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<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>It’s splitting hairs, but one item in
the email from Ashu is not quite correct. The following sentence is from
his email, and the incorrect line is in bold:<o:p></o:p></span></font></p>
<ul style='margin-top:0in' type=disc>
<li class=MsoNormal style='text-align:justify;mso-list:l0 level1 lfo4'><font
size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'>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><span style='font-weight:bold;
font-style:italic'>the difference in the base case and proposed case
should be less than or equal to 50 hours.</span></i></b><o:p></o:p></span></font><u5:p></u5:p></li>
</ul>
<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'>What Ashrae actually says is, “. .
.unmet load hours for the <i><span style='font-style:italic'>proposed</span></i>
design shall not exceed the number of load hours for the <i><span
style='font-style:italic'>baseline building design</span></i> by more than 50.”
<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'>If you have a building where the baseline
has 300 unmet hours, and the proposed has 0 unmet hours, no correction is
needed. A correction is only needed if the unmet hours in the <i><span
style='font-style:italic'>proposed</span></i> exceeds those in the <i><span
style='font-style:italic'>baseline </span></i>by more than 50. (or if
either exceeds 300). 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. </span></font><o:p></o:p></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>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:windowtext'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 color=black face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight:bold'>From:</span></font></b><font
size=2 color=black face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:windowtext'> Scott Criswell [mailto:scott.criswell@doe2.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, October 27, 2009
10:09 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Rosenberg, Michael I<br>
<b><span style='font-weight:bold'>Cc:</span></b> ashu gupta; Nick Caton; Crockett,
Jim; Kendra Tupper; <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] Ashrae
90.1 - Unmet hours</span></font><font color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>I can confirm Mike's understanding of the DOE-2/eQUEST
results. 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 "hours fans on" 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. So for a
zone with a heating thermostat setpoint of 72 and a 2 degree throttling range
(=> 71-73 degree "throttling range"), 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 & BEPU and ALSO added separate reporting of hours any zone is
either under cooled or under heated, intended for reporting to LEED submission
templates. 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 & BEPU reports:<br>
</span></font><tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>
PERCENT OF HOURS ANY SYSTEM ZONE OUTSIDE OF THROTTLING RANGE = 4.45</span></font></tt><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><br>
<tt><font face="Courier New">
PERCENT OF HOURS ANY PLANT LOAD NOT
SATISFIED
= 0.00</font></tt><br>
<tt><font face="Courier New">
HOURS ANY ZONE ABOVE COOLING THROTTLING
RANGE
= 98</font></tt><br>
<tt><font face="Courier New">
HOURS ANY ZONE BELOW HEATING THROTTLING
RANGE
= 25</font></tt><br>
</span></font><br>
- Scott<br>
<br>
<br>
Rosenberg, Michael I wrote: <o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial'><!--[if gte mso 9]><xml>
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</xml><![endif]-->Ashu,<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial'>I am in agreement with everything you stated except
possibly this;<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.25in;text-align:justify'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt'>“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></span></font><u5:p></u5:p></p>
<p class=MsoNormal style='text-align:justify'><u5:p><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></u5:p></p>
<p class=MsoNormal style='text-align:justify'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'>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></span></font><u5:p></u5:p></p>
<p class=MsoNormal style='text-align:justify'><u5:p><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></u5:p></p>
<p class=MsoNormal style='text-align:justify'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'>Mike<o:p></o:p></span></font><u5:p></u5:p></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial'> <u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial'><u5:p> </u5:p></span></font><o:p></o:p></p>
<div>
<p class=MsoNormal><b><font size=3 color="#d47500" face=Verdana><span
style='font-size:12.0pt;font-family:Verdana;color:#D47500;font-weight:bold'>__________________________</span></font></b>
<u5:p></u5:p><o:p></o:p></p>
<p class=MsoNormal><b><font size=3 color=black face=Verdana><span
style='font-size:12.0pt;font-family:Verdana;font-weight:bold'>Michael Rosenberg</span></font></b>
<br>
<font size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'>Senior
Commercial Buildings Energy Analyst</span></font> <br>
<font size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'>ENERGY
& ENVIRONMENT DIRECTORATE </span></font><u5:p></u5:p><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana'>Pacific Northwest National
Laboratory </span></font><br>
<st1:address w:st="on"><st1:Street w:st="on"><font size=2 face=Verdana><span
style='font-size:10.0pt;font-family:Verdana'>2032 Todd Street</span></font></st1:Street><font
size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'> </span></font><br>
<st1:City w:st="on"><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>Eugene</span></font></st1:City><font size=2
face=Verdana><span style='font-size:10.0pt;font-family:Verdana'>, <st1:State
w:st="on">OR</st1:State> <st1:PostalCode w:st="on">97405</st1:PostalCode></span></font></st1:address><font
size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'> </span></font><br>
<font size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'>(541)
844-1960 </span></font><br>
<font size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'><a
href="mailto:michael.rosenberg@pnl.gov">michael.rosenberg@pnl.gov</a> </span></font><br>
<font size=2 color="#d47500" face=Verdana><span style='font-size:10.0pt;
font-family:Verdana;color:#D47500'><a href="http://www.pnl.gov">www.pnl.gov</a></span></font>
<o:p></o:p></p>
<u5:p></u5: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><font size=2 color=black 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'> ashu
gupta [<a href="mailto:kce2@kamalcogentenergy.com">mailto:kce2@kamalcogentenergy.com</a>]
<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, October 26, 2009
10:17 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Rosenberg, Michael I; 'Nick
Caton'; 'Crockett, Jim'; 'Kendra Tupper'<br>
<b><span style='font-weight:bold'>Cc:</span></b> <a
href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [Bldg-sim] Ashrae
90.1 - Unmet hours<u5:p></u5:p></span></font><o:p></o:p></p>
</div>
</div>
<p class=MsoNormal><u5:p><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></u5:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Dear All,<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Explanation of Unmet Hours is as follows:<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal style='text-align:justify'><b><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;font-weight:bold'>Unmet
Hours:</span></font></b><u5:p></u5:p><o:p></o:p></p>
<p class=MsoNormal style='text-align:justify'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'>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></span></font><u5:p></u5:p></p>
<p><b><font size=3 color=black face="Times New Roman"><span style='font-size:
12.0pt;font-weight:bold'>Understanding/Interpreting/Calculating the number of
unmet hours:</span></font></b><u5:p></u5:p><o:p></o:p></p>
<ul style='margin-top:0in' type=disc>
<li class=MsoNormal style='text-align:justify;mso-list:l3 level1 lfo2'><font
size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'>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></span></font><u5:p></u5:p></li>
<li class=MsoNormal style='text-align:justify;mso-list:l3 level1 lfo2'><font
size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'>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></span></font><u5:p></u5:p></li>
<li class=MsoNormal style='text-align:justify;mso-list:l3 level1 lfo2'><font
size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'>Zone
wise unmet can also be read from the various output files provided by the
software used for simulation.<o:p></o:p></span></font><u5:p></u5:p></li>
</ul>
<p class=MsoNormal style='text-align:justify'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'>(Example: <o:p></o:p></span></font><u5:p></u5:p></p>
<p class=MsoNormal style='text-align:justify'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'>Visual DOE: “SS-J
System Peak Heating and Cooling Days” report &<o:p></o:p></span></font><u5:p></u5:p></p>
<p class=MsoNormal style='text-align:justify'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'>Energy Plus: Output
Variable, “Time Cooling Set point Not met”)<o:p></o:p></span></font><u5:p></u5:p></p>
<ul style='margin-top:0in' type=disc>
<li class=MsoNormal style='text-align:justify;mso-list:l2 level1 lfo3'><font
size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'>When
two zones are unmet at the same hour, this will count to one unmet hour
for the building.<o:p></o:p></span></font><u5:p></u5:p></li>
<li class=MsoNormal style='text-align:justify;mso-list:l2 level1 lfo3'><font
size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'>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></span></font><u5:p></u5:p></li>
</ul>
<p class=MsoNormal style='text-align:justify;text-indent:.25in'><i><font
size=3 color=black face="Times New Roman"><span style='font-size:12.0pt;
font-style:italic'>Example: </span></font></i><u5:p></u5:p><o:p></o:p></p>
<p class=MsoNormal style='text-align:justify;text-indent:.25in'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt'>When each
zone is unmet in the specified hours as beside,<o:p></o:p></span></font><u5:p></u5:p></p>
<p class=MsoNormal style='text-align:justify;text-indent:.25in'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font><u5:p></u5:p></p>
<p class=MsoNormal style='text-align:justify;text-indent:.25in'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt'>Zone 1 unmet
during:
6
8
14 16<o:p></o:p></span></font><u5:p></u5:p></p>
<p class=MsoNormal style='text-align:justify;text-indent:.25in'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt'>Zone 2 unmet
during:
6
8
12 16<o:p></o:p></span></font><u5:p></u5:p></p>
<p class=MsoNormal style='text-align:justify;text-indent:.25in'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt'>Zone 3 unmet
during:
7
8
12 13<o:p></o:p></span></font><u5:p></u5:p></p>
<p class=MsoNormal style='text-align:justify'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'>
<o:p></o:p></span></font><u5:p></u5:p></p>
<p class=MsoNormal style='text-align:justify;text-indent:.5in'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt'>Total number of
unmet hours of the building: <b><span style='font-weight:bold'>7 hrs</span></b>
and not 12hrs.<o:p></o:p></span></font><u5:p></u5:p></p>
<p class=MsoNormal style='text-align:justify;text-indent:.5in'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt'>6
7
8
12
13
14 16<o:p></o:p></span></font><u5:p></u5:p></p>
<p class=MsoNormal style='text-align:justify'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font><u5:p></u5:p></p>
<ul style='margin-top:0in' type=disc>
<li class=MsoNormal style='text-align:justify;mso-list:l0 level1 lfo4'><font
size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'>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></span></font><u5:p></u5:p></li>
<li class=MsoNormal style='text-align:justify;mso-list:l0 level1 lfo4'><font
size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'>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></span></font><u5:p></u5:p></li>
<li class=MsoNormal style='text-align:justify;mso-list:l0 level1 lfo4'><font
size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'>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></span></font><u5:p></u5:p></li>
</ul>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Thanks<u5:p></u5:p></span></font><o:p></o:p></p>
<div>
<p style='margin-bottom:12.0pt'><font size=2 color="#004080"
face="Times New Roman"><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, <st1:Street w:st="on"><st1:address w:st="on">M.I. Road</st1:address></st1:Street>,<br>
Jaipur 302001<br>
Ph 141 2373185(W)<br>
Ph 9251665008(M)<br>
</span></font><font color="#004080" face="Book Antiqua"><span style='font-family:
"Book Antiqua";color:#004080'><a href="mailto:kce2@kamalcogentenergy.com"
moz-do-not-send=true><font size=2 face="Times New Roman"><span
style='font-size:10.0pt;font-family:"Times New Roman"'>kce2@kamalcogentenergy.com</span></font></a><br>
<a href="http://www.kamalcogentenergy.com" moz-do-not-send=true><font size=2
face="Times New Roman"><span style='font-size:10.0pt;font-family:"Times New Roman"'>www.kamalcogentenergy.com</span></font></a><u5:p></u5:p></span></font><o:p></o:p></p>
</div>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center>
</span></font></div>
<p class=MsoNormal><b><font size=2 color=black 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'> <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><span style='font-weight:bold'>On Behalf Of </span></b>Rosenberg, Michael I<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, October 27, 2009
9:07 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Nick Caton; Crockett, Jim;
Kendra Tupper<br>
<b><span style='font-weight:bold'>Cc:</span></b> <a
href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Bldg-sim] Ashrae
90.1 - Unmet hours</span></font><u5:p></u5:p><o:p></o:p></p>
</div>
<p class=MsoNormal><u5:p><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></u5:p></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial'>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 “PERCENT OF HOURS ANY SYSTEM ZONE OUTSIDE OF THROTTLING
RANGE”. My understanding of this number is that it is a percentage of
scheduled fan run-time hours, so some calculation may be necessary.<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial'><u5:p> </u5:p></span></font><o:p></o:p></p>
<div>
<p class=MsoNormal><b><font size=3 color="#d47500" face=Verdana><span
style='font-size:12.0pt;font-family:Verdana;color:#D47500;font-weight:bold'>__________________________</span></font></b>
<u5:p></u5:p><o:p></o:p></p>
<p class=MsoNormal><b><font size=3 color=black face=Verdana><span
style='font-size:12.0pt;font-family:Verdana;font-weight:bold'>Michael Rosenberg</span></font></b>
<br>
<font size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'>Senior
Commercial Buildings Energy Analyst</span></font> <br>
<font size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'>ENERGY
& ENVIRONMENT DIRECTORATE </span></font><u5:p></u5:p><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana'>Pacific Northwest National
Laboratory </span></font><br>
<st1:address w:st="on"><st1:Street w:st="on"><font size=2 face=Verdana><span
style='font-size:10.0pt;font-family:Verdana'>2032 Todd Street</span></font></st1:Street><font
size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'> </span></font><br>
<st1:City w:st="on"><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>Eugene</span></font></st1:City><font size=2
face=Verdana><span style='font-size:10.0pt;font-family:Verdana'>, <st1:State
w:st="on">OR</st1:State> <st1:PostalCode w:st="on">97405</st1:PostalCode></span></font></st1:address><font
size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'> </span></font><br>
<font size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'>(541)
844-1960 </span></font><br>
<font size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'><a
href="mailto:michael.rosenberg@pnl.gov">michael.rosenberg@pnl.gov</a> </span></font><br>
<font size=2 color="#d47500" face=Verdana><span style='font-size:10.0pt;
font-family:Verdana;color:#D47500'><a href="http://www.pnl.gov">www.pnl.gov</a></span></font>
<o:p></o:p></p>
<u5:p></u5: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><font size=2 color=black 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'> Nick
Caton [<a href="mailto:ncaton@smithboucher.com">mailto:ncaton@smithboucher.com</a>]
<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, October 26, 2009
8:20 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Rosenberg, Michael I;
Crockett, Jim; Kendra Tupper<br>
<b><span style='font-weight:bold'>Cc:</span></b> <a
href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [Bldg-sim] Ashrae
90.1 - Unmet hours<u5:p></u5:p></span></font><o:p></o:p></p>
</div>
</div>
<p class=MsoNormal><u5:p><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></u5:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Mike,<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>I appreciate you
bringing this up. This definition drives straight to the heart of
defining the issue-at-hand… Since I kinda presented both sides of
the issue at once – I’d like to clarify where I stand regarding
what the correct interpretation <u>should be</u>. <u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>The logic is as
follows: If a modeled year has 8,760 hours, can there be 10,000 unmet
load hours? By strict reading of the standard’s definition below, I
would put my foot down stating there can <u>only</u> be 8,760, at most. <u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;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. <u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>My pure speculation
(for what it’s worth, as a young EIT) is this practice developed because
eQuest BDL reports don’t present the crunched numbers in a way that makes
the sum of unmet load hours, as intended by 90.1, easy to determine. I
wouldn’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.<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>If there’s
anything I’ve learned from going out on a limb, it’s that I’m
sure to learn something whether I fall or not!<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>~Nick<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><u5:p> </u5:p></span></font><o:p></o:p></p>
<div>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><img border=0
width=119 height=37 id="_x0000_i1026" src="cid:image001.jpg@01CA5700.DA9C3FD0"
alt="cid:489575314@22072009-0ABB"></span></font><o:p></o:p></p>
<u5:p></u5:p>
<p class=MsoNormal><b><font size=2 color="#2d4d5e" face="Stylus BT"><span
style='font-size:11.0pt;font-family:"Stylus BT";color:#2D4D5E;font-weight:bold'><u5:p> </u5:p></span></font></b><o:p></o:p></p>
<p class=MsoNormal><b><font size=2 color="#2d4d5e" face="Stylus BT"><span
style='font-size:11.0pt;font-family:"Stylus BT";color:#2D4D5E;font-weight:bold'>NICK
CATON, E.I.T.</span></font></b><o:p></o:p></p>
<u5:p></u5:p>
<p class=MsoNormal><font size=1 color="#cc9900" face=Calibri><span
style='font-size:7.5pt;font-family:Calibri;color:#CC9900'>PROJECT ENGINEER</span></font><o:p></o:p></p>
<u5:p></u5:p>
<p class=MsoNormal><font size=2 color="#2d4d5e" face=Calibri><span
style='font-size:10.0pt;font-family:Calibri;color:#2D4D5E'>25501 west valley
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color:#2D4D5E'> ks 66061<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#2d4d5e" face=Calibri><span
style='font-size:10.0pt;font-family:Calibri;color:#2D4D5E'>direct 913 344.0036<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#2d4d5e" face=Calibri><span
style='font-size:10.0pt;font-family:Calibri;color:#2D4D5E'>fax 913 345.0617<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><i><font size=2 color="#2d4d5e" face=Calibri><span
style='font-size:10.0pt;font-family:Calibri;color:#2D4D5E;font-style:italic'>Check
out our new web-site @ </span></font></i><font size=2 color="#1f497d"
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href="www.smithboucher.com" title="blocked::www.smithboucher.com"
moz-do-not-send=true><font size=2><span style='font-size:10.0pt'>www.smithboucher.com</span></font></a></span></font><u><font
size=2 color=blue face=Calibri><span style='font-size:10.0pt;font-family:Calibri;
color:blue'> </span></font></u><o:p></o:p></p>
</div>
<u5:p></u5:p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><u5:p> </u5:p></span></font><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><font size=2 color=black 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'>
Rosenberg, Michael I [<a href="mailto:michael.rosenberg@pnl.gov">mailto:michael.rosenberg@pnl.gov</a>]
<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, October 26, 2009
7:39 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Nick Caton; Crockett, Jim; <a
href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [Bldg-sim] Ashrae
90.1 - Unmet hours<u5:p></u5:p></span></font><o:p></o:p></p>
</div>
</div>
<p class=MsoNormal><u5:p><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></u5:p></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial'>Nick,<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial'>Your interpretation is the correct one. According to
the definitions in Standard 90.1.<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=definitions><b><i><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial;font-weight:bold;font-style:italic'>unmet
load hour:</span></font></i></b><font face=Arial><span style='font-family:Arial'>
an hour in which one or more zones is outside of the thermostat setpoint range.<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial'>Mike<u5:p></u5:p></span></font><o:p></o:p></p>
<div>
<p class=MsoNormal><b><font size=3 color="#d47500" face=Verdana><span
style='font-size:12.0pt;font-family:Verdana;color:#D47500;font-weight:bold'>__________________________</span></font></b>
<u5:p></u5:p><o:p></o:p></p>
<p class=MsoNormal><b><font size=3 color=black face=Verdana><span
style='font-size:12.0pt;font-family:Verdana;font-weight:bold'>Michael Rosenberg</span></font></b>
<br>
<font size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'>Senior
Commercial Buildings Energy Analyst</span></font> <br>
<font size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'>ENERGY
& ENVIRONMENT DIRECTORATE </span></font><u5:p></u5:p><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana'>Pacific Northwest National
Laboratory </span></font><br>
<st1:address w:st="on"><st1:Street w:st="on"><font size=2 face=Verdana><span
style='font-size:10.0pt;font-family:Verdana'>2032 Todd Street</span></font></st1:Street><font
size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'> </span></font><br>
<st1:City w:st="on"><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>Eugene</span></font></st1:City><font size=2
face=Verdana><span style='font-size:10.0pt;font-family:Verdana'>, <st1:State
w:st="on">OR</st1:State> <st1:PostalCode w:st="on">97405</st1:PostalCode></span></font></st1:address><font
size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'> </span></font><br>
<font size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'>(541)
844-1960 </span></font><br>
<font size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'><a
href="mailto:michael.rosenberg@pnl.gov">michael.rosenberg@pnl.gov</a> </span></font><br>
<font size=2 color="#d47500" face=Verdana><span style='font-size:10.0pt;
font-family:Verdana;color:#D47500'><a href="http://www.pnl.gov">www.pnl.gov</a></span></font>
<o:p></o:p></p>
<u5:p></u5:p>
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<p class=MsoNormal><b><font size=2 color=black 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'> <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><span style='font-weight:bold'>On Behalf Of </span></b>Nick Caton<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, October 26, 2009
5:33 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Crockett, Jim; <a
href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Bldg-sim] Ashrae
90.1 - Unmet hours<u5:p></u5:p></span></font><o:p></o:p></p>
</div>
</div>
<p class=MsoNormal><u5:p><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></u5:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Jim,<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>That’s
actually a really good question that I was afraid to ask when I first
encountered it – kudos to you! I’ve currently resolved to
follow what others seemed to be doing within and outside of my office:
Sum up all unmet hours for cooling and heating between the zones just as you
describe. In your example, I’d agree that the unmet hours of
your 301 zone building total 301.<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>I do agree that this
doesn’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 – I honestly can’t see any clear indication either way on
which is the appropriate interpretation. <u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>I think the
appropriate metric for ensuring appropriately sized systems should be something
like: “hours of the modeled year in which at least one zone has an unmet
cooling/heating load,” but I think that was avoided by all
concerned parties because it’s too wordy!<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;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).<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Afraid I’m
only really adding to the discussion here without providing a solid
answer. Would like to echo the desire to see anyone’s experiences
that would help us know the “right” way to interpret this (in my
case, specifically in the context of a LEED submittal).<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><u5:p> </u5:p></span></font><o:p></o:p></p>
<div>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><img border=0
width=119 height=37 id="Picture_x005f_x005f_x005f_x0020_1"
src="cid:image001.jpg@01CA5700.DA9C3FD0" alt="cid:489575314@22072009-0ABB"></span></font><o:p></o:p></p>
<u5:p></u5:p>
<p class=MsoNormal><b><font size=2 color="#2d4d5e" face="Stylus BT"><span
style='font-size:11.0pt;font-family:"Stylus BT";color:#2D4D5E;font-weight:bold'><u5:p> </u5:p></span></font></b><o:p></o:p></p>
<p class=MsoNormal><b><font size=2 color="#2d4d5e" face="Stylus BT"><span
style='font-size:11.0pt;font-family:"Stylus BT";color:#2D4D5E;font-weight:bold'>NICK
CATON, E.I.T.</span></font></b><o:p></o:p></p>
<u5:p></u5:p>
<p class=MsoNormal><font size=1 color="#cc9900" face=Calibri><span
style='font-size:7.5pt;font-family:Calibri;color:#CC9900'>PROJECT ENGINEER</span></font><o:p></o:p></p>
<u5:p></u5:p>
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style='font-size:10.0pt;font-family:Calibri;color:#2D4D5E'>25501 west valley
parkway<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><st1:City w:st="on"><st1:place w:st="on"><font size=2
color="#2d4d5e" face=Calibri><span style='font-size:10.0pt;font-family:Calibri;
color:#2D4D5E'>olathe</span></font></st1:place></st1:City><font size=2
color="#2d4d5e" face=Calibri><span style='font-size:10.0pt;font-family:Calibri;
color:#2D4D5E'> ks 66061<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#2d4d5e" face=Calibri><span
style='font-size:10.0pt;font-family:Calibri;color:#2D4D5E'>direct 913 344.0036<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#2d4d5e" face=Calibri><span
style='font-size:10.0pt;font-family:Calibri;color:#2D4D5E'>fax 913 345.0617<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><i><font size=2 color="#2d4d5e" face=Calibri><span
style='font-size:10.0pt;font-family:Calibri;color:#2D4D5E;font-style:italic'>Check
out our new web-site @ </span></font></i><font size=2 color="#1f497d"
face=Calibri><span style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><a
href="www.smithboucher.com" title="blocked::www.smithboucher.com"
moz-do-not-send=true><font size=2><span style='font-size:10.0pt'>www.smithboucher.com</span></font></a></span></font><u><font
size=2 color=blue face=Calibri><span style='font-size:10.0pt;font-family:Calibri;
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</div>
<u5:p></u5:p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><u5:p> </u5:p></span></font><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><font size=2 color=black 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'> <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><span style='font-weight:bold'>On Behalf Of </span></b>Crockett, Jim<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, October 26, 2009
4:27 PM<br>
<b><span style='font-weight:bold'>To:</span></b> <a
href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b><span style='font-weight:bold'>Subject:</span></b> [Bldg-sim] Ashrae 90.1 -
Unmet hours<u5:p></u5:p></span></font><o:p></o:p></p>
</div>
</div>
<p class=MsoNormal><u5:p><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></u5:p></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><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.
What exactly does this mean?<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>To illustrate my question:
assume you have a building with 301 zones, and each zone has 1 unmet hour
per year. This gives you a total of 301 unmet hours, and requires you to
increase your baseline equipment capacity. But you could argue that, on
average, the building has only 1 unmet hour per year.<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>Have any of you run into
this? Is it addressed in an addendum somewhere, etc?<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>Any help is
appreciated. Thanks,<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>Jim Crockett, P.E.</span></font><o:p></o:p></p>
<u5:p></u5:p>
<p class=MsoNormal><font size=3 color=black face="Courier New"><span
style='font-size:12.0pt;font-family:"Courier New"'> <u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>Senior Project Engineer</span></font><o:p></o:p></p>
<u5:p></u5:p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>Energy & Carbon
Management</span></font><o:p></o:p></p>
<u5:p></u5:p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>Nexant, Inc.</span></font><o:p></o:p></p>
<u5:p></u5:p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>4021 S. 700 E., <st1:address
w:st="on"><st1:Street w:st="on">Suite</st1:Street> 250</st1:address></span></font><o:p></o:p></p>
<u5:p></u5:p>
<p class=MsoNormal><st1:place w:st="on"><st1:City w:st="on"><font size=2
color=black face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New"'>Salt Lake City</span></font></st1:City><font size=2
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'>, <st1:State
w:st="on">Utah</st1:State> <st1:PostalCode w:st="on">84107</st1:PostalCode></span></font></st1:place><o:p></o:p></p>
<u5:p></u5:p>
<p class=MsoNormal><font size=3 color=black face="Courier New"><span
style='font-size:12.0pt;font-family:"Courier New"'> <u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>(801) 639-5603 - phone</span></font><o:p></o:p></p>
<u5:p></u5:p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>(801) 266-4786 - fax</span></font><o:p></o:p></p>
<u5:p></u5:p>
<p class=MsoNormal><font size=3 color=black face="Courier New"><span
style='font-size:12.0pt;font-family:"Courier New"'><u5:p> </u5:p></span></font><o:p></o:p></p>
<pre wrap=""><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre
style='text-align:center'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>
<hr size=4 width="90%" align=center>
</span></font></pre><pre><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>_______________________________________________<o:p></o:p></span></font></pre><pre><font
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