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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'>Paul:<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'>It certainly is a matter of
interpretation, as you say.  Thank you for your clarification.  I am
happy to hear about his ongoing process and would like to know more.  It
does seem that more open discussion is needed to develop the “knowledge
base” of the modeling community.<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'><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'><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'><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'><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'><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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face="Times New Roman"><span style='font-size:12.0pt'>

<hr size=2 width="100%" align=center tabindex=-1>

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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'> Paul Erickson
[mailto:perickson@aeieng.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, August 18, 2010
4:37 PM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">Kevin
 Kyte</st1:PersonName>; <st1:PersonName w:st="on">Bishop, Bill</st1:PersonName>;
<st1:PersonName w:st="on">bldg-sim@lists.onebuilding.org</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [Bldg-sim] Appendix
G. laboratory spaces with minimum 5000 cfm exhaust</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>

<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Kevin, <o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;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;font-family:Calibri;color:#1F497D'>I would suggest that
the large loop hole created between G3.1.2.10 (itself and exception h) and your
interpretation of G3.1.1 (exception d) does not seem synchronous with the
trajectory of 90.1 and ASHRAE’s overall goal of reducing energy use in
buildings.  As I mentioned in my previous post, a few of us (AEI, ASHRAE,
Labs21, and NREL)  began a dialogue about this in January hoping to get
published clarity via the 90.1 Continuous Maintenance process.  The timing
of our comments happened to coincide with committee voting already in progress
and no clarification was made.  However, it was discussed that the intent
is that the 5000 CFM minimum is in reference to System exhaust rates, not the
exhaust rates of a single Space.<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;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;font-family:Calibri;color:#1F497D'>If we’re not
careful and professionally discerning about loopholes like this one (many of
which have thankfully been closed due to the efforts of various groups and
volunteers through the CM process and committee participation) we are
perpetuating the very type of modeling that has led to modeled vs. actual
energy discrepancies that have brought so much critique in recent years.  <o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;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;font-family:Calibri;color:#1F497D'>Perhaps your
perspective is shared by others and an open discussion on the topic would serve
the modeling community well.  Thanks for chiming in.<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><br>
Regards,<br>
Paul<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>

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 <tr>
  <td width=167 valign=top style='width:125.25pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><font
  size=2 color="#660000" face=Calibri><span style='font-size:10.0pt;font-family:
  Calibri;color:#660000;text-transform:uppercase;font-weight:bold'>Paul
  Erickson</span></font></b><b><font size=1 color="#333333" face=Calibri><span
  style='font-size:9.0pt;font-family:Calibri;color:#333333;font-weight:bold'> 
  </span></font></b><font size=1 color="#333333" face=Calibri><span
  style='font-size:9.0pt;font-family:Calibri;color:#333333'>LEED® AP <br>
  </span></font><font size=2 color="#1f497d" face=Calibri><span
  style='font-size:10.0pt;font-family:Calibri;color:#1F497D;text-transform:
  uppercase'>SR. Sustainable Design COnsultant</span></font><font size=1
  color="#333333" face=Calibri><span style='font-size:9.0pt;font-family:Calibri;
  color:#333333'><o:p></o:p></span></font></p>
  </td>
  <td width=10 valign=top style='width:7.5pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font size=1 color="#333333" face=Calibri><span
  style='font-size:9.0pt;font-family:Calibri;color:#333333'> <o:p></o:p></span></font></p>
  </td>
  <td width=283 valign=top style='width:212.25pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><font
  size=1 color="#660000" face=Calibri><span style='font-size:9.0pt;font-family:
  Calibri;color:#660000;font-weight:bold'>AEI</span></font></b><font size=1
  color="#333333" face=Calibri><span style='font-size:9.0pt;font-family:Calibri;
  color:#333333'> | AFFILIATED ENGINEERS, INC.  <br>
<st1:Street w:st="on"><st1:address w:st="on">5802 Research Park Blvd.</st1:address></st1:Street>
  | <st1:place w:st="on"><st1:City w:st="on">Madison</st1:City>, <st1:State
   w:st="on">WI</st1:State>  <st1:PostalCode w:st="on">53719</st1:PostalCode></st1:place><br>
  <br>
  </span></font><font size=1 color="#660000" face=Calibri><span
  style='font-size:9.0pt;font-family:Calibri;color:#660000'>P: 608.236.1112 |
  F: 608.238.2614</span></font><font size=1 color="#333333" face=Calibri><span
  style='font-size:9.0pt;font-family:Calibri;color:#333333'>  <br>
  </span></font><font size=1 color="#660000" face=Calibri><span
  style='font-size:9.0pt;font-family:Calibri;color:#660000'><a
  href="mailto:perickson@aeieng.com"><font color="#660000"><span
  style='color:#660000;text-decoration:none'>perickson@aeieng.com</span></font></a> 
  |  <b><span style='font-weight:bold'><a href="http://www.aeieng.com/"><font
  color="#660000"><span style='color:#660000;text-decoration:none'>www.aeieng.com</span></font></a></span></b></span></font><font
  size=1 color="#333333" face=Calibri><span style='font-size:9.0pt;font-family:
  Calibri;color:#333333'>  <o:p></o:p></span></font></p>
  </td>
 </tr>
</table>

<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>

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<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><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-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b><st1:PersonName w:st="on">Kevin Kyte</st1:PersonName><br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, August 18, 2010
3:10 PM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">Bishop,
 Bill</st1:PersonName>; <st1:PersonName w:st="on">bldg-sim@lists.onebuilding.org</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Bldg-sim] Appendix
G. laboratory spaces with minimum 5000 cfm exhaust<o:p></o:p></span></font></p>

</div>

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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><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>

<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>The answer is in the question, “For
laboratory spaces…”<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'>Kevin<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'><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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<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>

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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'> <st1:PersonName
w:st="on">Bishop, Bill</st1:PersonName> [mailto:wbishop@pathfinder-ea.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, August 18, 2010
2:42 PM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">bldg-sim@lists.onebuilding.org</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> [Bldg-sim] Appendix G.
laboratory spaces with minimum 5000 cfm exhaust</span></font><o:p></o:p></p>

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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><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 baseline HVAC system type, ASHRAE 90.1-2007 has the
following exception (G3.1.1 d.):<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 laboratory spaces with a minimum of 5000 cfm of
exhaust, use system type 5 or 7 that reduce the exhaust or makeup air volume to
50% of design values during unoccupied periods.”<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Similarly, “systems serving laboratories with exhaust
rates of 5000 cfm or greater” are excepted from the baseline energy
recovery requirement (G3.1.2.10 h.).<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'>When applying this exception, is it 5000 cfm per space? Per
floor? Per building? Per system?<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'>Thanks,<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Bill<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><st1:place w:st="on"><st1:City w:st="on"><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'>William</span></font></b></st1:City><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'>
 <st1:State w:st="on">Bishop</st1:State>, <st1:State w:st="on">PE</st1:State></span></font></b></st1:place><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'>,
BEMP, LEED<sup>®</sup> AP </span></font></b><b><font size=2 color="#006600"
face="Franklin Gothic Medium Cond"><span style='font-size:10.0pt;font-family:
"Franklin Gothic Medium Cond";color:#006600;font-weight:bold'>|</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'>
Pathfinder Engineers & Architects 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'>Mechanical Engineer<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
5.0pt;font-family:Arial;color:black'><o:p> </o:p></span></font></p>

<p class=MsoNormal><st1:Street w:st="on"><st1:address w:st="on"><font size=1
  face=Arial><span style='font-size:9.0pt;font-family:Arial'>134 South Fitzhugh
  Street</span></font></st1:address></st1:Street><font size=1><span
style='font-size:9.0pt'><br>
</span></font><st1:place w:st="on"><st1:City w:st="on"><font size=1 face=Arial><span
  style='font-size:9.0pt;font-family:Arial'>Rochester</span></font></st1:City><font
 size=1 face=Arial><span style='font-size:9.0pt;font-family:Arial'>, <st1:State
 w:st="on">NY</st1:State> <st1:PostalCode w:st="on">14608</st1:PostalCode></span></font></st1:place><font
size=1><span style='font-size:9.0pt'><br>
</span></font><font size=1 face=Arial><span style='font-size:9.0pt;font-family:
Arial'>T: (585) 325-6004 <font color=black><span style='color:black'>Ext. 114</span></font></span></font><font
size=1><span style='font-size:9.0pt'><br>
</span></font><font size=1 face=Arial><span style='font-size:9.0pt;font-family:
Arial'>F: (585) 325-6005<font color=black><span style='color:black'><o:p></o:p></span></font></span></font></p>

<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:black'>wbishop@pathfinder-ea.com<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'>www.pathfinder-ea.com</span></font><o:p></o:p></p>

<p class=MsoNormal><font size=5 color=green face=Webdings><span
style='font-size:18.0pt;font-family:Webdings;color:green'>P</span></font><font
color=green><span style='color:green'> </span></font><font size=1 color=green><span
style='font-size:7.5pt;color:green'>Sustainability – less is more.</span></font><font
color=green><span style='color:green'><o:p></o:p></span></font></p>

<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>

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