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<p class="MsoNormal"><span style="color:#1F497D">Ross,<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 always modeled partitions identically for the baseline and proposed models, even for existing buildings. The wording in Appendix G is “For existing
<i>building envelopes</i>, the <i>baseline building design</i> shall reflect existing conditions…” Interior partitions are not part of the building envelope, and are not covered in the Building Envelope Requirements Tables 5.5 in ASHRAE 90.1. If you are insulating
the walls around the data center, I would do the same in both the baseline and proposed models.<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">You didn’t elaborate on what “out of whack” means for the HVAC systems. In case you are not already doing it, the data center should be modeled in the baseline with its own single-zone system per G3.1.1. If the
concern is that the data center is so cold that it is causing heating in adjacent spaces, you could use this opportunity to educate the design team/client regarding recent research that shows data centers don’t have to be kept as cold as conventional wisdom
has dictated. Don’t forget that the data center constitutes a large process load that should be modeled identically in the baseline and proposed models, and that this offers an opportunity for energy savings through heat recovery, efficient cooling, etc.<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">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Bill<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><a href="mailto:wbishop@pathfinder-ea.com"><b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium","sans-serif";color:black;text-decoration:none"><img border="0" width="481" height="118" id="_x0000_i1031" src="cid:image006.png@01CD4F89.EA1F8320"></span></b></a><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Ross Farris<br>
<b>Sent:</b> Wednesday, June 20, 2012 7:12 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Existing Building Constructions modeled for LEED<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Greetings everyone,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am going to be modeling an existing building as a “major renovation” under LEED NC 2009. Per the App G Guidelines, I will be using all of the constructions that exist in the existing building as opposed to creating constructions as per
90.1 for the baseline model. However, I have come across an interesting situation that I have not dealt with previously. We will be adding a large data center to an interior space on the top floor, which is currently just office space. Currently there is no
insulation in the walls and floors surrounding this new data center and it is throwing the HVAC systems assigned to adjacent spaces way out of whack. Though I would like to be able to take some credit for properly insulating the interior constructions surrounding
the new data center, it doesn’t seem appropriate to leave the baseline with completely uninsulated interior walls and floors.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am wondering if anyone has come across this issue in the past and how you may have handled it. Please feel free to contact me directly if you need more information or have any questions. Thanks in advance for your comments.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Cheers,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Ross Farris, CEPE</span></b><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><br>
</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Energy Analyst</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><br>
<br>
</span><a href="http://www.glumac.com/"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";text-decoration:none"><img border="0" width="343" height="41" id="Picture_x0020_1" src="cid:image007.gif@01CD4F89.EA1F8320" alt="http://www.glumac.com/glumacsig.gif"></span></a><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D"><img border="0" width="49" height="45" id="Picture_x0020_3" src="cid:image008.jpg@01CD4F89.EA1F8320" alt="40 yr color small"></span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial","sans-serif"">150 California Street, 3rd Floor</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><br>
</span><span style="font-size:9.0pt;font-family:"Arial","sans-serif"">San Francisco, CA 94111</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><br>
</span><span style="font-size:9.0pt;font-family:"Arial","sans-serif"">T. 415.398.7667 ext.4083 F. 415.398.0596<br>
</span><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#333333">Thinking. Inside the building.<o:p></o:p></span></b></p>
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<p class="MsoNormal"><a href="http://www.twitter.com/glumacengineers"><span style="color:windowtext;text-decoration:none"><img border="0" width="22" height="22" id="Picture_x0020_2" src="cid:image009.png@01CD4F89.EA1F8320" alt="cid:image001.png@01CC45FA.A3365810"></span></a><a href="http://www.facebook.com/pages/Glumac/213797265436"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#333333;text-decoration:none"><img border="0" width="22" height="22" id="Picture_x0020_5" src="cid:image010.jpg@01CD4F89.EA1F8320" alt="cid:image004.jpg@01CC98A3.24F9BEA0"></span></b></a><a href="http://www.linkedin.com/company/34034"><span style="color:windowtext;text-decoration:none"><img border="0" width="22" height="22" id="Picture_x0020_4" src="cid:image011.jpg@01CD4F89.EA1F8320" alt="cid:image002.jpg@01CC45FA.A3365810"></span></a><o:p></o:p></p>
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