a>
buildex has some tables showing differing constructions HC.<o:p></o:p></span></p>

<div>

<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>Andy Hoover<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>Principal<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>The BEST Consultant, Inc.<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>Cell: 678-793-1159<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>Office: 678-200-7648<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>Fax: 678-827-0574<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>Email:
andyhoover@thebestconsultant.com<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>Web: www.thebestconsultant.com<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Times New Roman","serif";
font-variant:small-caps;color:#1F497D'>LEGAL DISCLAIMER<br>
The information transmitted is intended solely for the individual or entity to
which it is addressed and may contain confidential and/or privileged material.
Any review, retransmission, dissemination or other use of or taking action in
reliance upon this information by persons or entities other than the intended recipient
is prohibited. If you have received this email in error please contact the
sender and delete the material from any computer.</span><span style='font-size:
9.0pt;font-variant:small-caps;color:#1F497D'><o:p></o:p></span></p>

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<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>

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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"'> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Seth P.
Spangler<br>
<b>Sent:</b> Wednesday, March 24, 2010 9:44 AM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Bldg-sim] ASHRAE 90.1 "HC" heat capacity<o:p></o:p></span></p>

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<p class=MsoNormal><o:p> </o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hello,<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>ASHRAE
defines a mass wall as a wall having a heat capacity (HC) of greater than 7
BTU/ft<sup>2</sup> * F but I have been unable to find this property listed in
tables of building materials. I am trying to calculate the heat capacity of a
CMU wall and would like to confirm that my calculation methodology is correct.<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Per
ASHRAE 1997 Fundamentals:<o:p></o:p></span></p>

<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='font-size:10.0pt;font-family:Symbol'><span style='mso-list:Ignore'>·<span
style='font:7.0pt "Times New Roman"'>        
</span></span></span><![endif]><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>8”
concrete block – two cores filled with concrete (normal weight) – ~130 lb/ft<sup>3</sup><o:p></o:p></span></p>

<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='font-size:10.0pt;font-family:Symbol'><span style='mso-list:Ignore'>·<span
style='font:7.0pt "Times New Roman"'>        
</span></span></span><![endif]><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thickness
.67 ft<o:p></o:p></span></p>

<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='font-size:10.0pt;font-family:Symbol'><span style='mso-list:Ignore'>·<span
style='font:7.0pt "Times New Roman"'>        
</span></span></span><![endif]><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Specific
Heat ~ 0.22 BTU/lb * F<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Therefore
NC =(130 lb/ft<sup>3</sup> )*(.67 ft)*(0.22 BTU/lb * F)<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>NC=19.16<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Using
this methodology even a 4” brick wall has a HC greater than 7 (7.5 to be
exact).<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks
in advance.<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Georgia","serif"'>Seth
Spangler, LEED® AP <o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Georgia","serif"'>Project Engineer<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Georgia","serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Georgia","serif"'>RMF
Engineering, Inc <o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Georgia","serif"'>Ph:
(843) 971-9639 ext:1497</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Georgia","serif"'>Fax:
(843) 971-9641 <o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Georgia","serif"'>sspangle@rmf.com</span><o:p></o:p></p>

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