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<DIV dir=ltr align=left><SPAN class=122452619-11082009><FONT face=Arial
color=#0000ff size=2>Vikram,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=122452619-11082009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=122452619-11082009> <FONT
face=Arial color=#0000ff size=2>There have been some thoughtgul answers
regarding U-values unique to zones. As I recall from ASHRAE practices,
slab heat transfer is related more closely to some "F" factor (relating to the
perimeter) than to a U-factor.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=122452619-11082009> <FONT
face=Arial color=#0000ff size=2>Look at your dark blue cross pattern in the left
foreground. This seems to correspond to a zone (a hallway?), but not to
proximity or distance to the edge-of-slab. Therefore, I am guessing (and
this is only a guess) that eQuest is not trying to establish different U-values
for these different color regions, but that eQuest is merely assigning a floor
segment to each zone for calculation purposes. In other words, this does
not seem consistent with giving emphasis to the slab's perimeter for
heat-transfer calculations.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=122452619-11082009> <FONT
face=Arial color=#0000ff size=2>However, please tell me this: If my guess
is correct, should I have been assigning external walls and roofs to each
individual zone's external surfaces rather than to a floor's external
surfaces?</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=122452619-11082009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=122452619-11082009><FONT face=Arial
color=#0000ff size=2>Lars Fetzek, EI</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=122452619-11082009><FONT face=Arial
color=#0000ff size=2>Phoenix Engineering Group</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=122452619-11082009><FONT face=Arial
color=#0000ff size=2>Tampa, Florida</FONT></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Vikram
Sami<BR><B>Sent:</B> Tuesday, August 11, 2009 2:38 PM<BR><B>To:</B>
equest-users@lists.onebuilding.org<BR><B>Subject:</B> [Equest-users] Underfloor
Patchwork<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal>This is a question that I’ve wondered about for a while. When
you come out of the wizard, an UF material is created for each zone(like below),
with different properties for each zone – with an amazing variation in
properties across the board. Does anyone know why? Is it reasonable to assign
one material to all of them (assuming they are the same construction and sitting
on the same soil), and if so, how do I know which material to pick out of the
20+ construction assemblies created? <o:p></o:p></P>
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