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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Bill,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><br>
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></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hope that helps.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Paul<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#660000;
text-transform:uppercase'>Paul Erickson</span></b><b><span style='font-size:
9.0pt;font-family:"Calibri","sans-serif";color:#333333'> </span></b><span
style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333'>LEED®
AP <br>
</span><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#1F497D;text-transform:uppercase'>SR. Sustainable Design COnsultant</span><span
style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333'><o:p></o:p></span></p>
</td>
<td width=10 valign=top style='width:7.5pt;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";
color:#333333'> <o:p></o:p></span></p>
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<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><span
style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#660000'>AEI</span></b><span
style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333'> |
AFFILIATED ENGINEERS, INC. <br>
5802 Research Park Blvd. | Madison, WI 53719<br>
<br>
</span><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";
color:#660000'>P: 608.236.1112 | F: 608.238.2614</span><span
style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333'> <br>
</span><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";
color:#660000'><a href="mailto:perickson@aeieng.com"><span style='color:#660000;
text-decoration:none'>perickson@aeieng.com</span></a> | </span><b><span
style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#660000'><a
href="http://www.aeieng.com/"><span style='color:#660000;text-decoration:
none'>www.aeieng.com</span></a></span></b><span style='font-size:9.0pt;
font-family:"Calibri","sans-serif";color:#333333'> <o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Bishop,
Bill<br>
<b>Sent:</b> Wednesday, August 18, 2010 1:42 PM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Bldg-sim] Appendix G. laboratory spaces with minimum 5000 cfm
exhaust<o:p></o:p></span></p>
</div>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>For
baseline HVAC system type, ASHRAE 90.1-2007 has the following exception (G3.1.1
d.):<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>“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></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>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></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>When
applying this exception, is it 5000 cfm per space? Per floor? Per building? Per
system?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Bill<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond","sans-serif";
color:black'>William Bishop, PE, BEMP, LEED<sup>®</sup> AP </span></b><b><span
style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond","sans-serif";
color:#006600'>|</span></b><b><span style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond","sans-serif";
color:black'> </span></b><b><span style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond","sans-serif";
color:black'>Pathfinder Engineers & Architects LLP</span></b><b><span
style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond","sans-serif";
color:black'><o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:black'>Mechanical Engineer<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:5.0pt;font-family:"Arial","sans-serif";
color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif"'>134
South Fitzhugh Street</span><span style='font-size:9.0pt'><br>
</span><span style='font-size:9.0pt;font-family:"Arial","sans-serif"'>Rochester,
NY 14608</span><span style='font-size:9.0pt'><br>
</span><span style='font-size:9.0pt;font-family:"Arial","sans-serif"'>T: (585)
325-6004 <span style='color:black'>Ext. 114</span></span><span
style='font-size:9.0pt'><br>
</span><span style='font-size:9.0pt;font-family:"Arial","sans-serif"'>F: (585)
325-6005</span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:black'>wbishop@pathfinder-ea.com<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:black'>www.pathfinder-ea.com</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:18.0pt;font-family:Webdings;
color:green'>P</span><span style='color:green'> </span><span style='font-size:
7.5pt;color:green'>Sustainability – less is more.</span><span style='color:
green'><o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
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