<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"><meta name="Generator" content="Microsoft Word 12 (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;}
/* 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
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:blue;
text-decoration:underline;}
p
{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;
font-family:"Arial","sans-serif";
color:navy;}
span.EmailStyle19
{mso-style-type:personal-reply;
color:black;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;}
div.WordSection1
{page:WordSection1;}
--></style></head><body lang="EN-US" link="blue" vlink="blue"><div class="WordSection1"><p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">If this is for a LEED project, Table 3.1, p28 of the USGBC “AEMG” says no separate outside air handling unit for baseline.</span></font></p>
<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black"> </span></font></p><p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">Perhaps the 90.1 User’s Manual may also clarify, I don’t have 2007 UM in front of me.</span></font></p>
<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black"> </span></font></p><p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">David</span></font></p>
<div><p class="MsoNormal"><u><font size="2" color="black" face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black"> </span></font></u></p>
<p class="MsoNormal"><font size="1" color="black" face="Calibri"><span style="font-size:8.0pt;font-family:"Calibri","sans-serif";color:black"> </span></font></p><p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">David S. Eldridge, Jr., P.E., LEED AP BD+C, BEMP, HBDP</span></font></p>
<p class="MsoNormal"><b><font size="2" color="#244061" face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#244061;font-weight:bold">Grumman/Butkus Associates</span></font></b><font size="1" color="gray" face="Calibri"><span style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:gray"></span></font></p>
<p class="MsoNormal"><u><font size="2" color="black" face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black"> </span></font></u></p>
</div><p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black"> </span></font></p><div style="border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt">
<div><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in"><p class="MsoNormal"><b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";font-weight:bold">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a> [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>] <b><span style="font-weight:bold">On Behalf Of </span></b>Bishop, Bill<br>
<b><span style="font-weight:bold">Sent:</span></b> Thursday, January 27, 2011 10:35 AM<br><b><span style="font-weight:bold">To:</span></b> Susan F; Nick Caton<br><b><span style="font-weight:bold">Cc:</span></b> <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> Re: [Equest-users] DOAS in baseline</span></font></p></div></div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:navy">Susan,</span></font></p><p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:navy"> </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:navy">My short answer is no, there is nothing in Appendix G that requires you or allows you to model a DOAS system that preconditions outside air. As you and Nick said, first use G3.1.1 for the system type. Then refer to G3.1.2.10 to determine if exhaust air energy recovery is required. Keep minimum outside air requirements identical between the baseline and proposed per G3.1.2.5. If the DOAS penalizes your proposed design from an energy perspective, check Table 6.5.3.1.1B for potential adjustments to your baseline fan pressure drop, per the note to Table G3.1.2.9.</span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:navy"> </span></font></p><p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:navy">Regards,</span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:navy">Bill</span></font></p><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p>
</div></div></body></html>