Even if it is going LEED-NC or Core & Shell, the applicable ASHRAE Performance Rating Method (ASHRAE 90.1-2004 Appendix G Table G3.1(5)(f)) states that the baseline envelope should be modeled with existing conditions prior to any retrofit. The envelope for additions to the existing building should be modeled with the applicable ASHRAE Building Envelope Requirements table and corresponding Appendix G Table G3.1(5) requirements.<br>
<br>LEED for existing buildings uses benchmarking for comparison, not energy modeling.<br><br><div class="gmail_quote">On Thu, Jun 5, 2008 at 5:27 AM, Kevin Kyte <<a href="mailto:kkyte@robsonwoese.com">kkyte@robsonwoese.com</a>> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div link="blue" vlink="purple" lang="EN-US">
<div>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);">What if it's an existing building, but the project is
going LEED-NC or Core and Shell. Does the baseline get modeled as the
existing conditions of the building before demo? If a project is going for LEED
-existing buildings, then the baseline energy model should be with existing
conditions. What delegates whether the baseline model should be an ASHRAE
perpetration or existing conditions?</span></p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);">Kevin Kyte</span><span style="color: rgb(31, 73, 125);">, </span><span style="font-size: 10pt; color: rgb(31, 73, 125);">LEED AP</span></p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);">RobsonWoese, Inc.</span></p>
<p><span style="font-size: 10pt; color: rgb(31, 73, 125);">(T) 716-636-1800</span></p>
<p><span style="font-size: 10pt; color: rgb(31, 73, 125);">(F) 716-636-1856</span><span style="font-size: 10pt; color: blue;"></span></p>
<p><span style="font-size: 8pt; color: rgb(31, 73, 125);"><a href="http://robsonwoese.com/index.php" target="_blank"><span style="color: blue;">http://robsonwoese.com</span></a></span></p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<div style="border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; border-width: 1pt medium medium; padding: 3pt 0in 0in;">
<p><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;">
<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>gail<br>
<b>Sent:</b> Wednesday, June 04, 2008 5:01 PM<div class="Ih2E3d"><br>
<b>To:</b> <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br>
</div><b>Subject:</b> Re: [Bldg-sim] ASHRAE 90.1-App G: Site Shading</span></p>
</div><div><div></div><div class="Wj3C7c">
<p> </p>
<p style="margin-bottom: 12pt;">Appendix G does specifically
state that for existing buildings being gutted, the Baseline building envelope
should be modeled based on the existing conditions prior to any revisions that
are part of the scope of work being evaluated (Table G3.1(5)(f)). Therefore,
if you are modeling self-shading and adjacent buildings in the proposed case
for an existing building, they should also be modeled in the base case for
existing buildings.<br>
<br>
Best Regards,<br>
Gail Stranske<br>
CTG Energetics, Inc.</p>
<div>
<p>On Wed, Jun 4, 2008 at 1:32 PM, Demba Ndiaye <<a href="mailto:demba.ndiaye@setty.com" target="_blank">demba.ndiaye@setty.com</a>> wrote:</p>
<div>
<div>
<p><span style="font-size: 10pt; color: navy;">Eric,
</span></p>
<p><span style="font-size: 10pt; color: navy;"> </span></p>
<p><span style="font-size: 10pt; color: navy;">My
understanding is that, regardless of the fact that the building is new or
existing, there is no specific requirement regarding the modeling of
neighboring shading objects.</span></p>
<p><span style="font-size: 10pt; color: navy;"> </span></p>
<div>
<p><span style="font-size: 10pt; color: navy;">______________</span></p>
<p><span style="font-size: 10pt; color: navy;">Demba
Ndiaye</span></p>
</div>
<div style="border-style: none none none solid; border-color: -moz-use-text-color -moz-use-text-color -moz-use-text-color blue; border-width: medium medium medium 1.5pt; padding: 0in 0in 0in 4pt;">
<div>
<div style="text-align: center;" align="center">
<hr align="center" size="2" width="100%">
</div>
<p><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;"> <a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Eric Studer<br>
<b>Sent:</b> Wednesday, June 04, 2008 3:47 PM<br>
<b>To:</b> <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> [Bldg-sim] ASHRAE 90.1-App G: Site Shading</span></p>
</div>
<div>
<div>
<p> </p>
<p><span style="font-size: 10pt;">Hello,</span></p>
<p><span style="font-size: 10pt;"> </span></p>
<p><span style="font-size: 10pt;">ASHRAE
90.1-2004 Appendix G has a clause pertaining to self-shading of the baseline
building, but there does not seem to be any explicit direction regarding
shading from other objects beyond the building envelope (trees, buildings,
etc). Should the base case be modeled as being impacted by adjacent
buildings or other objects? Would this be different for a new building
versus an existing building that is being gutted?</span></p>
<p><span style="font-size: 10pt;"> </span></p>
<p><span style="font-size: 10pt;">Thanks</span></p>
<p><span style="font-size: 10pt;"> </span></p>
<p><u><span style="font-size: 10pt;">
</span></u></p>
<p> </p>
<p><span style="font-size: 10pt;">Eric Studer, PE, LEED AP<br>
DMI<br>
35 Walnut Street<br>
Wellesley, MA 02481<br>
Ph: (781) 431-1100 ext 12<br>
Fax: (781) 431-1109<br>
e-mail: <a href="mailto:estuder@dmiinc.com" target="_blank">estuder@dmiinc.com</a></span></p>
<p> </p>
</div>
</div>
</div>
</div>
</div>
<p style="margin-bottom: 12pt;"><br>
_______________________________________________<br>
Bldg-sim mailing list<br>
<a href="http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org" target="_blank">http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org</a><br>
To unsubscribe from this mailing list send a blank message to <a href="mailto:BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG" target="_blank">BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG</a></p>
</div>
<p> </p>
</div></div></div>
</div>
</blockquote></div><br>