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<DIV><SPAN class=839394518-19052004><FONT face=Arial color=#0000ff
size=2>Varkie,</FONT></SPAN></DIV>
<DIV><SPAN class=839394518-19052004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=839394518-19052004><FONT face=Arial color=#0000ff size=2>If you
review Addendum E of ASHRAE 90.1-2001 (available as free download from ASHRAE
website) it addresses these issues you are asking. While LEED has not
officially adopted this addendum as a simulation methodology it is my
understanding that that is why it was developed. If you follow the
approach outlined in this document I don't think USGBC will take issue with your
simulation. Please don't quote me on that, I am certainly not trying
to speak for USGBC. </FONT></SPAN></DIV>
<DIV><SPAN class=839394518-19052004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=839394518-19052004><FONT face=Arial color=#0000ff size=2>I have
used the methodology several times and it provides clear guidance on how to
create the baseline model and the proposed building model. Most
importantly you can easily document your modeling assumptions so that when
questioned you can reference the methodology.</FONT></SPAN></DIV>
<DIV><SPAN class=839394518-19052004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=839394518-19052004><FONT face=Arial color=#0000ff size=2>Good
Luck,</FONT></SPAN></DIV>
<DIV><SPAN class=839394518-19052004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=839394518-19052004><FONT face=Arial color=#0000ff size=2>Mike
</FONT></SPAN></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV align=left><B><SPAN lang=en-us><FONT size=2>Michael Tillou, PE<SPAN
class=839394518-19052004> </SPAN></FONT></SPAN></B></DIV>
<DIV align=left><B><SPAN lang=en-us><SPAN class=839394518-19052004></SPAN><SPAN
class=839394518-19052004></SPAN><FONT size=2>L<SPAN class=839394518-19052004>EED
AP</SPAN></FONT><BR></SPAN><SPAN lang=en-us><FONT size=2>etc Group,
Inc.</FONT></SPAN><SPAN lang=en-us><BR></SPAN><SPAN lang=en-us><FONT size=2>PO
Box 749, North Adams, MA 01</FONT></SPAN></B><SPAN lang=en-us></SPAN><B><SPAN
lang=en-us><FONT size=2>247</FONT></SPAN><SPAN lang=en-us><BR><FONT size=2>ph.
(413) 458-9870 </FONT></SPAN></B><SPAN lang=en-us></SPAN><FONT
size=2><B><SPAN lang=en-us> </SPAN><SPAN lang=en-us>fx.</SPAN></B><SPAN
lang=en-us></SPAN><B><SPAN lang=en-us> (</SPAN></B><SPAN
lang=en-us></SPAN></FONT><B><SPAN lang=en-us><FONT size=2>801)
278-1927</FONT></SPAN><SPAN lang=en-us><FONT color=#000080><BR><FONT
size=2><FONT color=#000000>www.etcgrp.com</FONT><BR></FONT></FONT></SPAN><SPAN
lang=en-us><FONT face="Arial Narrow"> </FONT></SPAN></B> </DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> postman@gard.com
[mailto:postman@gard.com] <B>On Behalf Of </B>Varkie Thomas<BR><B>Sent:</B>
Wednesday, May 19, 2004 1:04 PM<BR><B>To:</B>
BLDG-SIM@gard.com<BR><B>Subject:</B> [BLDG-SIM] LEED
points<BR><BR></FONT></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face="Times New Roman" color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy">The EA-TAG should also consider that the
infiltration due to stack effect in a high-rise building is affected by having
entrances with a vestibule and revolving doors. </SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy"></SPAN></FONT> </P>
<P class=MsoNormal><FONT face="Times New Roman" color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy">Can occupancy based lighting and
occupancy based ventilation be considered for LEED credits </SPAN>under
“Optimize Energy Performance”? How should these options be
modeled? In DOE2 the design ventilation value can be varied by using the
occupancy schedule for the minimum OA schedule. Occupancy based lighting
would have to be “on-off” depending on occupancy = 0 or occupancy > 0.
This can vary with the space type and it is difficult to determine
for buildings zoned as perimeter and interior only. Can we assume say an
average 5% off the lighting schedule for installing occupancy based lighting
controls? How would you model daylighting controls for LEED
credits? In DOE2 you can locate the light sensor close to the window and
assume it represents a perimeter space with any depth. Are there limits
on lighting sensor location and perimeter space depths, areas and
volumes? The ASHRAE STD90 prescriptive standards are stringent in all
categories of envelope, lighting and mechanical systems. From the
responses I have received so far, significant energy cost savings (such as
60%) can be achieved with daylighting controls (not accepted by most energy
codes), renewable energy sources such as PV and GSHP, and thermal storage in
situations where there is a big difference between peak and off-peak electric
rates. </FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy"></SPAN></FONT> </P>
<P class=MsoNormal><FONT face="Times New Roman" color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy">I think that different types of standard
building models should be defined with case studies. It is difficult to
figure out the intent of STD90 and to convert STD90 legal descriptive language
into a base prototype building model. 10CFR435 is more precise. I
think that the “Energy & Atmosphere” section of LEED should be explained
in more detail and with examples.</SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy"></SPAN></FONT> </P>
<P class=MsoNormal><FONT face="Times New Roman" color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy">Varkie Thomas</SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy">Skidmore, Owings & Merrill
LLP</SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy"></SPAN></FONT> </P>
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size=2></FONT> </P></DIV></BLOCKQUOTE><PRE>
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