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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>This is good to know because I know in the past USGBC did not
allow it. I think it makes more sense now that they have gotten the OK from
ASHRAE.<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<div>

<p class=MsoNormal><b><span style='font-size:8.5pt;font-family:"Arial","sans-serif";
color:#666666'>ARTURO HERNANDEZ, Mechanical Engineering</span></b><span
style='font-size:8.5pt;font-family:"Arial","sans-serif";color:#666666'><br>
<b>OWP/P | CANNON DESIGN</b><br>
<br>
</span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:green'><o:p></o:p></span></p>

</div>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<div>

<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";
color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Gregg
Liddick<br>
<b>Sent:</b> Tuesday, October 27, 2009 2:30 PM<br>
<b>To:</b> James D. Waechter; bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] Ashrae 90.1 - Unmet hours<o:p></o:p></span></p>

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</div>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal><span style='color:#1F497D'>The USGBC received confirmation
from ASHRAE that it is OK if the baseline unmet load hours exceed the proposed
unmet load hours by more than 50, given that they are both below 300.&nbsp; <o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>Any review comment stating
anything to the contrary was written before the guidance was received and it is
completely acceptable to reply to the review comment with a comment stating it
is OK that the baseline exceeds the proposed by more than 50.<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>Best Regards,<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt'>Gregg Liddick, EIT, LEED<sup>®</sup>
AP</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>&nbsp;<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt'>The Epsten Group, Inc.</span><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt'>429 Edgewood Avenue</span><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt'>Atlanta GA 30312</span><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt'>Phone:&nbsp;404-577-0370&nbsp;
ext. 102</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt'>Fax: 404-577-1739</span><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt'><a
href="http://www.theepstengroup.com" target="_blank"><span style='color:black'>www.theepstengroup.com</span></a></span><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>&nbsp;<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:#00B050'>Please consider
the environment before printing this e-mail.</span><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'>&nbsp;<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:8.0pt'>This transmission is intended
exclusively for the individual or entity to which it is addressed. This
communication may contain information that is confidential, proprietary, privileged
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contractual obligation on behalf of the sender, the sender's employer, or the
employer's parent company, affiliates or subsidiaries.</span><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<div>

<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";
color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>James D.
Waechter<br>
<b>Sent:</b> Tuesday, October 27, 2009 3:26 PM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] Ashrae 90.1 - Unmet hours<o:p></o:p></span></p>

</div>

</div>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal><span style='color:windowtext'>I&#8217;d be very interested
to read up on the previous discussions, but a search of the archive
didn&#8217;t turn up much.&nbsp; <o:p></o:p></span></p>

<p class=MsoNormal><span style='color:windowtext'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='color:windowtext'>90.1-2004, 90.1-2004
User&#8217;s Manual, and 90.1-2007 all use &#8220;exceed&#8221; in this
sentence.&nbsp; I don&#8217;t have a copy of the &#8217;07 User&#8217;s Manual,
but even if it does use the phrasing &#8220;difference of&#8221;, I don&#8217;t
see how USGBC can hold anyone to it; it is not written that way in the
standard.&nbsp; End of discussion. (Just my opinion.)<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:windowtext'><o:p>&nbsp;</o:p></span></p>

<div>

<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Tahoma","sans-serif"'>James
D. Waechter, PE, LEED AP&nbsp;</span><span style='font-size:8.0pt;font-family:
"Tahoma","sans-serif";color:#777777'>&nbsp;</span><span style='font-size:8.0pt;
font-family:"Calibri","sans-serif";color:#777777'>|</span><span
style='font-size:8.0pt;font-family:"Tahoma","sans-serif";color:#777777'>&nbsp; </span><span
style='font-size:8.0pt;font-family:"Tahoma","sans-serif";color:#7F7F7F'>Engineer
II </span><span style='font-size:8.0pt;font-family:"Tahoma","sans-serif";
color:gray'><o:p></o:p></span></p>

<p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"BakerSignet BT";
color:#612A8A'>BEAUDIN GANZE CONSULTING ENGINEERS, INC.<o:p></o:p></span></b></p>

<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Tahoma","sans-serif";
color:gray'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal style='line-height:120%'><b><span style='font-size:8.0pt;
line-height:120%;font-family:"Tahoma","sans-serif";color:#612A8A'>P</span></b><b><span
style='font-size:8.0pt;line-height:120%;font-family:"Tahoma","sans-serif";
color:#96BC58'>&nbsp;</span></b><b><span style='font-size:8.0pt;line-height:
120%;font-family:"Tahoma","sans-serif"'> </span></b><span style='font-size:
8.0pt;line-height:120%;font-family:"Tahoma","sans-serif";color:#5F5F5F'>303.278.3820
x 5246</span><span style='font-size:8.0pt;line-height:120%;font-family:"Tahoma","sans-serif"'>&nbsp;&nbsp;<strong><span
style='font-family:"Tahoma","sans-serif"'>F&nbsp; </span></strong></span><span
style='font-size:8.0pt;line-height:120%;font-family:"Tahoma","sans-serif";
color:#5F5F5F'>303.278.3843</span><span style='font-size:8.0pt;line-height:
120%;font-family:"Tahoma","sans-serif"'>&nbsp; </span><b><span
style='font-size:8.0pt;line-height:120%;font-family:"Tahoma","sans-serif";
color:#612A8A'>W</span></b><span style='font-size:8.0pt;line-height:120%;
font-family:"Tahoma","sans-serif";color:#5F5F5F'> </span><span
style='font-size:8.0pt;line-height:120%;font-family:"Tahoma","sans-serif"'>&nbsp;</span><span
style='font-size:8.0pt;line-height:120%;font-family:"Tahoma","sans-serif";
color:#5A5A5A'><a href="www.bgce.com" title="blocked::www.bgce.com"><span
style='color:#5A5A5A;text-decoration:none'>www.bgce.com</span></a></span><span
style='font-size:8.0pt;line-height:120%;font-family:"Tahoma","sans-serif";
color:#5F5F5F'>&nbsp; </span><span style='font-size:8.0pt;line-height:120%;
font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:9.0pt;font-family:Webdings;
color:#779959'>ü</span><span style='font-size:9.0pt;font-family:"Gill Sans MT","sans-serif";
color:#779959'> </span><span lang=EN-GB style='font-size:9.0pt;font-family:
"Arial Narrow","sans-serif";color:#779959'>Please consider the environment
before printing this email</span><span style='font-size:11.0pt;font-family:
"Calibri","sans-serif";color:windowtext'><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p>&nbsp;</o:p></span></p>

</div>

<p class=MsoNormal><span style='color:windowtext'><o:p>&nbsp;</o:p></span></p>

<div>

<div class=MsoNormal align=center style='text-align:center'><span
style='color:windowtext'>

<hr size=2 width="100%" align=center>

</span></div>

<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Hernandez,
Arturo<br>
<b>Sent:</b> Tuesday, October 27, 2009 1:00 PM<br>
<b>To:</b> Crockett, Jim; Scott Criswell; Rosenberg, Michael I<br>
<b>Cc:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] Ashrae 90.1 - Unmet hours</span><span
style='color:windowtext'><o:p></o:p></span></p>

</div>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I use to agree with the statement and methodology you have
provided. However, there have been discussions that definition of
&#8220;exceed&#8221; is the &#8220;difference of&#8221;. Hence making this
statement false. In addition the ASHRAE User&#8217;s Manual also indicates that
it is the &#8220;difference of&#8221; and does not use the word exceed.<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<div>

<p class=MsoNormal style='margin-bottom:12.0pt'><b><span style='font-size:8.5pt;
font-family:"Arial","sans-serif";color:#666666'>ARTURO HERNANDEZ, Mechanical
Engineering</span></b><span style='font-size:8.5pt;font-family:"Arial","sans-serif";
color:#666666'><br>
<b>OWP/P | CANNON DESIGN</b></span><span style='font-size:9.0pt;font-family:
"Arial","sans-serif";color:green'><o:p></o:p></span></p>

</div>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<div>

<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";
color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Crockett,
Jim<br>
<b>Sent:</b> Tuesday, October 27, 2009 1:28 PM<br>
<b>To:</b> Scott Criswell; Rosenberg, Michael I<br>
<b>Cc:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] Ashrae 90.1 - Unmet hours<o:p></o:p></span></p>

</div>

</div>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>It&#8217;s splitting hairs, but one item in the email from Ashu is
not quite correct.&nbsp; The following sentence is from his email, and the
incorrect line is in bold:<o:p></o:p></span></p>

<ul style='margin-top:0in' type=disc>
 <li class=MsoNormal style='text-align:justify;mso-list:l3 level1 lfo3'>As per
     ASHRAE 90.1-2004, the unmet hours of the total building should be less
     than or equal to 300 hours and <b><i>the difference in the base case and
     proposed case should be less than or equal to 50 hours.</i></b><o:p></o:p></li>
</ul>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>What Ashrae actually says is, &#8220;. . .unmet load hours for the <i>proposed</i>
design shall not exceed the number of load hours for the <i>baseline building
design</i> by more than 50.&#8221;&nbsp; <o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>If you have a building where the baseline has 300 unmet hours, and
the proposed has 0 unmet hours, no correction is needed.&nbsp; A correction is
only needed if the unmet hours in the <i>proposed</i> exceeds those in the <i>baseline
</i>by more than 50.&nbsp; (or if either exceeds 300).&nbsp; Worded
differently, if the baseline has 300 unmet hours, and the proposed system has 0
unmet hours, you do not need to make the baseline more stringent.&nbsp; </span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p>&nbsp;</o:p></span></p>

<div>

<div class=MsoNormal align=center style='text-align:center'><span
style='color:windowtext'>

<hr size=2 width="100%" align=center>

</span></div>

<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'> Scott Criswell
[mailto:scott.criswell@doe2.com] <br>
<b>Sent:</b> Tuesday, October 27, 2009 10:09 AM<br>
<b>To:</b> Rosenberg, Michael I<br>
<b>Cc:</b> ashu gupta; Nick Caton; Crockett, Jim; Kendra Tupper;
bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] Ashrae 90.1 - Unmet hours</span><span
style='color:windowtext'><o:p></o:p></span></p>

</div>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>I can confirm Mike's understanding of the DOE-2/eQUEST
results.&nbsp; To get the correct number of hours of unmet loads, people should
MULTIPLY the Percent hours outside throttling range from BEPS or BEPU by the
total annual &quot;hours fans on&quot; listed in report SS-E.<br>
<br>
One other comment re: Ashu's write-up - I believe that (for DOE-2/eQUEST) a
zone temperature has to be more than one degree outside the throttling range
for that hour to be counted as an hour outside throttling range.&nbsp; So for a
zone with a heating thermostat setpoint of 72 and a 2 degree throttling range
(=&gt; 71-73 degree &quot;throttling range&quot;), the zone temperature would
have to be LESS THAN 70 in order for that hour to be counted.<br>
<br>
related info -<br>
We are contemplating a change to the Air-Side HVAC Summary view in the eQUEST
interface to report this total number of hours as opposed to just the percent
in the totals section at the bottom of the report.<br>
We have also just in the past several days (thanks to the efforts of Steve
Gates) added precision to the percent hours outside throttling range reported
on BEPS &amp; BEPU and ALSO added separate reporting of hours any zone is
either under cooled or under heated, intended for reporting to LEED submission
templates.&nbsp; Assuming no further changes (which is certainly not out of the
question), future releases of DOE-2/eQUEST will report the following in the
BEPS &amp; BEPU reports:<br>
<tt><span style='font-size:10.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
PERCENT OF HOURS ANY SYSTEM ZONE OUTSIDE OF THROTTLING RANGE =&nbsp; 4.45</span></tt><span
style='font-size:10.0pt;font-family:"Courier New"'><br>
<tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PERCENT OF HOURS ANY PLANT
LOAD NOT
SATISFIED&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
=&nbsp; 0.00</tt><br>
<tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; HOURS ANY ZONE ABOVE
COOLING THROTTLING
RANGE&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
=&nbsp;&nbsp;&nbsp; 98</tt><br>
<tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; HOURS ANY ZONE BELOW
HEATING THROTTLING
RANGE&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
=&nbsp;&nbsp;&nbsp; 25</tt><br>
</span><br>
- Scott<br>
<br>
<br>
Rosenberg, Michael I wrote: <o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Ashu,</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I
am in agreement with everything you stated except possibly this;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal style='margin-left:.25in;text-align:justify'>&#8220;When
percentage of unmet is specified, than this is the percentage of total number
of hours (1 year- 8760 hours) for which the simulation is performed (not just
the occupied hours)&#8221;<o:p></o:p></p>

<p class=MsoNormal style='text-align:justify'>&nbsp;<o:p></o:p></p>

<p class=MsoNormal style='text-align:justify'>My understanding is that some
simulation programs (DOE2 and eQuest in particular) report this as a percentage
of hours that the fan is running. I could be wrong, and I am sure some of you
DOE2 experts can comment on what is reported in the DOE2 BEPS report.<o:p></o:p></p>

<p class=MsoNormal style='text-align:justify'>&nbsp;<o:p></o:p></p>

<p class=MsoNormal style='text-align:justify'>Mike<o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p>

<div>

<p class=MsoNormal><b><span style='font-family:"Verdana","sans-serif";
color:#D47500'>__________________________</span></b> <o:p></o:p></p>

<p class=MsoNormal><b><span style='font-family:"Verdana","sans-serif"'>Michael
Rosenberg</span></b> <br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Senior
Commercial Buildings Energy Analyst</span> <br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>ENERGY &amp;
ENVIRONMENT DIRECTORATE </span><o:p></o:p></p>

</div>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Pacific
Northwest National Laboratory </span><br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>2032 Todd
Street </span><br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Eugene, OR
97405 </span><br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>(541)
844-1960 </span><br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'><a
href="mailto:michael.rosenberg@pnl.gov">michael.rosenberg@pnl.gov</a> </span><br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#D47500'><a
href="http://www.pnl.gov">www.pnl.gov</a></span> <o:p></o:p></p>

<div>

<div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;
border-color:-moz-use-text-color -moz-use-text-color'>

<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"'> ashu gupta [<a
href="mailto:kce2@kamalcogentenergy.com">mailto:kce2@kamalcogentenergy.com</a>]
<br>
<b>Sent:</b> Monday, October 26, 2009 10:17 PM<br>
<b>To:</b> Rosenberg, Michael I; 'Nick Caton'; 'Crockett, Jim'; 'Kendra Tupper'<br>
<b>Cc:</b> <a href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> RE: [Bldg-sim] Ashrae 90.1 - Unmet hours</span><o:p></o:p></p>

</div>

</div>

<p class=MsoNormal>&nbsp;<o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Dear All,</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Explanation of Unmet Hours is as follows:</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal style='text-align:justify'><b>Unmet Hours:</b><o:p></o:p></p>

<p class=MsoNormal style='text-align:justify'>Unmet hours of a building are the
summation of the number of hours when the heating or the cooling set point
temperature of a zone is not met either by the HVAC system or by the plant.<o:p></o:p></p>

<p><b>Understanding/Interpreting/Calculating the number of unmet hours:</b><o:p></o:p></p>

<ul style='margin-top:0in' type=disc>
 <li class=MsoNormal style='text-align:justify;mso-list:l6 level1 lfo6'>Unmet
     hour is for a particular zone when the zone indoor temperature is higher
     than the heating or cooling set point specified in that hour.<o:p></o:p></li>
 <li class=MsoNormal style='text-align:justify;mso-list:l6 level1 lfo6'>The
     number or the percentage of unmet hours in a building is usually given as
     one of the outputs of the simulation.<o:p></o:p></li>
 <li class=MsoNormal style='text-align:justify;mso-list:l6 level1 lfo6'>Zone
     wise unmet can also be read from the various output files provided by the
     software used for simulation.<o:p></o:p></li>
</ul>

<p class=MsoNormal style='text-align:justify'>(Example: &nbsp;<o:p></o:p></p>

<p class=MsoNormal style='text-align:justify'>Visual DOE: &#8220;SS-J System
Peak Heating and Cooling Days&#8221; report &amp;<o:p></o:p></p>

<p class=MsoNormal style='text-align:justify'>Energy Plus: Output Variable,
&#8220;Time Cooling Set point Not met&#8221;)<o:p></o:p></p>

<ul style='margin-top:0in' type=disc>
 <li class=MsoNormal style='text-align:justify;mso-list:l4 level1 lfo9'>When
     two zones are unmet at the same hour, this will count to one unmet hour
     for the building.<o:p></o:p></li>
 <li class=MsoNormal style='text-align:justify;mso-list:l4 level1 lfo9'>When
     two zones have unmet hours during different non overlapping times of a
     day, the total number of unmet hours in that day is the summation of these
     unmet hours of each zone. This total for the year should be considered as
     the total unmet hours of the building.<o:p></o:p></li>
</ul>

<p class=MsoNormal style='text-align:justify;text-indent:.25in'><i>Example: </i><o:p></o:p></p>

<p class=MsoNormal style='text-align:justify;text-indent:.25in'>When each zone
is unmet in the specified hours as beside,<o:p></o:p></p>

<p class=MsoNormal style='text-align:justify;text-indent:.25in'>&nbsp;<o:p></o:p></p>

<p class=MsoNormal style='text-align:justify;text-indent:.25in'>Zone 1 unmet
during:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 14&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
16<o:p></o:p></p>

<p class=MsoNormal style='text-align:justify;text-indent:.25in'>Zone 2 unmet
during:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
12&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 16<o:p></o:p></p>

<p class=MsoNormal style='text-align:justify;text-indent:.25in'>Zone 3 unmet
during:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
12&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 13<o:p></o:p></p>

<p class=MsoNormal style='text-align:justify'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<o:p></o:p></p>

<p class=MsoNormal style='text-align:justify;text-indent:.5in'>Total number of
unmet hours of the building: <b>7 hrs</b> and not 12hrs.<o:p></o:p></p>

<p class=MsoNormal style='text-align:justify;text-indent:.5in'>6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
12&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
13&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
14&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 16<o:p></o:p></p>

<p class=MsoNormal style='text-align:justify'>&nbsp;<o:p></o:p></p>

<ul style='margin-top:0in' type=disc>
 <li class=MsoNormal style='text-align:justify;mso-list:l3 level1 lfo3'>When
     percentage of unmet is specified, than this is the percentage of total
     number of hours (1 year- 8760 hours) for which the simulation is performed
     (not just the occupied hours)<o:p></o:p></li>
 <li class=MsoNormal style='text-align:justify;mso-list:l3 level1 lfo3'>As per
     ASHRAE 90.1-2004, the unmet hours of the total building should be less
     than or equal to 300 hours and the difference in the base case and
     proposed case should be less than or equal to 50 hours.<o:p></o:p></li>
 <li class=MsoNormal style='text-align:justify;mso-list:l3 level1 lfo3'>If
     unmet load hours in the proposed building exceed the unmet load hours in
     the baseline building by more than 50, then the size of equipment in the
     baseline building shall be reduced incrementally, until the condition is
     satisfied.<o:p></o:p></li>
</ul>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Thanks</span><o:p></o:p></p>

<div>

<p style='margin-bottom:12.0pt'><span style='font-size:10.0pt;color:#004080'>Ashu
Gupta,<br>
Project Engineer,<br>
Kamal Cogent Energy,<br>
Kamal Ratan Chanbers 1st Floor,<br>
Opp. GPO, M.I. Road,<br>
Jaipur 302001<br>
Ph 141 2373185(W)<br>
Ph 9251665008(M)<br>
</span><span style='font-family:"Book Antiqua","serif";color:#004080'><a
href="mailto:kce2@kamalcogentenergy.com"><span style='font-size:10.0pt;
font-family:"Times New Roman","serif"'>kce2@kamalcogentenergy.com</span></a><br>
<a href="http://www.kamalcogentenergy.com"><span style='font-size:10.0pt;
font-family:"Times New Roman","serif"'>www.kamalcogentenergy.com</span></a></span><o:p></o:p></p>

</div>

<div>

<div class=MsoNormal align=center style='text-align:center'>

<hr size=2 width="100%" align=center>

</div>

<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"'> <a
href="mailto:bldg-sim-bounces@lists.onebuilding.org">bldg-sim-bounces@lists.onebuilding.org</a>
[<a href="mailto:bldg-sim-bounces@lists.onebuilding.org">mailto:bldg-sim-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Rosenberg, Michael I<br>
<b>Sent:</b> Tuesday, October 27, 2009 9:07 AM<br>
<b>To:</b> Nick Caton; Crockett, Jim; Kendra Tupper<br>
<b>Cc:</b> <a href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Bldg-sim] Ashrae 90.1 - Unmet hours</span><o:p></o:p></p>

</div>

<p class=MsoNormal>&nbsp;<o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I
think eQuest and any DOE2 based software does report the hours of loads not
being met as required by Appendix G. In the BEPS report it gives &#8220;PERCENT
OF HOURS ANY SYSTEM ZONE OUTSIDE OF THROTTLING RANGE&#8221;. My understanding
of this number is that it is a percentage of scheduled fan run-time hours, so
some calculation may be necessary.</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p>

<div>

<p class=MsoNormal><b><span style='font-family:"Verdana","sans-serif";
color:#D47500'>__________________________</span></b> <o:p></o:p></p>

<p class=MsoNormal><b><span style='font-family:"Verdana","sans-serif"'>Michael
Rosenberg</span></b> <br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Senior Commercial
Buildings Energy Analyst</span> <br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>ENERGY &amp;
ENVIRONMENT DIRECTORATE </span><o:p></o:p></p>

</div>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Pacific
Northwest National Laboratory </span><br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>2032 Todd
Street </span><br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Eugene, OR
97405 </span><br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>(541)
844-1960 </span><br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'><a
href="mailto:michael.rosenberg@pnl.gov">michael.rosenberg@pnl.gov</a> </span><br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#D47500'><a
href="http://www.pnl.gov">www.pnl.gov</a></span> <o:p></o:p></p>

<div>

<div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;
border-color:-moz-use-text-color -moz-use-text-color'>

<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"'> Nick Caton [<a
href="mailto:ncaton@smithboucher.com">mailto:ncaton@smithboucher.com</a>] <br>
<b>Sent:</b> Monday, October 26, 2009 8:20 PM<br>
<b>To:</b> Rosenberg, Michael I; Crockett, Jim; Kendra Tupper<br>
<b>Cc:</b> <a href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> RE: [Bldg-sim] Ashrae 90.1 - Unmet hours</span><o:p></o:p></p>

</div>

</div>

<p class=MsoNormal>&nbsp;<o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Mike,</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I appreciate you bringing this up.&nbsp; This definition drives
straight to the heart of defining the issue-at-hand&#8230;&nbsp; Since I kinda
presented both sides of the issue at once &#8211; I&#8217;d like to clarify
where I stand regarding what the correct interpretation <u>should be</u>.&nbsp;
</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>The logic is as follows:&nbsp; If a modeled year has 8,760
hours, can there be 10,000 unmet load hours?&nbsp; By strict reading of the
standard&#8217;s definition below, I would put my foot down stating there can <u>only</u>
be 8,760, at most.&nbsp; </span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>By common practice however, it appears a majority (myself
included) sum unmet cooling/heating hours between the zones, even if they should
fall on the same modeled hour, against the intent of the standard.&nbsp; </span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>My pure speculation (for what it&#8217;s worth, as a young EIT)
is this practice developed because eQuest BDL reports don&#8217;t present the
crunched numbers in a way that makes the sum of unmet load hours, as intended
by 90.1, easy to determine.&nbsp; I wouldn&#8217;t be shocked to learn other
energy modeling software packages generate LEED compliance summaries featuring
unmet load hour totals in sync with the real intent of ASHRAE 90.1.</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>If there&#8217;s anything I&#8217;ve learned from going out on a
limb, it&#8217;s that I&#8217;m sure to learn something whether I fall or not!</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>~Nick</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>&nbsp;</span><o:p></o:p></p>

<div>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><img border=0 width=119 height=37 id="_x0000_i1026"
src="cid:image001.jpg@01CA5712.9B7A45B0" alt="cid:489575314@22072009-0ABB"></span><o:p></o:p></p>

<p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Stylus BT","sans-serif";
color:#2D4D5E'>&nbsp;</span></b><o:p></o:p></p>

<p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Stylus BT","sans-serif";
color:#2D4D5E'>NICK CATON, E.I.T.</span></b><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Calibri","sans-serif";
color:#CC9900'>PROJECT ENGINEER</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>25501 west valley parkway</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>olathe ks 66061</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>direct 913 344.0036</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>fax 913 345.0617</span><o:p></o:p></p>

<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>Check out our new web-site @ </span></i><span style='font-size:
11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a
href="www.smithboucher.com" title="blocked::www.smithboucher.com"><span
style='font-size:10.0pt'>www.smithboucher.com</span></a></span><u><span
style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:blue'> </span></u><o:p></o:p></p>

</div>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>&nbsp;</span><o:p></o:p></p>

<div>

<div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;
border-color:-moz-use-text-color -moz-use-text-color'>

<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"'> Rosenberg, Michael
I [<a href="mailto:michael.rosenberg@pnl.gov">mailto:michael.rosenberg@pnl.gov</a>]
<br>
<b>Sent:</b> Monday, October 26, 2009 7:39 PM<br>
<b>To:</b> Nick Caton; Crockett, Jim; <a
href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> RE: [Bldg-sim] Ashrae 90.1 - Unmet hours</span><o:p></o:p></p>

</div>

</div>

<p class=MsoNormal>&nbsp;<o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Nick,</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Your
interpretation is the correct one. According to the definitions in Standard
90.1.</span><o:p></o:p></p>

<p class=definitions><b><i><span style='font-family:"Arial","sans-serif"'>unmet
load hour:</span></i></b><span style='font-family:"Arial","sans-serif"'> an
hour in which one or more zones is outside of the thermostat setpoint range.</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Mike</span><o:p></o:p></p>

<div>

<p class=MsoNormal><b><span style='font-family:"Verdana","sans-serif";
color:#D47500'>__________________________</span></b> <o:p></o:p></p>

<p class=MsoNormal><b><span style='font-family:"Verdana","sans-serif"'>Michael
Rosenberg</span></b> <br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Senior Commercial
Buildings Energy Analyst</span> <br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>ENERGY &amp;
ENVIRONMENT DIRECTORATE </span><o:p></o:p></p>

</div>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Pacific
Northwest National Laboratory </span><br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>2032 Todd
Street </span><br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Eugene, OR
97405 </span><br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>(541)
844-1960 </span><br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'><a
href="mailto:michael.rosenberg@pnl.gov">michael.rosenberg@pnl.gov</a> </span><br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#D47500'><a
href="http://www.pnl.gov">www.pnl.gov</a></span> <o:p></o:p></p>

<div>

<div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;
border-color:-moz-use-text-color -moz-use-text-color'>

<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"'> <a
href="mailto:bldg-sim-bounces@lists.onebuilding.org">bldg-sim-bounces@lists.onebuilding.org</a>
[<a href="mailto:bldg-sim-bounces@lists.onebuilding.org">mailto:bldg-sim-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Nick Caton<br>
<b>Sent:</b> Monday, October 26, 2009 5:33 PM<br>
<b>To:</b> Crockett, Jim; <a href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Bldg-sim] Ashrae 90.1 - Unmet hours</span><o:p></o:p></p>

</div>

</div>

<p class=MsoNormal>&nbsp;<o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Jim,</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>That&#8217;s actually a really good question that I was afraid
to ask when I first encountered it &#8211; kudos to you!&nbsp; I&#8217;ve
currently resolved to follow what others seemed to be doing within and outside
of my office:&nbsp; Sum up all unmet hours for cooling and heating between the
zones just as you describe.&nbsp; &nbsp;In your example, I&#8217;d agree that
the unmet hours of your 301 zone building total 301.</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I do agree that this doesn&#8217;t seem intuitively to be the
intent of the standard, however between what is suggested within 90.1, the LEED
handbook, and the LEED credit templates &#8211; I honestly can&#8217;t see any
clear indication either way on which is the appropriate interpretation.&nbsp; </span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I think the appropriate metric for ensuring appropriately sized
systems should be something like: &#8220;hours of the modeled year in which at
least one zone has an unmet cooling/heating load,&#8221;&nbsp; but I think that
was avoided by all concerned parties because it&#8217;s too wordy!</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>My acting interpretation, again referencing your example, is
that all systems of your 301 zone example affecting the zones with unmet
cooling/heating hours should have their heating/cooling/overall sizing capacity
ratios increased incrementally until the design hours fall below 300 (and/or
within 50 of the sum from the other model, depending on your situation).</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Afraid I&#8217;m only really adding to the discussion here
without providing a solid answer.&nbsp; Would like to echo the desire to see
anyone&#8217;s experiences that would help us know the &#8220;right&#8221; way
to interpret this (in my case, specifically in the context of a LEED
submittal).</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>&nbsp;</span><o:p></o:p></p>

<div>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><img border=0 width=119 height=37
id="Picture_x005f_x005f_x005f_x005f_x005f_x005f_x005f_x0020_1"
src="cid:image001.jpg@01CA5712.9B7A45B0" alt="cid:489575314@22072009-0ABB"></span><o:p></o:p></p>

<p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Stylus BT","sans-serif";
color:#2D4D5E'>&nbsp;</span></b><o:p></o:p></p>

<p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Stylus BT","sans-serif";
color:#2D4D5E'>NICK CATON, E.I.T.</span></b><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Calibri","sans-serif";
color:#CC9900'>PROJECT ENGINEER</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>25501 west valley parkway</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>olathe ks 66061</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>direct 913 344.0036</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>fax 913 345.0617</span><o:p></o:p></p>

<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>Check out our new web-site @ </span></i><span style='font-size:
11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a
href="www.smithboucher.com" title="blocked::www.smithboucher.com"><span
style='font-size:10.0pt'>www.smithboucher.com</span></a></span><u><span
style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:blue'> </span></u><o:p></o:p></p>

</div>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>&nbsp;</span><o:p></o:p></p>

<div>

<div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;
border-color:-moz-use-text-color -moz-use-text-color'>

<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"'> <a
href="mailto:bldg-sim-bounces@lists.onebuilding.org">bldg-sim-bounces@lists.onebuilding.org</a>
[<a href="mailto:bldg-sim-bounces@lists.onebuilding.org">mailto:bldg-sim-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Crockett, Jim<br>
<b>Sent:</b> Monday, October 26, 2009 4:27 PM<br>
<b>To:</b> <a href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> [Bldg-sim] Ashrae 90.1 - Unmet hours</span><o:p></o:p></p>

</div>

</div>

<p class=MsoNormal>&nbsp;<o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Ashrae
90.1 (2004) Appendix G3.1.2.2 requires a baseline building to have less than
300 unmet hours. &nbsp;What exactly does this mean?</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>To
illustrate my question: &nbsp;assume you have a building with 301 zones, and
each zone has 1 unmet hour per year. &nbsp;This gives you a total of 301 unmet
hours, and requires you to increase your baseline equipment capacity. &nbsp;But
you could argue that, on average, the building has only 1 unmet hour per year.</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Have
any of you run into this?&nbsp; Is it addressed in an addendum somewhere, etc?</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Any
help is appreciated.&nbsp; Thanks,</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Jim
Crockett, P.E.</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-family:"Courier New"'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Senior
Project Engineer</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Energy
&amp; Carbon Management</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Nexant,
Inc.</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>4021&nbsp;S.
700 E., Suite 250</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Salt
Lake City, Utah 84107</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-family:"Courier New"'>&nbsp;</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>(801)
639-5603 - phone</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>(801)
266-4786 - fax</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-family:"Courier New"'>&nbsp;</span><o:p></o:p></p>

<pre><o:p>&nbsp;</o:p></pre><pre style='text-align:center'><o:p>&nbsp;</o:p></pre><pre
style='text-align:center'><o:p>&nbsp;</o:p></pre><pre style='text-align:center'><o:p>&nbsp;</o:p></pre><pre
style='text-align:center'><o:p>&nbsp;</o:p></pre><pre style='text-align:center'><o:p>&nbsp;</o:p></pre><pre
style='text-align:center'><o:p>&nbsp;</o:p></pre><pre style='text-align:center'><o:p>&nbsp;</o:p></pre><pre
style='text-align:center'><o:p>&nbsp;</o:p></pre><pre style='text-align:center'>

<hr size=4 width="90%" align=center>

</pre><pre style='text-align:center'><o:p>&nbsp;</o:p></pre><pre
style='text-align:center'><o:p>&nbsp;</o:p></pre><pre style='text-align:center'><o:p>&nbsp;</o:p></pre><pre
style='text-align:center'><o:p>&nbsp;</o:p></pre><pre style='text-align:center'><o:p>&nbsp;</o:p></pre><pre
style='text-align:center'><o:p>&nbsp;</o:p></pre><pre style='text-align:center'><o:p>&nbsp;</o:p></pre><pre
style='text-align:center'><o:p>&nbsp;</o:p></pre><pre><o:p>&nbsp;</o:p></pre><pre>_______________________________________________<o:p></o:p></pre><pre>Bldg-sim mailing list<o:p></o:p></pre><pre><a
href="http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org</a><o:p></o:p></pre><pre>To unsubscribe from this mailing list send&nbsp; a blank message to <a
href="mailto:BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG">BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG</a><o:p></o:p></pre><pre>&nbsp; <o:p></o:p></pre>

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