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<div dir="ltr"><font face="Tahoma" color="#000000" size="2">It seems like you're thinking of what needs to be done for district energy.
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<div dir="ltr"><font face="tahoma" size="2"></font> </div>
<div dir="ltr"><font face="tahoma" size="2">According to ASHRAE 90.1-2004 Appendix G, "For existing building envelopes, the baseline building design shall reflect existing conditions prior to any revisions that are part of the scope of work being evaluated".</font></div>
<div dir="ltr"><font face="tahoma" size="2"></font> </div>
<div dir="ltr"><font face="tahoma" size="2">You may be right in that it's been changed in a CIR, although they tend to make things easier for the project team most of the time.</font></div>
<div dir="ltr"><font face="tahoma" size="2"></font> </div>
<div dir="ltr"><font face="tahoma" size="2">Gregg Liddick</font></div>
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<font face="Tahoma" size="2"><b>From:</b> bldg-sim-bounces@lists.onebuilding.org [bldg-sim-bounces@lists.onebuilding.org] On Behalf Of Alex Chapin [alexc@2rw.com]<br>
<b>Sent:</b> Monday, January 12, 2009 3:32 PM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Cc:</b> Allison_Gaiko@aha-engineers.com<br>
<b>Subject:</b> [Bldg-sim] Modeling Baseline Exterior wall for Renovation<br>
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<p class="MsoNormal">The way it works is as follows:</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">-Step 1, Compare proposed model to baseline model with existing wall and use this to achieve points
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<p class="MsoNormal">(p. 181 of LEED NC 2.2 EA Credit 1 Calculations Section)</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">-Step 2, Compare proposed model to baseline model with ASHRAE 90.1 walls as a check to make sure proposed is at least this efficient</p>
<p class="MsoNormal">(At the moment I can’t remember where I read this, maybe a CIR? Can anyone confirm this?)</p>
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<p class="MsoNormal"><span style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Alex Chapin, E.I.T., LEED AP</span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Energy Engineer</span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">2rw Consultants</span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">T: 434-296-2116 ext. 101</span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">F: 434-977-1862</span></p>
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<p class="MsoPlainText">Date: Mon, 12 Jan 2009 10:49:36 -0500</p>
<p class="MsoPlainText">From: "Gaiko Allison" <Allison_Gaiko@aha-engineers.com></p>
<p class="MsoPlainText">Subject: [Bldg-sim] Modeling Baseline Exterior wall for Renovation</p>
<p class="MsoPlainText">To: <bldg-sim@lists.onebuilding.org></p>
<p class="MsoPlainText">Message-ID:</p>
<p class="MsoPlainText"> <3C61A3A4F1F6F045858CAB5C84CDDCF7040B8FDE@fs7.aha-engineers.com></p>
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<p class="MsoPlainText">I am working on a renovated building and am wondering whether the</p>
<p class="MsoPlainText">baseline exterior wall should be the current existing wall or the</p>
<p class="MsoPlainText">baseline wall system as described by ASHRAE 90.1. If it matters, we are</p>
<p class="MsoPlainText">going for LEED NC points because of the extent of the renovation, not</p>
<p class="MsoPlainText">LEED EB.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Does anyone have any experience with this?</p>
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<p class="MsoNormal">Allison Gaiko, PE, LEED AP</p>
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