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<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=763454321-11082008>All,</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=763454321-11082008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=763454321-11082008>There
is likely some confusion due to two statements in the LEED Reference
Guide:</SPAN></FONT></DIV>
<UL>
<LI><FONT face=Arial color=#0000ff size=2><SPAN class=763454321-11082008>On
Page 177, under "b. Opague Assemblies" the reference guide states
"<EM><U><STRONG>The Performance Rating Method</STRONG></U></EM> specifies the
type of assembly required for the Baseline Building wall, roof, and floor
construction. <STRONG><EM><U>The ECB method</U></EM></STRONG> varies the
construction assembly type modeled in the Building Budget Design based on the
actual construction assembly type modeled in the Proposed
Design."</SPAN></FONT></LI>
<LI><FONT face=Arial color=#0000ff size=2><SPAN class=763454321-11082008>On
Page 180, under "Building Envelope" the reference guide states
"<STRONG><EM><U>The Performance Rating Method</U></EM></STRONG> requires that
the Proposed Design be modeled as designed with a few minor exceptions. For
the Baseline Design of new buildings, the above-grade walls, roof, and floor
assemblies must be modeled using light-weight assembly types (i.e.,
steel-framed walls, roof with insulation entirely above deck, and steel-joist
floors), with ASHRAE Std. 90.1 prescriptive maximum U-factors for the
building's climate. <U>Even if the Proposed Design incorporates mass wall
construction, the Baseline Design must be modeled using a steel-framed
assembly:</U>"</SPAN></FONT></LI></UL>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=763454321-11082008>Obviously, the reference to the ECB Method on page 177
causes some confusion to the reader. However, I read that <U>all
</U>building baseline constructions should use a light-weight, steel-framed
construction per the statements on page 180.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=763454321-11082008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=763454321-11082008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=763454321-11082008>Regards</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=763454321-11082008>Mitch</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=763454321-11082008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=763454321-11082008><?xml:namespace prefix = o ns =
"urn:schemas-microsoft-com:office:office" /><o:p></o:p> </DIV>
<DIV>
<DIV class=Section1>
<P style="MARGIN-BOTTOM: 6pt"><FONT color=#000000><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Mitchell J.
Dec</SPAN></B><BR></FONT><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><FONT
color=#000000><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Senior Energy
Analyst</SPAN><BR><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">LEEDŽ
Accredited Professional</SPAN></FONT></SPAN></P>
<P style="MARGIN-BOTTOM: 6pt"><FONT face=Arial size=2></FONT><A
href="http://www.glumac.com/"><SPAN
style="TEXT-DECORATION: none; text-underline: none"><FONT color=#000000><IMG
height=37 src="cid:763454321@11082008-2c4f" width=339 border=0
v:shapes="_x0000_i1025"><FONT face=Arial
size=2></FONT></FONT></P></SPAN></A><o:p></o:p>
<DIV style="MARGIN-BOTTOM: 6pt"><FONT color=#000000>
<HR style="WIDTH: 247.5pt" align=left width=330 color=#9acb33 noShade SIZE=2>
</FONT></DIV>
<P><FONT color=#000000><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">320 SW
Washington, Suite 200</SPAN><BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Portland, OR
97204-2640</SPAN><BR></FONT><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><FONT color=#000000>T.
503.227.5280 F. 503.274.7674<BR>Direct: <SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">503.345.6283</SPAN></FONT></SPAN></P>
<P><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN><BR><B><SPAN
style="COLOR: #333333">Thinking. Inside the
building.</SPAN></B></SPAN><BR><U><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial"><A
href="http://www.glumac.com/"
target=_blank>http://www.glumac.com/</A></SPAN></U>
</P></DIV></SPAN></FONT></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org]<B>On Behalf Of </B>Aulbach,
John<BR><B>Sent:</B> Monday, August 11, 2008 2:29 PM<BR><B>To:</B> Chien Si
Harriman; bldg-sim@lists.onebuilding.org<BR><B>Subject:</B> Re: [Bldg-sim]
multiple wall constructions for LEED<BR><BR></DIV></FONT>
<DIV dir=ltr align=left><SPAN class=984422521-11082008><FONT face=Arial
color=#0000ff size=2>Hi Chien Si !!</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=984422521-11082008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=984422521-11082008><FONT face=Arial
color=#0000ff size=2>I believe you need only put in the one ASHRAE 90.1
minimum wall U-value. Exactly what Table 5.5 asks for.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=984422521-11082008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=984422521-11082008>
<DIV align=left>
<DIV align=left><FONT color=#0000ff>John R. Aulbach, PE, CEM</FONT></DIV>
<DIV align=left><FONT face=Arial size=2><EM>Project Manager</EM></FONT></DIV>
<DIV align=left><FONT face=Arial size=2><FONT color=#0000ff>Nexant,
Inc</FONT>.</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>701 West Kimberly Ave., Suite
245</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Placentia, CA 92870-6342
USA</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Phone: 714-524-4402</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Fax: 714-524-4407</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>email: <A
title=mailto:jaulbach@nexant.com
href="mailto:jaulbach@nexant.com">jaulbach@nexant.com</A></FONT></DIV>
<DIV> </DIV></DIV></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Chien Si
Harriman<BR><B>Sent:</B> Monday, August 11, 2008 2:21 PM<BR><B>To:</B>
bldg-sim@lists.onebuilding.org<BR><B>Subject:</B> [Bldg-sim] multiple wall
constructions for LEED<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV><FONT face=Arial color=#000000 size=2>Hi all-</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>A quick, but kind of hazy question for me at
least, regarding LEED projects. Let's just say, that a building is
composed of multiple wall types, spanning a range of the ASHRAE 90.1
definitions...some portions of the building is steel framed, another portion
is mass wall, and yet another portion is wood framed, for example. In
this case, what would the baseline be defined as? Does each wall remain
categorically intact, and you simply choose the baseline U-factor that
corresponds to that wall type, or do you have to determine the wall type that
makes up the majority of the proposed building, and choose this wall type as
the baseline wall type? </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks in advance,</FONT></DIV>
<DIV><FONT face=Arial size=2>Chien</FONT></DIV></BLOCKQUOTE></BODY></HTML>