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<p class="MsoNormal"><span style="color:#1F497D">One thought is that this might be considered in LEED lingo as an “exceptional calculation” – i.e. there would be three models:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo1"><![if !supportLists]><span style="font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Proposed building as-designed<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo1"><![if !supportLists]><span style="font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Baseline building constructed with the same geometry as proposed using code minimum materials and equipment<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo1"><![if !supportLists]><span style="font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Baseline building with conventional geometry using code minimum materials and equipment<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">By anlyzing the difference between the two baselines you’d have an idea what the impact was from changing the geometry with everything else the same.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I’ve reversed the order from what LEED asks for – usually the exceptional calculation is for adding a new energy-saving feature on top of the proposed case, but since your exceptional calculation is modifying
the geometry I think it makes sense to go in reverse order from a calculation point of view. This will be easier to review step-by-step than making the middle case a proposed building with conventional geometry.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I’m curious…you don’t have to respond, but some questions you might ask on behalf of your program:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Does the new geometry cost more? If yes, can it be quantified? In most new construction programs an efficiency measure must add an incremental cost to be eligible for an incentive.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Is the floor area the same in both models, or is there a reduction in real estate? If there was some innovation that resulted in a smaller building in the proposed case, the total energy use might be
less while EUI could increase. <o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo2">
<![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">a.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">For an incentive program it might be fine to look for absolute kWh or therms saved, rather than an EUI percentage improvement over a baseline.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Was the change in geometry driven by energy savings, or were other factors dominant? This might push you one way or the other in determining if an energy efficiency incentive is warranted.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">4.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">How does the proposed energy use case compare to conventional benchmarks? How does the conventional baseline compare to benchmarking data?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I hope this helps!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">David<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><u><span style="color:black">
</span></u><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;color:black"> </span><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">David S. Eldridge, Jr., P.E., LEED AP BD+C, BEMP, BEAP, HBDP</span><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="color:#244061">Grumman/Butkus Associates</span></b><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><u><span style="color:black">
</span></u><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> </span><span style="color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>From:</b> Equest-users [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Russo, Bryan<br>
<b>Sent:</b> Wednesday, October 07, 2015 4:17 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] LEED Energy Model Baseline vs Proposed Designs Interpretation Question<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I work in an energy conservation program at a utility and have a question regarding baseline vs. proposed designs within energy models. A customer is considering a design approach that results in a fairly large departure from a standard
design. In specific, the building foot print and geometry departs significantly from a typical baseline building, but the proposed design accomplishes all required parameters of the baseline design, i.e., the building produces the same function. My general
experiences with approaching baseline vs. proposed energy models is that the footprint and general geometry of the building remains fixed. However, what’s the recommended approach when the proposed design yields a certain building geometry that would not be
encountered in a typical, baseline building, i.e., attempting to model a baseline building with the proposed geometry would not yield sensible results? <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Bryan<o:p></o:p></p>
<p class="MsoNormal">_______________________________________________________________________<o:p></o:p></p>
<p class="MsoNormal">Bryan Russo, BESA<o:p></o:p></p>
<p class="MsoNormal">Senior Engineer<o:p></o:p></p>
<p class="MsoNormal">Conservation Resources Management<o:p></o:p></p>
<p class="MsoNormal">Tacoma Power<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt">email: <a href="mailto:brusso@ci.tacoma.wa.us">
<span style="color:windowtext">brusso@ci.tacoma.wa.us</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">office 253.502.8822<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">cell 253.306.0670<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">fax 253.502.8276<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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