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just as a reminder on using interpretations for 90.1 Chapter 11,
which is the Energy Cost Budget (ECB) method, that Chapter 11/ECB
methodology is not acceptable for leed projects.<br>
<br>
per the leed 3.0 manual (page 263, section 4, last sentence of 1st
paragraph):<br>
<br>
"A model using the energy cost budget method will not be accepted."<br>
<br>
per the leed 2.2 manual, page 177, left column, 2nd full paragraph,
last sentence,<br>
<br>
"A model using the Energy Cost Budget Method will NOT be accepted
for credit under EA Credit 1."<br>
<br>
<br>
On 11/21/11 8:06 PM, Reba Schaber wrote:
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cite="mid:FAA9B7F58E5E4A46BDDF900F4CCAC3FE03ABA763DE63@PHSERVER.phmech.local"
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I
don’t have anything from USGBC, but I have some history from
ASHRAE. There are a series of interpretation requests to
ASHRAE 90.1 about how handle AC systems serving primarily
process loads. It is clear that ASHRAE considers AC systems
serving primarily process loads exempt from requirements of
ASHRAE 90.1. Since they don’t have to meet minimum
efficiencies, they need to be modeled the same when
demonstrating compliance with ASHRAE 90.1. See
interpretation 4 about a theoretical central plant that is
used mainly for IT cooling.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">“</span>The
central plant is exempt from the requirements of Standard 90.1
and should be identical in both the Proposed Building Design
and Budget Building Design.<span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">“<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The
interpretation is worded for Chapter 11, which is another
means to show compliance to the standard. However it is
interesting to note they are no longer applying this
interpretation to Appendix G of 90.1-2007. This seems like
a logical progression sense Appendix G is meant to show
energy efficiency not compliance.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">“</span>This
interpretation also applies to Section 11 of 90.1-2007 as well
as Appendix G of 90.1-2004 but does not apply to Appendix G of
90.1-2007.<span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">“<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Perhaps
that knowledge may be helpful. <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">~Reba<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<span style="font-size:11.0pt;color:#1F497D"></span><o:p></o:p>
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