<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)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@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:Tahoma;
        panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
        {margin:0in;
        margin-bottom:.0001pt;
        font-size:11.0pt;
        font-family:"Calibri","sans-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.MsoPlainText, li.MsoPlainText, div.MsoPlainText
        {mso-style-priority:99;
        mso-style-link:"Plain Text Char";
        margin:0in;
        margin-bottom:.0001pt;
        font-size:11.0pt;
        font-family:"Calibri","sans-serif";}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
        {mso-style-priority:99;
        mso-style-link:"Balloon Text Char";
        margin:0in;
        margin-bottom:.0001pt;
        font-size:8.0pt;
        font-family:"Tahoma","sans-serif";}
span.EmailStyle17
        {mso-style-type:personal-compose;
        font-family:"Calibri","sans-serif";
        color:windowtext;}
span.BalloonTextChar
        {mso-style-name:"Balloon Text Char";
        mso-style-priority:99;
        mso-style-link:"Balloon Text";
        font-family:"Tahoma","sans-serif";}
span.PlainTextChar
        {mso-style-name:"Plain Text Char";
        mso-style-priority:99;
        mso-style-link:"Plain Text";
        font-family:"Calibri","sans-serif";}
.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="MsoPlainText">The 90.1-2007 fan pressure drop allowance includes credit for sound attenuation sections. Do you apply the credit for each silencer on a system? The system I am looking at has 3 silencers, one on the supply duct, one on each or two return
 ducts entering the AHU.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></b></p>
<table class="MsoNormalTable" border="0" cellspacing="20" cellpadding="0" width="600" style="width:6.25in">
<tbody>
<tr>
<td width="70" valign="top" style="width:52.5pt;padding:0in 0in 0in 0in">
<p class="MsoNormal"><a href="http://www.rwdi.com/assets/logos/RWDI-logo.gif"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:windowtext;text-decoration:none"><img border="0" width="70" height="70" id="Picture_x0020_1" src="cid:image001.jpg@01D2919A.09026A30" alt="Title: RWDI - Description: RWDI logo"></span></a><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p></o:p></span></p>
</td>
<td width="484" valign="top" style="width:363.0pt;padding:0in 0in 0in 0in">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:10.5pt;font-family:"Arial","sans-serif";color:#005EB8">Christopher Jones, </span></b><b><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#005EB8">P.Eng.
</span></b><span style="font-size:10.5pt;font-family:"Arial","sans-serif";color:#999999">|
</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#999999">Senior Energy Analyst</span><span style="font-size:12.0pt;font-family:"Arial","sans-serif""><br>
</span><b><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#999999">RWDI</span></b><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#999999"><br>
901 King Street West, Suite 400, Toronto, ON M5V 3H5 Canada<br>
Tel: (519) 823-1311 ext 2052<br>
<a href="http://www.rwdi.com/"><span style="color:#999999">rwdi.com</span></a></span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p></o:p></span></p>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div style="font-size:7pt; font-family=Arial;">
<hr>
<b>RWDI - A Platinum Member of Canada's 50 Best Managed Companies</b> <br>
This communication is intended for the sole use of the party to whom it was addressed and may contain information that is privileged and/or confidential. Any other distribution, copying or disclosure is strictly prohibited. If you received this email in error,
 please notify us immediately by replying to this email and delete the message without retaining any hard or electronic copies of same. Outgoing emails are scanned for viruses, but no warranty is made to their absence in this email or attachments. If you require
 any information supplied by RWDI in a different format to facilitate accessibility, contact the sender of the email, email solutions@rwdi.com or call +1.519.823.1311.
<hr>
</div>
</body>
</html>