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<DIV dir=ltr align=left><SPAN class=456574919-24112008><FONT face=Arial
color=#0000ff size=2>I live and work in Vancouver, BC, where frequent rainfall
and the occasional snowfall mean that green roofs have what one might call a
dynamic R-value. Imagine if you will that in the dead of winter during a
cold spell that follows a three week period of intense rain (common
scenario), the green roof is essentially a block of ice. Compare this with
a period of drought in the summer time where the moisture content of the green
roof is almost nil (assuming an extensive green roof, <6" soil). It
would be inappropriate to assign a static R-value for, say, 3" of soil of a
given moisture content, to accurately simulate its thermal properties over the
year.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=456574919-24112008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=456574919-24112008><FONT face=Arial
color=#0000ff size=2>As such, we typically do not model the thermal properties
of a green roof, only the R-value of the insulation below
it.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=456574919-24112008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=456574919-24112008><FONT face=Arial
color=#0000ff size=2>My understanding is that eQuest only deals with static
R-values. I do not know of any work arounds for modeling a dynamic
R-value.</FONT></SPAN></DIV>
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class=456574919-24112008><FONT face=Arial color=#0000ff
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<DIV style="FONT-SIZE: 9pt; FONT-FAMILY: Arial" align=left><B>Karine Le Du, EIT,
LEED AP</B><BR>Sustainable Building Analyst<BR>Stantec<BR></DIV>
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<DIV><SPAN
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lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: #008040; FONT-FAMILY: 'Arial Narrow'">Please
consider the environment before printing this
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<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>Eric
Kees<BR><B>Sent:</B> Monday, November 24, 2008 11:28 AM<BR><B>To:</B>
equest-users@lists.onebuilding.org<BR><B>Subject:</B> [Equest-users] Green
Roofs<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal>Does anyone know if equest is capable of modeling a green
roof, or if there is a work around for accurately modeling one?<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Eric L.
Kees </SPAN></B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">| Mechanical
Designer</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"><BR></SPAN><SPAN
style="FONT-SIZE: 7.5pt; FONT-FAMILY: 'Arial','sans-serif'"> <BR></SPAN><B><SPAN
style="FONT-SIZE: 14pt; COLOR: green; FONT-FAMILY: 'Garamond','serif'">DURRANT
</SPAN></B><I><SPAN
style="FONT-SIZE: 12pt; COLOR: green; FONT-FAMILY: 'Garamond','serif'">Celebrating
75 years in 2008!<BR></SPAN></I><SPAN
style="FONT-SIZE: 8pt; COLOR: gray; FONT-FAMILY: 'Arial','sans-serif'">400 Ice
Harbor Drive | Dubuque,
IA 52001<BR>T 563.583.9131 ext 24010 |
F 563.557.9078</SPAN><o:p></o:p></P>
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style="FONT-SIZE: 8pt; FONT-FAMILY: 'Arial','sans-serif'"><A
href="http://www.durrant.com"><B><SPAN
style="COLOR: green">www.durrant.com</SPAN></B></A><BR><BR></SPAN><SPAN
style="FONT-SIZE: 24pt; COLOR: green; FONT-FAMILY: Webdings">P</SPAN><SPAN
style="FONT-SIZE: 10pt; COLOR: green; FONT-FAMILY: 'Arial','sans-serif'">
</SPAN><SPAN
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