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<DIV dir=ltr><FONT face=Arial color=#000000 size=2>This is kind of an easy
answer, but here is what the eQuest help file says for how they calculate the
perimeter floor insulation:</FONT></DIV>
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<H1>Ground Floor - Exterior/Cavity Insulation</H1>
<P class=MsoNormal>Usage Notes:</P>
<P class=MsoNormal>LBNL and CEC published sources describe approximations for
using DOE-2 to model the two-dimensional slab-edge loss effects for a total of
twenty-two perimeter insulation configurations. Each of these are represented
under <B><SPAN style="COLOR: navy">Exterior/Cavity Insulation</SPAN></B><SPAN
style="COLOR: navy"> </SPAN>when the<SPAN style="COLOR: navy"> Ground Floor
Exposure</SPAN> is "Earth Contact".</P>
<P class=MsoNormal>Other insulation options are available when the <SPAN
style="COLOR: navy">Ground Floor Exposure</SPAN> is not "Earth Contact". These
options represent a wide variety of insulating techniques dependent on the
selected <SPAN style="COLOR: navy">Ground Floor Construction</SPAN><B>
</B>type.</P>
<P class=MsoNormal>Changing the <SPAN style="COLOR: navy">Ground Floor
Construction</SPAN> will cause this input to reset to the default for the new
<SPAN style="COLOR: navy">Ground Floor Construction</SPAN>. </P>
<P class=TipNoteHeading>DOE-2 Notes: </P>
<P class=MsoNormal>For earth contact constructions, <B><SPAN
style="COLOR: navy">Perimeter Floor Insulation</SPAN></B> material selected
here, if any, is represented in DOE-2 as a fictitious layer of insulation,
placed below the floor slab, whose R-value is calculated to yield a composite
total floor area UA product equal to a modified F<SUB>2</SUB>*perimeter length
product, determined by LBNL research using detailed two-dimensional finite
difference simulations. </P>
<P class=MsoNormal>For all other floor constructions, the <B><SPAN
style="COLOR: navy">Exterior/Cavity Insulation</SPAN></B> material selected
here, if any, is written to the exterior wall <B><SPAN
style="TEXT-TRANSFORM: uppercase; COLOR: gray">Layers</SPAN></B> command. Batt
insulations are treated as R-value materials. For furred applications, no
distinction is made between batt and board insulation, i.e., only insulation
R-values are listed. In either case, only an R-value is written to the DOE-2
file, adjusted for thermal bridging effects. Thermal bridging is assumed in all
cases for exterior wall <B><SPAN style="COLOR: navy">Exterior/Cavity
Insulation</SPAN></B>, since each is assumed to be applied between wall framing
or furring members.</P>
<P class=MsoNormal> </P>
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<FONT face=Tahoma size=2><B>From:</B> BLDG-SIM@gard.com on behalf of Steve
Mignogna<BR><B>Sent:</B> Mon 3/5/2007 2:37 PM<BR><B>To:</B>
BLDG-SIM@gard.com<BR><B>Subject:</B> [BLDG-SIM] 90.1-2004 ASHRAE
Basecase<BR></FONT><BR></DIV>
<DIV>Hello,<BR><BR>I had a question regarding setting up a baseline model based
on the ASHRAE 90.1-2004 standard. For the envelope requirements, the
required values for the "Slab on Grade Flrs" and "Below Grade Walls" are in
terms of "F-values" and "C-values" respectively. Since eQuest only takes
the U or R values as inputs, I was wondering how these F and C values
corresponded to them. Any help would be greatly appreciated.
<BR><BR>Regards,<BR clear=all><BR>-- <BR>Steve Mignogna<BR>Atelier Ten
</DIV><PRE>
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