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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hi, Bill,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>My understanding agrees with Gail’s.
I only need to mention one more thing in your statement. I do not think
the Appendix G limits you to use only one single packaged rooftop VAV system to
do the job. You may use a few units of the same type based on the
building situation, and you are permitted to use a few constant flow roof tops
if a certain exception met. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Shawn Lee<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Beardsley Design Associates <o:p></o:p></span></font></p>
<p class=MsoNormal><st1:place w:st="on"><st1:City w:st="on"><font size=2
color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>Aurburn</span></font></st1:City><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'>, <st1:State
w:st="on">NY</st1:State></span></font></st1:place><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<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'>
BLDG-SIM@gard.com [mailto:BLDG-SIM@gard.com] <b><span style='font-weight:bold'>On
Behalf Of </span></b>gail<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, December 12, 2006
2:43 PM<br>
<b><span style='font-weight:bold'>To:</span></b> BLDG-SIM@gard.com<br>
<b><span style='font-weight:bold'>Subject:</span></b> [BLDG-SIM] System Type in
Appendix G</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi Bill,<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Your interpretation is the correct interpretation. This is
specific to Appendix G (the Performance Rating Method), and does not impact
basic code compliance (the Energy Cost Budget Method from Chapter 11).<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I expect the change was made in order to encourage the selection of
more efficient system types for various buildings. With the energy cost
budget method, buildings that select inherently efficient system types are not
credited for this selection because the Baseline case moves with the Proposed
case. Similarly, buildings that select inherently inefficient system
types are not penalized for this selection. Appendix G attempts to
correct this by <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>You are correct that the number of systems modeled in the baseline
building may be high.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Gail Stranske<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>CTG Energetics, Inc.<br>
<br>
<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><span class=gmailquote><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>On 12/12/06, <b><span style='font-weight:bold'>Bill
Talbert</span></b> <<a href="mailto:btalbert@aeieng.com">btalbert@aeieng.com</a>>
wrote:</span></font></span> <o:p></o:p></p>
<div style='margin-left:3.0pt;margin-top:3.0pt;margin-right:3.0pt;margin-bottom:
.75pt'>
<div>
<p class=MsoNormal><font size=1 face=Arial><span style='font-size:8.0pt;
font-family:Arial'>All,<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=1 face=Arial><span style='font-size:8.0pt;
font-family:Arial'>I'm working on a LEED energy analysis for a small healthcare
clinic project (~15K sqft). According to A90.1-2004 Appendix G, Table
G3.1.1A, the baseline HVAC system for a nonresidential building with
<=3 floors, <75K sqft, and fossil fuel heating should be a packaged
single zone system with DX cooling and a gas-fired furnace for heating. This
seems like a big departure from the baseline system types indicated in the ECB
method. Is this a correct interpretation? If so, can anyone provide feedback as
to why this change was made? It seems as though many buildings of this
size would utilize a packaged rooftop VAV. Also, it potentially
makes the number of systems necessary in the baseline building significantly
high unless the thermal blocks are simplified in the proposed design model. <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=1 face=Arial><span style='font-size:8.0pt;
font-family:Arial'>Thanks,<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=1 face=Arial><span style='font-size:8.0pt;
font-family:Arial'>Bill Talbert, LEED AP<br>
Mechanical Engineer<br>
Phone: (608) 441-6677<br>
<br>
<br>
<br>
<o:p></o:p></span></font></p>
</div>
<pre><font size=2 face="Courier New"><span style='font-size:10.0pt'>======================================================<o:p></o:p></span></font></pre><pre><font
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