<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 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:"Futura LT Book";
panose-1:2 0 5 4 3 0 0 2 0 3;}
@font-face
{font-family:"\@SimSun";
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:"Century Gothic";
panose-1:2 11 5 2 2 2 2 2 2 4;}
@font-face
{font-family:Univers;
panose-1:0 0 0 0 0 0 0 0 0 0;}
/* 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;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman",serif;}
span.EmailStyle18
{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 agree with Genia – you should probably model a separate air handler for offices and Labs (in the baseline).
<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">Another strategy sometimes used in Lab buildings is to cascade the airflow from the offices to the labs. Generally the ventilation requirements for Labs are exhaust
based (if you need 10 air changes - that’s saying you need to exhaust 10 air changes). Your supply can be a combination of fresh air and makeup air from the offices. This will actually reduce the overall outside air used (more than 2 separate air handlers)
– your total fresh air intake = lab exhaust, whereas in the two air handler situation your total fresh air intake = lab exhaust+ ventilation requirements for the office.
<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>
<table class="MsoNormalTable" border="0" cellpadding="0">
<tbody>
<tr>
<td valign="top" style="padding:.75pt .75pt .75pt .75pt">
<p class="MsoNormal" style="line-height:12.0pt"><b><span style="font-size:9.0pt;font-family:"Futura LT Book";color:#E33B45">Vikram Sami</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><br>
</span><span style="font-size:7.0pt;font-family:"Futura LT Book";color:#666666">AIA, BEMP, LEED BD+C</span><span style="font-size:9.0pt;font-family:"Futura LT Book";color:black"> </span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><br>
</span><span style="font-size:9.0pt;font-family:"Futura LT Book";color:#666666">Associate Partner</span><span style="font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
</td>
<td width="16" style="width:12.0pt;padding:.75pt .75pt .75pt .75pt">
<p class="MsoNormal" style="line-height:12.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> <o:p></o:p></span></p>
</td>
<td valign="top" style="padding:.75pt .75pt .75pt .75pt">
<p class="MsoNormal" style="line-height:12.0pt"><span style="font-size:9.0pt;font-family:"Futura LT Book";color:#666666">ZGF ARCHITECTS LLP</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><br>
<br>
<o:p></o:p></span></p>
</td>
</tr>
</tbody>
</table>
<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"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Bldg-sim [mailto:bldg-sim-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Evgenia Gorbachinsky<br>
<b>Sent:</b> Wednesday, April 08, 2015 8:57 AM<br>
<b>To:</b> Joe Chappell<br>
<b>Cc:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] LEED/Appendix G - Laboratory Question<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal">Joe,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">I have always modeled lab spaces with a separate system for the baseline design according to section G3.1.1 ( exception c or d). In this case lab spaces will have a separate system than the rest of the building (office spaces). The ventilation
rate shall be the same in both cases (G3.1.2.5) until additional controls are provided for the proposed design (CO sensors, DCV ventilation, or any specific controls that are not described in section 6 of the ASHRAE 90.1).
<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">The baseline design shall be modeled meeting all mandatory and prescriptive options of section 6. If 90.1-2007 Section 6.5.7.2 provides an exception for energy recovery, then it should be modeled in the Baseline Design too. If you provide
more energy efficiency controls that are not described in section 6 and appendix G, then you can take a credit for the Proposed Design. For example you reduce air to 75% or 100% during unoccupied hours , but in the baseline design you reduce it only to 50%
as G 3.1.1 exception d says or section 6.5.7.2 <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">I hope my understanding helps you. But I would like to know other opinions too, and if it is any exceptional cases are possible.
<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"Univers",serif;color:#002857">Genia Gorbachinsky, LEED GA</span></b><span style="color:black">
</span><o:p></o:p></p>
<p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:10.0pt;font-family:"Century Gothic",sans-serif;color:#1F497D">Energy Engineering Specialist</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On Tue, Apr 7, 2015 at 6:21 PM, Joe Chappell <<a href="mailto:Joe.Chappell@designengineers.com" target="_blank">Joe.Chappell@designengineers.com</a>> wrote:<o:p></o:p></p>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi all,<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 related to modeling a laboratory building via Appendix G methodology for LEED 2009. I have an inclination as to the answer based on my experience using Appendix
G, but I’m looking to cite the specific section(s)/argument as to whether or not the following would be allowed:
<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><span style="color:#4472C4">It is common practice for lab buildings to utilize one mechanical system type throughout the building to maintain flexibility for conversion of spaces
between offices and labs and vice versa. These buildings therefore rely on a 100% exhaust system in all spaces no matter the function. Our building’s proposed design makes a conscientious energy efficiency decision to reduce exhaust air and associated makeup
by installing a second mechanical system (not 100% exhaust) type to serve these office areas. This design decision also comes with additional first costs (another mechanical system), and hence should be considered an energy efficiency strategy of the proposed
building. </span></i><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><i><span style="color:#4472C4"> </span></i><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><i><span style="color:#4472C4">Is it allowed for the baseline and proposed energy models to consider different exhaust requirements for the systems serving the office areas, the
baseline’s requiring a 100% exhaust system, while the proposed building’s does not?</span></i><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#2E74B5"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">There may be other more relevant sections to coming up with a correction interpretation on this, but so far, I’ve noted that 90.1-2007 Section 6.5.7.2 provides an exception for
energy recovery for a. VAV hood exhaust and room supply systems capable of reducing exhaust and makeup air volume to 50% or less of design values. This to me suggests and confirms that the base system would be one that is a 100% exhaust type.<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 am very interested to know if anyone has direct experience applying this same/similar logic in LEED models, or has learned of an interpretation that is acceptable by ASHRAE &
LEED.<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"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Joe Chappell PE</span></b><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"> <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>
</blockquote>
</div>
<p class="MsoNormal"><br>
<br clear="all">
<br>
-- <o:p></o:p></p>
<div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="background:white"><br>
<span style="color:black">Evgenia</span></span></b><o:p></o:p></p>
</div>
</div>
</div>
</div>
</div>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<title>zgfDisclaimer</title>
<table border="0" style="line-height:16px">
<tbody>
<tr>
<td valign="top"><span style="color:#666666;font-family:futura lt book,arial;font-size:12px;line-height:15px"><a href="https://www.zgf.com/ZGF_Email_Disclaimer.html">ZGF Email Disclaimer</a></span>
</td>
</tr>
</tbody>
</table>
</body>
</html>