<p dir="ltr">Jim,</p>
<p dir="ltr">In my understanding the increased ventilation LEED point was created in response to a deduction in the required ventilation rates by ASHRAE between versions of 62.1. The confusion around how this affected the energy credit came later. </p>
<div class="gmail_quot<blockquote class=" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546a">I have to say:<u></u><u></u></span></p>
<p><u></u><span style="font-size:11.0pt;font-family:Symbol;color:#44546a"><span>·<span style="font:7.0pt "Times New Roman""> </span></span></span><u></u><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546a">I have not followed the GBCI closely on this topic,<u></u><u></u></span></p>
<p><u></u><span style="font-size:11.0pt;font-family:Symbol;color:#44546a"><span>·<span style="font:7.0pt "Times New Roman""> </span></span></span><u></u><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546a">But it seems like the credit was created to “compare and contrast” the benefits of increased IEQ against the known energy penalty.<u></u><u></u></span></p>
<p><u></u><span style="font-size:11.0pt;font-family:Symbol;color:#44546a"><span>·<span style="font:7.0pt "Times New Roman""> </span></span></span><u></u><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546a">If that’s true, then the Baseline should be per 62.1 and Proposed at 1305 of the Baseline.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546a"><u></u> <u></u></span></p><div><p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#0a3782">James V Dirkes II, PE, BEMP, LEED AP</span></b><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#3434f4"><br>
</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546a"><a href="http://www.buildingperformanceteam.com/" target="_blank"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#bfbfbf">www.buildingperformanceteam.com</span></b></a></span><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#bfbfbf"> <br>
</span></b><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#548dd4">Energy Analysis, Commissioning & Training Services</span></b><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#778188"><br>
</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#778188">1631 Acacia Drive, Grand Rapids, MI 49504</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#778188"> USA</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#778188"><br>
<a href="tel:616%20450%208653" value="+16164508653" target="_blank">616 450 8653</a><u></u><u></u></span></p></div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546a"><u></u> <u></u></span></p>
<div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in"><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""> <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>West, Scott P<br>
<b>Sent:</b> Thursday, March 06, 2014 4:24 PM<br><b>To:</b> 'Karen Walkerman'; 'Joe Chappell'<br><b>Cc:</b> '<a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a>'<br>
<b>Subject:</b> Re: [Bldg-sim] LEED Increased Ventilation Credit and Energy Modeling<u></u><u></u></span></p></div></div><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I have to agree with Karen on this. For LEED modeling at least, you can model the ventilation rates the same even if they are above 62.1 minimums. I would add though that you could apply Addendum bj to 90.1-2007 which add an exception to this for ventilation systems that improve air distribution effectiveness (primarily displacement ventilation systems). I’m not sure if USGBC has ruled on this specifically but they generally allow one to adopt 90.1 addenda as long as you state which ones you’re using. This addendum also adds an exception for DCV similar to what Karen mentioned. <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:#003366">Scott P. West, P.E., LEED AP </span><span style="font-size:8.0pt;font-family:"Trebuchet MS","sans-serif";color:#003366">BD+C</span><span style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:#003366">, BEAP, BEMP </span><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif";color:gray">| </span><b><span style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:#003366">JACOBS</span></b><span style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:#003366"> </span><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif";color:gray">| Mechanical Engineer </span><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif"">| </span><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif";color:gray">Energy & Power Solutions</span><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif""> | </span><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif";color:gray;background:white"><a href="tel:817.222.8512" value="+18172228512" target="_blank">817.222.8512</a> office </span><span style="font-size:7.5pt;font-family:"Trebuchet MS","sans-serif"">|</span><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif";color:#003366"> </span><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif";color:gray"><a href="tel:817.897.1882" value="+18178971882" target="_blank">817.897.1882</a> cell </span><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif"">|</span><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif";color:#003366"> </span><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif""><a href="mailto:rick.zilar@jacobs.com" target="_blank">scott.west@jacobs.com</a> </span><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif"">| </span><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif""><a href="http://www.jacobs.com/" target="_blank">www.jacobs.com</a></span><span style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif""> </span><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif"">| <a href="http://www.jacobs.com/energyportfolio" target="_blank"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif"">www.jacobs.com/energyportfolio</span></a></span><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><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""> Karen Walkerman [<a href="mailto:karen@secondlaw.biz" target="_blank">mailto:karen@secondlaw.biz</a>] <br>
<b>Sent:</b> Thursday, March 06, 2014 2:55 PM<br><b>To:</b> Joe Chappell<br><b>Cc:</b> <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br><b>Subject:</b> Re: [Bldg-sim] LEED Increased Ventilation Credit and Energy Modeling<u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p><div><p class="MsoNormal">There has been lots of discussion and misinformation about this in the past. I believe the current take on this from a LEED perspective is that for each space in the proposed design where ventilation is above the required minimum AND there is demand controlled ventilation, the equivalent space in the baseline design shall be modeled with the minimum required ventilation as per ASHRAE 62.1. For all other cases, baseline ventilation rates should match the proposed ventilation rates, regardless of whether the proposed design uses an increased ventilation rate or not.<u></u><u></u></p>
<div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">--<u></u><u></u></p></div><div><p class="MsoNormal">Karen<u></u><u></u></p></div></div><div><p class="MsoNormal" style="margin-bottom:12.0pt"><u></u> <u></u></p>
<div><p class="MsoNormal">On Thu, Mar 6, 2014 at 3:50 PM, Joe Chappell <<a href="mailto:JoeC@designengineers.com" target="_blank">JoeC@designengineers.com</a>> wrote:<u></u><u></u></p><div><div><p class="MsoNormal">
Good day,<u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></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? <u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></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.<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal">Does anyone have any experience with LEED on this issue? Thanks in advance.<u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal">Kind regards,<u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Joe Chappell</span></b><u></u><u></u></p><p class="MsoNormal"><span style="font-size:4.0pt;font-family:"Arial","sans-serif""> </span><u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p></div></div><p class="MsoNormal" style="margin-bottom:12.0pt"><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><u></u><u></u></p></div><p class="MsoNormal"><u></u> <u></u></p>
</div><p class="MsoNormal"><u></u> <u></u></p><div class="MsoNormal" align="center" style="text-align:center"><hr size="2" width="100%" align="center"></div><p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">NOTICE - This communication may contain confidential and privileged information that is for the sole use of the intended recipient. Any viewing, copying or distribution of, or reliance on this message by unintended recipients is strictly prohibited. If you have received this message in error, please notify us immediately by replying to the message and deleting it from your computer.</span><u></u><u></u></p>
</div></div><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">BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG</a><br>
<br></div>