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<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Greg,<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'>I think you need to add DX cooling to your
proposed design, and energy recovery to your baseline. Table G3.1 10<span
class=GramE>.(</span>d) states that, “where no cooling system exists or
no cooling system has been specified, the [proposed] cooling system shall be
identical to the system modeled in the <i style='mso-bidi-font-style:normal'><span
style='font-style:italic;mso-bidi-font-style:normal'>baseline building design</span></i>.”
See G3.1.2.10 Exhaust Air Energy Recovery to determine if it is required or
not. I believe you meet the 5000 <span class=SpellE>cfm</span> supply air and
70% OA criteria. Make sure none of the exceptions apply.<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'>Regards,<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'>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>
<div>
<p class=MsoNormal><b><font size=2 color=black face="Franklin Gothic Medium"><span
style='font-size:10.0pt;font-family:"Franklin Gothic Medium";color:black;
font-weight:bold;mso-no-proof:yes'>William Bishop</span></font></b><b><font
size=2 color=black face="Franklin Gothic Medium Cond"><span style='font-size:
10.0pt;font-family:"Franklin Gothic Medium Cond";color:black;font-weight:bold;
mso-no-proof:yes'>, EIT, LEED<sup>®</sup> AP</span></font></b><b><font
size=2 color="#003300" face="Franklin Gothic Medium Cond"><span
style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond";color:#003300;
font-weight:bold;mso-no-proof:yes'> </span></font></b><b><font size=2
color=green face="Franklin Gothic Medium Cond"><span style='font-size:10.0pt;
font-family:"Franklin Gothic Medium Cond";color:green;font-weight:bold;
mso-no-proof:yes'>|</span></font></b><b><font size=2 color="#003300"
face="Franklin Gothic Medium Cond"><span style='font-size:10.0pt;font-family:
"Franklin Gothic Medium Cond";color:#003300;font-weight:bold;mso-no-proof:yes'>
</span></font></b><b><font size=2 color=black face="Franklin Gothic Medium Cond"><span
style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond";color:black;
font-weight:bold;mso-no-proof:yes'>Pathfinder Engineers LLP<o:p></o:p></span></font></b></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:black;mso-no-proof:yes'>Mechanical Engineer<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
3.0pt;mso-bidi-font-size:9.0pt;font-family:Arial;color:black;mso-no-proof:yes'><o:p> </o:p></span></font></p>
<p class=MsoNormal><st1:address w:st="on"><st1:address w:st="on"><st1:Street
w:st="on"><font size=1 color="#4864a7" face=Arial><span style='font-size:
9.0pt;font-family:Arial;mso-no-proof:yes'>134 South Fitzhugh Street</span></font></st1:Street></st1:address><font
size=1><span style='font-size:9.0pt;mso-no-proof:yes'><br>
</span></font><st1:City w:st="on"><font size=1 face=Arial><span
style='font-size:9.0pt;font-family:Arial;mso-no-proof:yes'>Rochester</span></font></st1:City><font
size=1 face=Arial><span style='font-size:9.0pt;font-family:Arial;mso-no-proof:
yes'>, <st1:State w:st="on">NY</st1:State> <st1:PostalCode w:st="on">14608</st1:PostalCode></span></font></st1:address><font
size=1><span style='font-size:9.0pt;mso-no-proof:yes'><br>
</span></font><font size=1 face=Arial><span style='font-size:9.0pt;font-family:
Arial;mso-no-proof:yes'>T: (585) 325-6004 </span></font><font size=1
color=black face=Arial><span style='font-size:9.0pt;font-family:Arial;
color:black;mso-no-proof:yes'>Ext. 114</span></font><font size=1><span
style='font-size:9.0pt;mso-no-proof:yes'><br>
</span></font><font size=1 face=Arial><span style='font-size:9.0pt;font-family:
Arial;mso-no-proof:yes'>F: (585) 325-6005</span></font><font size=1
color=black face=Arial><span style='font-size:9.0pt;mso-bidi-font-size:12.0pt;
font-family:Arial;color:black;mso-no-proof:yes'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:black;mso-no-proof:yes'><a
href="bbishop@pathfinderengineers.com">bbishop@pathfinderengineers.com</a><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
3.0pt;mso-bidi-font-size:9.0pt;font-family:Arial;color:black;mso-no-proof:yes'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
9.0pt;mso-bidi-font-size:12.0pt;font-family:Arial;color:black;mso-no-proof:
yes'>www.pathfinderengineers.com</span></font><font color=navy
face="Times New Roman"><span style='font-family:"Times New Roman";color:navy;
mso-no-proof:yes'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=5 color=green face=Webdings><span
style='font-size:18.0pt;font-family:Webdings;mso-bidi-font-family:Webdings;
color:green;mso-no-proof:yes'>P</span></font><font color=green><span
style='color:green;mso-no-proof:yes'> </span></font><font size=1 color=green><span
style='font-size:7.5pt;color:green;mso-no-proof:yes'>Please strive to live
sustainably.</span></font><font color=green><span style='color:green'><o:p></o:p></span></font></p>
</div>
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<p class=MsoNormal><b><font size=2 color=black face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight:bold'>From:</span></font></b><font
size=2 color=black face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:windowtext'> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Greg Schlegel<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, March 19, 2009
7:39 PM<br>
<b><span style='font-weight:bold'>To:</span></b> bldg-sim@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Bldg-sim] Modeling a
natatorium using Appendix G and eQUEST</span></font><font color=black
face="Times New Roman"><span style='font-family:"Times New Roman";color:windowtext'><o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 color="#4864a7" face=Calibri><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:10.0pt;color:#1F497D'>We’re working on a building that
has a large natatorium.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:10.0pt;color:#1F497D'>The project is located in <st1:State
w:st="on"><st1:place w:st="on">Utah</st1:place></st1:State> so we can use
outside air for dehumidification. There is no mechanical cooling in the
as-designed system.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:10.0pt;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:10.0pt;color:#1F497D'>Per Appendix G, it appears that the
baseline system should be a packaged single zone unit with a fossil fuel
furnace for heating, an air side economizer (dry bulb high limit of 75 F), and
DX cooling. We’re controlling the space temp at 88 F and the
relative humidity between 40-60%. The baseline system would run as a
constant volume unit with a minimum ventilation air requirement of 0.5 cfm/sf
(~15,000 cfm). <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:10.0pt;color:#1F497D'>The Appendix G baseline system has a
considerable dehumidification load – which shows up as a cooling energy.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:10.0pt;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:10.0pt;color:#1F497D'>The as designed system is a heating only
unit with an air side economizer and heat recovery. The system uses
outside air to dehumidify instead of a DX coil (<st1:State w:st="on"><st1:place
w:st="on">Utah</st1:place></st1:State> has a very dry climate). Space
conditions remain the same. We’ve modeled this system by increasing
the amount of ventilation air delivered to the space until the relative
humidity in the space is between roughly 40 and 60%. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:10.0pt;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:10.0pt;color:#1F497D'>The results show a large electric fan
penalty (due to the pressure drop across the heat recovery), a large amount of
heating savings (from the heat recovery), and a large amount of cooling
savings, since we’re now using OA, heat recovery and natural gas to
dehumidify the space instead of electricity.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:10.0pt;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:10.0pt;color:#1F497D'>Is this a reasonable approach per the
Appendix G modeling methodology? It seems unreasonable to us that we
should be able to claim the cooling/dehumidification savings, but per Appendix
G this seems to be the case. I would welcome any and all thoughts and
feedback.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:10.0pt;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:10.0pt;color:#1F497D'>Thanks.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:10.0pt;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face="Arial Narrow"><span
style='font-size:10.0pt;font-family:"Arial Narrow";color:#1F497D'>Greg Schlegel</span></font><font
color="#1f497d" face="Times New Roman"><span style='font-family:"Times New Roman";
color:#1F497D'><br>
</span></font><i><font size=1 color="#1f497d" face="Arial Narrow"><span
style='font-size:7.5pt;font-family:"Arial Narrow";color:#1F497D;font-style:
italic'>Energy Analyst, PE, LEED-AP</span></font></i><font color="#1f497d"
face="Times New Roman"><span style='font-family:"Times New Roman";color:#1F497D'>
<br>
</span></font><font size=1 color="#1f497d" face=Arial><span style='font-size:
7.5pt;font-family:Arial;color:#1F497D'><img border=0 width=209 height=54
id="Picture_x005f_x0020_1" src="cid:image002.jpg@01C9A938.1593A4B0"
alt="cid:125410401@15112007-188C"><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color="#1f497d" face="Times New Roman"><span
style='font-size:12.0pt;font-family:"Times New Roman";color:#1F497D'> </span></font><font
size=1 color="#1f497d" face="Times New Roman"><span style='font-size:7.5pt;
font-family:"Times New Roman";color:#1F497D'>----------------------------------------------------------------------------------------</span></font><font
color="#1f497d" face="Times New Roman"><span style='font-family:"Times New Roman";
color:#1F497D'><br>
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