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<p class="MsoNormal"><span style="color:#1F497D">Hi Joe, <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">What version of LEED are you pursuing?<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">For LEED 2009 (A90.1-2007 Appendix G), baseline and proposed ventilation rates should be modeled identically except when taking credit for demand controlled ventilation where it’s not required by A90.1-2007.
<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">For LEED v4 (A90.1-2010 Appendix G), if you are pursuing the 30% Increased Ventilation credit, the baseline model will have the typical A62.1 ventilation rates, and the proposed model will include the 30% increase
in ventilation. I believe this is incorporated in exception (c) of A90.1-2010 section G3.1.2.6. LEED v4 and A90.1-2010 are recognizing the fact that increasing outdoor air volumes will have an energy impact, and thus project teams perusing LEED v4 will have
to be cognizant of the IEQc2 credit and its potential impact on EAp2/EAc1.<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 haven’t seen an official LEED v4 interpretation of this issue yet, but I heard this was coming and the new language in A90.1-2010 Appendix G seems to support this.<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">Best,<o:p></o:p></span></p>
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<b><span style="font-size:10.0pt;line-height:115%;color:#660000;text-transform:uppercase">LYLE KECK</span></b><b><span style="font-size:9.0pt;line-height:115%;color:#333333">
</span></b><span style="font-size:9.0pt;line-height:115%;color:#333333">LEED AP BD+C, EIT<br>
</span><span style="font-size:10.0pt;line-height:115%;color:black;text-transform:uppercase">SUSTAINABLE DESIGN CONSULTANT</span><span style="font-size:9.0pt;line-height:115%;color:#333333"><o:p></o:p></span></p>
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<b><span style="font-size:9.0pt;line-height:115%;color:#660000">AEI</span></b><span style="font-size:9.0pt;line-height:115%;color:#333333"> | AFFILIATED ENGINEERS, INC.<br>
1601 Fifth Avenue, Suite 1400 | Seattle, WA 98101<br>
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</span><span style="font-size:9.0pt;line-height:115%;color:#660000">P: 206.829.7307 | F: 206.256.0423</span><span style="font-size:9.0pt;line-height:115%;color:#333333"> <br>
</span><span style="font-size:9.0pt;line-height:115%;color:#660000"><a href="mailto:lkeck@aeieng.com"><span style="color:#660000;text-decoration:none">lkeck@aeieng.com</span><span style="color:#660000;text-decoration:none"> </span></a></span><span style="font-size:9.0pt;line-height:115%;color:#660000">
| <b><a href="http://www.aeieng.com/"><span style="color:#660000;text-decoration:none">www.aeieng.com</span></a></b></span><span style="font-size:9.0pt;line-height:115%;color:#333333"> <o:p></o:p></span></p>
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<p class="MsoNormal"><b>From:</b> Joe Chappell [mailto:JoeC@designengineers.com] <br>
<b>Sent:</b> Thursday, March 06, 2014 12:51 PM<br>
<b>To:</b> 'equest-users@lists.onebuilding.org'<br>
<b>Subject:</b> [Equest-users] LEED Increased Ventilation Credit and Energy Modeling<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Good day,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have a question regarding the LEED credit for Increased Ventilation (IEQc2). This is the credit awarded for exceeding ventilation in all spaces by 30% beyond the ASHRAE standard 62.1 requirements. It seems obvious that the design model
ventilation rates would be those 30% higher than 62.1 requirements. What then would the baseline model ventilation rates be?
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If you strictly follow 90.1 Appendix G, you should always model baseline and proposed equivalent except for when taking credit for demand controlled ventilation. However, it seems in this case that it could also be argued (by LEED) that
you should model the ASHRAE 62.1 required ventilation rates in the baseline model, not those that are 30% higher and therefore pay the energy expense( most climates) for increased outside air.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Does anyone have any experience with LEED on this issue? Thanks in advance.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Kind regards,<o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Joe Chappell</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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