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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The GBCI approach seems to be aimed at keeping people from gaming the system, more than suggesting designers stick to the 62.1 minimum. Don’t add a bunch of
extra OA to get the LEED credit, and then claim energy credit from DCV…<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">One point to contrast to this is that sometimes local codes, guidelines, or even client design standards might have rates higher than ASHRAE 62.1. In this case
90.1 can’t contradict the designer’s responsibility, and the baseline should have the identical outside air requirement, even if it is higher than ASHRAE 62.1.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">62.1 is still a standard that sets the minimum ventilation rates.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">As several others have noted there are specific conditions if DCV is used as a strategy to reduce outside air that might override the baseline OA quantity in
some of those cases. It would also make sense to me that the baseline could be required to have an identical DCV system in that case and keep the rates the same, but I’ve never seen that as an official recommendation.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">David<o:p></o:p></span></p>
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<p class="MsoNormal"><u><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black">
</span></u><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Calibri","sans-serif";color:black"> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">David S. Eldridge, Jr., P.E., LEED AP BD+C, BEMP, BEAP, HBDP</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#244061">Grumman/Butkus Associates</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><u><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black">
</span></u><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black"> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";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""> bldg-sim-bounces@lists.onebuilding.org [mailto:bldg-sim-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Jim Dirkes<br>
<b>Sent:</b> Thursday, March 06, 2014 3:32 PM<br>
<b>To:</b> West, Scott P; 'Karen Walkerman'; 'Joe Chappell'<br>
<b>Cc:</b> 'bldg-sim@lists.onebuilding.org'<br>
<b>Subject:</b> Re: [Bldg-sim] LEED Increased Ventilation Credit and Energy Modeling<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546A">I have to say:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="font-size:11.0pt;font-family:Symbol;color:#44546A"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546A">I have not followed the GBCI closely on this topic,<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="font-size:11.0pt;font-family:Symbol;color:#44546A"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><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.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="font-size:11.0pt;font-family:Symbol;color:#44546A"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546A"><o:p> </o:p></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/"><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 USA<br>
616 450 8653<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546A"><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"">
<a href="mailto:bldg-sim-bounces@lists.onebuilding.org">bldg-sim-bounces@lists.onebuilding.org</a> [<a href="mailto:bldg-sim-bounces@lists.onebuilding.org">mailto: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> 'bldg-sim@lists.onebuilding.org'<br>
<b>Subject:</b> Re: [Bldg-sim] LEED Increased Ventilation Credit and Energy Modeling<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></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.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></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
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</span><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif";color:gray;background:white">817.222.8512 office
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</span><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif";color:black"><a href="http://www.jacobs.com/">www.jacobs.com</a></span><span style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:black"> </span><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif";color:black">|
<a href="http://www.jacobs.com/energyportfolio"><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";color:black">
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></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">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">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Bldg-sim] LEED Increased Ventilation Credit and Energy Modeling<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<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.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">--<o:p></o:p></p>
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<p class="MsoNormal">Karen<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
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<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:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Good day,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">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" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">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" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Does anyone have any experience with LEED on this issue? Thanks in advance.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Kind regards,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Joe Chappell</span></b><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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