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<p class=MsoNormal><font size=2 color=blue face=Calibri><span style='font-size:
11.0pt;color:blue'>Although this has low chance, but if you are still under
V2/90.1-2004, depending on your area, economizer might not be required based
upon the square footage the system serves. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face=Calibri><span style='font-size:
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<p class=MsoNormal><b><font size=2 color=blue face="Clarendon Cd"><span
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"Clarendon Cd";color:blue;font-weight:bold'> Office (614) 448-1498<o:p></o:p></span></font></b></p>
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<p class=MsoNormal><b><font size=1 color=blue face=Calibri><span lang=SV
style='font-size:7.5pt;color:blue;font-weight:bold'>Thank you</span></font></b><b><font
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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'> Bishop, Bill
[mailto:wbishop@pathfinder-ea.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, July 13, 2011
9:09 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Jansen, Connor;
equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Equest-users] In
Appendix G comparisons are air sideeconomizersrequired in IDF/Electrical Rooms</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 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;color:#1F497D'>Hi Connor,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;color:#1F497D'>Since G3.1.2.6 already lists the
exceptions that apply to the economizer requirement, I don’t think you
should try to claim additional exceptions based on the Prescriptive Path
Section 6.5. While I agree that it might be unreasonable to expect an owner to
install an economizer on a small PSZ unit, the Appendix G Baseline requirements
do not necessarily represent what an owner would typically do. The flip side of
your situation is that a zone with a low cooling capacity should not penalize your
Proposed design too badly if the Baseline has an economizer but the Proposed
doesn’t. You can minimize any penalty by using a higher cooling T-stat
setpoint in both models (assuming your electrical room is not to be kept at
comfort conditions).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;color:#1F497D'>Regards,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;color:#1F497D'>Bill<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;color:#1F497D'><img border=0 width=486 height=116
id="_x0000_i1026" src="cid:image001.jpg@01CC417C.D7D56B60"
alt="Senior Energy Engineer"><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></font></p>
<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;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Jansen, Connor<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, July 12, 2011 4:04
PM<br>
<b><span style='font-weight:bold'>To:</span></b> equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Equest-users] In
Appendix G comparisons are air side economizersrequired in IDF/Electrical Rooms<o:p></o:p></span></font></p>
</div>
</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'>When
performing a 90.1 2007 Appendix G energy model, the baseline system for the
building appears to call for a packaged single zone air handler and an airside
economizer for individual IDF and Electrical rooms. The proposed systems are
designed as FCUs. Although not addressed in Appendix G, section 6.5.1, would
appear to exempt the airside economizers in rooms requiring a low cooling
capacity. <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'>With
that said, is it correct to reference other parts of ASHRAE 90.1 (prescriptive
path Sec 6.5) when performing a performance based Appendix G energy cost
comparison?<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'>Your
help and clarification would be much appreciated. I apologize if this is not
the correct forum for this post and would be greatly obliged if you were to
direct me to the correct forum.<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'>Regards,<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'>Connor<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'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=1 color="#498871" face=Arial><span
style='font-size:9.0pt;font-family:Arial;color:#498871;font-weight:bold'>Connor
<st1:place w:st="on"><st1:City w:st="on">Jansen</st1:City>, <st1:State w:st="on">PE</st1:State></st1:place></span></font></b><font
color="#1f497d" face=Arial><span style='font-family:Arial;color:#1F497D'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color="#498871" face=Arial><span
style='font-size:9.0pt;font-family:Arial;color:#498871'>Built Ecology
Specialist</span></font><font color="#1f497d" face=Arial><span
style='font-family:Arial;color:#1F497D'><o:p></o:p></span></font></p>
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<p class=MsoNormal><st1:Street w:st="on"><st1:address w:st="on"><font size=1
color=black face=Arial><span style='font-size:8.0pt;font-family:Arial;
color:black'>405 Howard Street</span></font></st1:address></st1:Street><font
size=1 color=black face=Arial><span style='font-size:8.0pt;font-family:Arial;
color:black'><o:p></o:p></span></font></p>
<p class=MsoNormal><st1:address w:st="on"><st1:Street w:st="on"><font size=1
color=black face=Arial><span style='font-size:8.0pt;font-family:Arial;
color:black'>Suite</span></font></st1:Street><font size=1 color=black
face=Arial><span style='font-size:8.0pt;font-family:Arial;color:black'> 500</span></font></st1:address><font
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<o:p></o:p></span></font></p>
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color=black face=Arial><span style='font-size:8.0pt;font-family:Arial;
color:black'>San Francisco</span></font></st1:City><font size=1
color=black face=Arial><span style='font-size:8.0pt;font-family:Arial;
color:black'> <st1:State w:st="on">CA</st1:State> <st1:PostalCode w:st="on">94105</st1:PostalCode></span></font></st1:place><font
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<p class=MsoNormal><font size=1 color="#8cb4a1" face=Arial><span
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color:black'>+1 415 398 3833<o:p></o:p></span></font></p>
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Arial;color:#1F497D'> </span></font><font size=1 color=black
face=Arial><span style='font-size:8.0pt;font-family:Arial;color:black'>+1 415
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color:#8CB4A1'>E</span></font><font size=1 color=navy face=Arial><span
style='font-size:7.0pt;font-family:Arial;color:navy'>.</span></font><font
size=1 color=navy face=Arial><span style='font-size:8.0pt;font-family:Arial;
color:navy'> </span></font><font size=1 color=black face=Arial><span
style='font-size:8.0pt;font-family:Arial;color:black'><a
href="mailto:connor.jansen@wspfk.com"><font color=black><span
style='color:black'>connor.jansen@wspfk.com</span></font></a><o:p></o:p></span></font></p>
<p class=MsoNormal align=right style='text-align:right'><font size=1
color="#8cb4a1" face=Arial><span style='font-size:7.0pt;font-family:Arial;
color:#8CB4A1'>W.</span></font><font size=1 color=black face=Arial><span
style='font-size:8.0pt;font-family:Arial;color:black'> <a
href="http://www.built-ecology.com/"><font color=black><span
style='color:black'>built-ecology.com</span></font></a></span></font><font
size=1 color=navy face=Arial><span style='font-size:8.0pt;font-family:Arial;
color:navy'><o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:black'><img border=0 width=83 height=110
id="Picture_x005f_x0020_1" src="cid:image002.gif@01CC417C.D7D56B60"
alt="Description: built-ecology"></span></font><font color=navy face=Arial><span
style='font-family:Arial;color:navy'><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'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=1 color="#969696" face=Arial><span
style='font-size:8.0pt;font-family:Arial;color:#969696'>A specialist service of
WSP Flack + Kurtz<o:p></o:p></span></font></p>
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