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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Kevin, <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'>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, </span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>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'>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></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'>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></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><br>
Regards,<br>
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>
</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><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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<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<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>Kevin Kyte<br>
<b>Sent:</b> Wednesday, August 18, 2010 3:10 PM<br>
<b>To:</b> Bishop, Bill; bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] Appendix G. laboratory spaces with minimum 5000
cfm exhaust<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Bill:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>The answer is in the question, “For laboratory
spaces…”<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Kevin<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<div>
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<hr size=2 width="100%" align=center>
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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"'> Bishop, Bill
[mailto:wbishop@pathfinder-ea.com] <br>
<b>Sent:</b> Wednesday, August 18, 2010 2:42 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</span><o:p></o:p></p>
</div>
<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'> Pathfinder Engineers & Architects LLP<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 style='color:black'><o:p></o:p></span></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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