<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 14 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:"Arial Narrow";
panose-1:2 11 6 6 2 2 2 3 2 4;}
@font-face
{font-family:"Trebuchet MS";
panose-1:2 11 6 3 2 2 2 2 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="blue" vlink="purple">
<div class="WordSection1">
<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
</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";color:black">|
</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";color:black"> |
</span><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif";color:gray;background:white">817.222.8512 office
</span><span style="font-size:7.5pt;font-family:"Trebuchet MS","sans-serif";color:black">|</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">817.897.1882 cell
</span><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif";color:black">|</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";color:black"><a href="mailto:rick.zilar@jacobs.com">scott.west@jacobs.com</a> </span><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif";color:black">|
</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 [mailto:karen@secondlaw.biz]
<br>
<b>Sent:</b> Thursday, March 06, 2014 2:55 PM<br>
<b>To:</b> 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>
<p class="MsoNormal"><o:p> </o:p></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.<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">--<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Karen<o:p></o:p></p>
</div>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></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:<o:p></o:p></p>
<div>
<div>
<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>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:4.0pt;font-family:"Arial","sans-serif""> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></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">
BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG</a><o:p></o:p></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
<br>
<hr>
<font face="Verdana" color="Gray" size="1">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.<br>
</font>
</body>
</html>