<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:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40"
xmlns:ns0="http://schemas.microsoft.com/office/2004/12/omml">
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (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]--><o:SmartTagType
namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PostalCode"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="State"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="City"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="place"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="Street"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="address"/>
<!--[if !mso]>
<style>
st1\:*{behavior:url(#default#ieooui) }
</style>
<![endif]-->
<style>
<!--a:link
{mso-style-priority:99;}
span.MSOHYPERLINK
{mso-style-priority:99;}
a:visited
{mso-style-priority:99;}
span.MSOHYPERLINKFOLLOWED
{mso-style-priority:99;}
/* Font Definitions */
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:Calibri;}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
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";}
span.EmailStyle17
{mso-style-type:personal;
font-family:Calibri;
color:windowtext;}
span.EmailStyle20
{mso-style-type:personal-reply;
font-family:Arial;
color:windowtext;
font-weight:normal;
font-style:normal;
text-decoration:none none;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.Section1
{page:Section1;}
-->
</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=Section1>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Marty,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The equations in Section G3.1.2.9 and Table G3.1.2.9 are
only for the baseline building. For the baseline building, the supply CFM is
used to model the efficiency of all of the fans in the building based on
assumptions about minimum design characteristics. If you are using the
equations, you should use the Supply CFM for the system, run through the
equations in Table G3.1.2.9 to determine the BHP for the baseline, then run
that through the equation in G3.1.2.9 to determine total fan power in kW. That
value can then be input into Trace for fan power.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>For the proposed building, you should use the actual rated
fan kW based on the fan power curve for your CFM and the fans specified.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>As Bob stated, Trace does have an option where it will do
the conversions for the baseline building, but I typically have not used it. I
shy away from the “black boxes” in energy modeling when putting
things together for a LEED review team since ANYTHING is up for grabs when they
review the credit and if I can’t explain a black box process they may
deny the entire credit.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><strong><b><font size=2 color="#c75b12" face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:#C75B12'>JEREMY R. POLING, PE,
LEED AP</span></font></b></strong><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><br>
</span></font><font size=1 color=gray face=Arial><span style='font-size:8.0pt;
font-family:Arial;color:gray'>Senior Sustainability Analyst<br>
Strategic Services<br>
<i><span style='font-style:italic'>Site Solutions | Operations |
Sustainability</span></i></span></font><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><br>
<br>
<strong><b><font color="#c75b12" face=Arial><span style='font-family:Arial;
color:#C75B12'>EPSTEIN</span></font></b></strong><br>
</span></font><font size=1 color=gray face=Arial><span style='font-size:8.0pt;
font-family:Arial;color:gray'>Architecture<br>
Interiors<br>
Engineering<br>
Construction</span></font><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><br>
</span></font><font size=1 face=Arial><span style='font-size:8.0pt;font-family:
Arial'><br>
<st1:Street w:st="on"><st1:address w:st="on"><font color=gray><span
style='color:gray'>600 <u1:address u2:st="on"><u1:Street u2:st="on">West
Fulton Street</u1:Street></span></font></st1:address></st1:Street><font
color=gray><span style='color:gray'><br>
<u1:City u2:st="on"><st1:place w:st="on"><st1:City w:st="on">Chicago</u1:City></st1:City>,
<u1:State u2:st="on"><st1:State w:st="on">Illinois</u1:State></st1:State> <u1:PostalCode u2:st="on"><st1:PostalCode
w:st="on">60661-1259</u1:PostalCode></u1:address></st1:PostalCode></st1:place></span></font></span></font><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><br>
</span></font><font size=1 face=Arial><span style='font-size:8.0pt;font-family:
Arial'><br>
<strong><b><font color="#c75b12" face=Arial><span style='font-family:Arial;
color:#C75B12'>D:</span></font></b></strong> <font color=gray><span
style='color:gray'>(312) 429-8152</span></font><br>
<strong><b><font color="#c75b12" face=Arial><span style='font-family:Arial;
color:#C75B12'>F:</span></font></b></strong> <font color=gray><span
style='color:gray'>(312) 559-1217</span></font><br>
<strong><b><font color="#c75b12" face=Arial><span style='font-family:Arial;
color:#C75B12'>C:</span></font></b></strong> <font color=gray><span
style='color:gray'>(312) 504-5905<br>
</span></font><strong><b><font color="#c75b12" face=Arial><span
style='font-family:Arial;color:#C75B12'>E:</span></font></b></strong> <font
color=gray><span style='color:gray'><a href="mailto:jpoling@epsteinglobal.com"><font
color=gray><span style='color:gray'>jpoling@epsteinglobal.com</span></font></a></span></font><br>
<strong><b><font color="#c75b12" face=Arial><span style='font-family:Arial;
color:#C75B12'>W:</span></font></b></strong> <font color=gray><span
style='color:gray'><a href="http://www.epsteinglobal.com/"><font color=gray><span
style='color:gray'>www.epsteinglobal.com</span></font></a></span></font></span></font><font
size=1 face=Arial><span style='font-size:9.0pt;font-family:Arial'><br>
</span></font><font size=1 face=Arial><span style='font-size:8.0pt;font-family:
Arial'><br>
<strong><b><i><font color=green face=Arial><span style='font-family:Arial;
color:green;font-style:italic'>Epstein is a firm believer in sustainability. We
ask that you please consider the environment before printing this e-mail.</span></font></i></b></strong></span></font><i><font
face=Arial><span style='font-family:Arial;font-style:italic'><o:p></o:p></span></font></i></p>
</div>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
trace-users-bounces@lists.onebuilding.org
[mailto:trace-users-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Snarski, Marty<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, October 27, 2009
1:33 PM<br>
<b><span style='font-weight:bold'>To:</span></b>
trace-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Trace-users] Appendix G
Fan Energy</span></font><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>Hello,
all.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>I'm
running an energy model (for LEED), and am having a particular problem with the
Fan Energy results. I am using the actual fan horsepower (for the supply
and for the return fans) for the proposed building, and the Appendix G equation
in G3.1.2.9. The results I'm getting for the proposed design are
considerably higher (about 31%) than the baseline building. This leads me
to believe that I may be misinterpreting the equation. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>As
stated in the 90.1 Users manual, the equation accounts for supply, return,
relief, and exhaust fans. However, I've been simply inputting the Supply
CFM into the equation. Given that it accounts for all fans, should I use
the accumulated CFMs for each of those fans (i.e. if I'm supplying 32,000, and
returning 24,000, should I use 56,000 cfm)?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>While
I understand TRACE has the automatic baseline fan sizing capability, I'm not
sure I trust it completely, and would like to know where the calculation comes
from.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>Thanks
for any help you can offer!<o:p></o:p></span></font></p>
<p><font size=1 face=Arial><span style='font-size:9.0pt;font-family:Arial'>NOTICE<span
class=grame>:</span><br>
This e-mail transmission is intended only for the use of the individual or
entity named above and may contain information that is confidential,
privileged, and/or exempt from disclosure under applicable law. If you are not
the intended recipient, you are hereby notified that any review, disclosure,
copying, distribution, or other use of any of the information contained in this
transmission is strictly prohibited. If you have received this transmission in
error, please immediately notify the sender by e-mail at the above address and
delete it from your computer system; you should not copy the message or
disclose its contents to anyone. The content of the message and or attachments
may not reflect the view and opinions of the originating company or any party
it is representing. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:11.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
</div>
</body>
</html>