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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The USGBC responded to a CIR submitted through our local
LEED Consultant, Brightworks, and Gwen Fuertes of the USGBC OK’d posting
this to BLDG-SIM. Replies are interspersed in the questions as <b><span
style='font-weight:bold'>USGBC Response</span></b>, in yellow highlight, but
the yellow may not survive BLDG-SIM posting. USGBC had not confirmed if
this would be posted as a CIR ruling. For specific projects, you may
still want to get separate rulings if still unsure, or don’t like the
impact of the responses on your project. . <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'>RE EAc1 Process Loads
Rules for LEED NC 2.2<b><span style='font-weight:bold'><o:p></o:p></span></b></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'>DT 7 March 2007<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'>There is a lot of uncertainty about the handling of EAc1
process loads under LEED 2.2. An all-day intermittent dialogue on BLDG-SIM,
the energy user’s group, resulted in more questions and no consensus on
how to handle the following provisions in the Reference Guide. The
dialogue also did not show that anyone had received a ruling. We request
clarification on the questions listed below, and suggest that an administrative
ruling be issued to clarify this for the whole analyst community. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'>"<i><span style='font-style:italic'>The default
process energy cost is 25% of the total energy cost for the Baseline building.
For buildings where the process energy cost is less than 25% of the baseline
building energy cost, the LEED submittal must include supporting documentation
substantiating that process energy inputs are appropriate. </span></i>"<br>
...<br>
"<i><span style='font-style:italic'>For EA Credit 1, process loads shall
be identical for both the Baseline building performance rating and for the
Proposed building performance rating. However, project teams may follow the
Exceptional Calculation Method (ASHRAE 90.1-2004 G2.5) to document measures
that reduce process loads. Documentation of process load energy savings shall
include a list of the assumptions made for both the base and proposed design,
and theoretical or empirical information supporting these assumptions. </span></i>"<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'>A series of questions resulted some of which are more
clear than others, but again did not have consensus understanding.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'>1) To model the HVAC load for a project, all
process loads must also be modeled. Under the modeling rules for NC 2.1
projects, all loads are modeled and the process loads (non-regulated loads) are
broken out of the final reported energy and energy costs. For all NC 2.2
projects, what process loads get modeled apart from what process energy and
energy cost gets reported? Should all process loads be modeled equivalent
to the method for modeling all non-regulated loads for NC 2.1 projects,
regardless of the 25% default?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><b><font size=3 face=Garamond><span
style='font-size:12.0pt;font-family:Garamond;background:yellow;font-weight:
bold'>USGBC Staff response:</span></font></b><font face=Garamond><span
style='font-family:Garamond;background:yellow'> All process loads get modeled.
If the actual process load is less than 25%, use the default (25%) or explain
the actual load in more detail. If the actual process load is more than 25%,
use the actual percentage.</span></font><font face=Garamond><span
style='font-family:Garamond'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'>2) For all projects, is the reported process energy
cost adjusted to reach 25% of baseline energy cost? Is this adjusted to
the same process energy cost value for both the baseline and design if one of
the two exceptions listed in question 3 are not met?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><b><font size=3 face=Garamond><span
style='font-size:12.0pt;font-family:Garamond;background:yellow;font-weight:
bold'>USGBC Staff response:</span></font></b><font face=Garamond><span
style='font-family:Garamond;background:yellow'> No; the reported process energy
cost is not adjusted.</span></font><font face=Garamond><span style='font-family:
Garamond'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'>3) Please confirm our understanding that two
exceptions apply to 2), 1. as noted, it is possible to model and report
less than 25% of budget energy cost for process in both the baseline and
design, with design documentation, and 2. the design may have lower process
energy modeled and reported for energy cost saving Exceptional Calculations. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><b><font size=3 face=Garamond><span
style='font-size:12.0pt;font-family:Garamond;background:yellow;font-weight:
bold'>USGBC Staff response: </span></font></b><font face=Garamond><span
style='font-family:Garamond;background:yellow'>For exception #1, it is possible
to model and report less than 25% of budget energy cost for process if this is
justified and explained fully.</span></font><font face=Garamond><span
style='font-family:Garamond'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'>4) For projects with process energy loads that
exceed 25% of baseline energy cost due to design (such as lab buildings with
high process loads), do the energy and energy cost reported get reduced to be
consistent with 25% of the baseline energy cost while modeling the actual
process energy uses? Does the reduction to 25% of baseline energy cost
apply to just the baseline as some suggested, or to both the baseline and
design if at all? <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><b><font size=3 face=Garamond><span
style='font-size:12.0pt;font-family:Garamond;background:yellow;font-weight:
bold'>USGBC Staff response:</span></font></b><font face=Garamond><span
style='font-family:Garamond;background:yellow'> Process energy loads that
exceed 25% of baseline energy cost do not get reduced to 25%; project teams
should use that energy cost percentage for the model.</span></font><font
face=Garamond><span style='font-family:Garamond'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Garamond><span style='font-size:12.0pt;
font-family:Garamond'>Thank you.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoAutoSig><st1:City w:st="on"><st1:place w:st="on"><font size=2
face=Arial><span style='font-size:11.0pt;font-family:Arial'>Thornton</span></font></st1:place></st1:City><font
size=2 face=Arial><span style='font-size:11.0pt;font-family:Arial'> Energy
Consulting<o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=2 face=Arial><span style='font-size:11.0pt;
font-family:Arial'>p. 503-231-6600 f. 503-231-3555<o:p></o:p></span></font></p>
<p class=MsoAutoSig><st1:PersonName w:st="on"><font size=2 face=Arial><span
style='font-size:11.0pt;font-family:Arial'>thorntonenergy@comcast.net</span></font></st1:PersonName><font
size=2 face=Arial><span style='font-size:11.0pt;font-family:Arial'><o:p></o:p></span></font></p>
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12.0pt'><o:p> </o:p></span></font></p>
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