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<div class=Section1>

<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Bldg-Sim Group,<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=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Does anyone have energy performance data on Insulated
Concrete Forms (ICF), not SIPS, related to commercial buildings, especially in <st1:place
w:st="on">Northern US</st1:place> climates?  <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=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Including the effect of reduced infiltration for ICF over
standard construction (0.5 ACH vs. 0.25 ACH), I am seeing ~$1,000/yr savings
for going to an ~R-27 ICF from an ~R-20 2x6 cavity wall with 1” of
rigid.  The building is an ~35,000 SF assisted living facility with a
geothermal HVAC system.<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=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Modeling in EQUEST shows minimal annual energy savings and
peak load reduction; it seems mainly related to increase R-value and not
increased thermal mass.  Off hand, I was under the impression that EQUEST
uses ASHRAE transfer functions that account for the thermal mass of the wall if
you select “layers input”. Could someone confirm/deny this?<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=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Some of my thoughts:<o:p></o:p></span></font></p>

<p class=MsoNormal style='margin-left:.5in;text-indent:-.25in;mso-list:l2 level1 lfo3'><![if !supportLists]><font
size=2 face="Times New Roman"><span style='font-size:10.0pt'><span
style='mso-list:Ignore'>-<font size=1 face="Times New Roman"><span
style='font:7.0pt "Times New Roman"'>         
</span></font></span></span></font><![endif]><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>I think the daily temperature swings
are generally less in a northern climate many days out of the year and the
building operates 24/7, therefore the deltaT from inside to outside is
low.  <o:p></o:p></span></font></p>

<p class=MsoNormal style='margin-left:.5in;text-indent:-.25in;mso-list:l2 level1 lfo3'><![if !supportLists]><font
size=2 face="Times New Roman"><span style='font-size:10.0pt'><span
style='mso-list:Ignore'>-<font size=1 face="Times New Roman"><span
style='font:7.0pt "Times New Roman"'>         
</span></font></span></span></font><![endif]><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Likewise, putting insulation between
the space and the mass in the wall will slow heat transfer and lower the deltaT
as opposed to using passive solar mass/Thomb Walls which the mass is in the
space.<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=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks in advance for any comments,<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 style='margin:0in;margin-bottom:.0001pt'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>Jon Evans, PE, LEED AP<o:p></o:p></span></font></p>

<p style='margin:0in;margin-bottom:.0001pt'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>

<p style='margin:0in;margin-bottom:.0001pt'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>Sustainable Engineering Group LLC</span></font><o:p></o:p></p>

<p style='margin:0in;margin-bottom:.0001pt'><st1:Street w:st="on"><st1:address
 w:st="on"><font size=2 face="Times New Roman"><span style='font-size:10.0pt'>431
  Charmany Drive Suite 102</span></font></st1:address></st1:Street><font
size=2><span style='font-size:10.0pt'><o:p></o:p></span></font></p>

<p style='margin:0in;margin-bottom:.0001pt'><st1:place w:st="on"><st1:City
 w:st="on"><font size=2 face="Times New Roman"><span style='font-size:10.0pt'>Madison</span></font></st1:City><font
 size=2><span style='font-size:10.0pt'>, <st1:State w:st="on">WI</st1:State> <st1:PostalCode
 w:st="on">53719</st1:PostalCode></span></font></st1:place><font size=2><span
style='font-size:10.0pt'><o:p></o:p></span></font></p>

<p style='margin:0in;margin-bottom:.0001pt'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>

<p style='margin:0in;margin-bottom:.0001pt'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>Tel: (608) 231 9664 x 13<o:p></o:p></span></font></p>

<p style='margin:0in;margin-bottom:.0001pt'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>Fax: (608) 231 9665<o:p></o:p></span></font></p>

<p style='margin:0in;margin-bottom:.0001pt'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>E-mail: jevans@sustaineng.com<o:p></o:p></span></font></p>

<p style='margin:0in;margin-bottom:.0001pt'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>Web: </span></font><a href="www.sustaineng.com"><font
size=2><span style='font-size:10.0pt'>www.sustaineng.com</span></font></a><o:p></o:p></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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