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<DIV><SPAN class=613334415-27102009><FONT face=Univers color=#0000ff size=2>I
believe that eQuest system and zone reports (SS-R and SS-F) only report unmet
hours when the fans are running. However, the percentage of total hours as
reported by the BEPU and BEPS reports use the entire year as the denominator (ie
8760). I've seen a previous LEED project accepted by stating that
there are fewer than 300 unmet hours based on the percentage reported on the
BEPS report (in that case it was 3% or 263 hours).
</FONT></SPAN></DIV>
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<DIV class=Section1>
<P class=MsoNormal dir=ltr align=left><FONT color=#0000ff><B><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial">Luka Matutinovic, </SPAN></B><SPAN
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style="FONT-SIZE: 9pt; FONT-FAMILY: Arial">., LEED<SUP>®</SUP>
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style="FONT-SIZE: 7.5pt; FONT-FAMILY: Arial"><FONT color=#0000ff>T.
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style="COLOR: black; mso-ansi-language: EN-CA"> </SPAN></STRONG><SPAN
class=GramE><STRONG><SPAN
style="FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: Verdana; mso-bidi-font-family: Arial">Please</SPAN></STRONG></SPAN><STRONG><SPAN
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consider the environment before printing this e-mail</SPAN></STRONG><SPAN
style="FONT-SIZE: 7.5pt; FONT-FAMILY: Arial"><o:p></o:p></SPAN></P></DIV></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Rosenberg,
Michael I<BR><B>Sent:</B> Tuesday, October 27, 2009 11:24 AM<BR><B>To:</B> ashu
gupta; Nick Caton; Crockett, Jim; Kendra Tupper<BR><B>Cc:</B>
bldg-sim@lists.onebuilding.org<BR><B>Subject:</B> Re: [Bldg-sim] Ashrae 90.1 -
Unmet hours<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Ashu,<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">I am in agreement
with everything you stated except possibly this;<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.25in; TEXT-ALIGN: justify">“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></P>
<P class=MsoNormal style="TEXT-ALIGN: justify"><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"><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: 10pt; FONT-FAMILY: 'Arial','sans-serif'"> <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"><o:p> </o:p></SPAN></P>
<DIV>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><B><SPAN
style="COLOR: #d47500; FONT-FAMILY: 'Verdana','sans-serif'">__________________________</SPAN></B>
<o:p></o:p></P>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><B><SPAN
style="FONT-FAMILY: 'Verdana','sans-serif'">Michael Rosenberg</SPAN></B>
<BR><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">Senior
Commercial Buildings Energy Analyst</SPAN> <BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">ENERGY &
ENVIRONMENT DIRECTORATE </SPAN><o:p></o:p></P></DIV>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">Pacific Northwest
National Laboratory </SPAN><BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">2032 Todd Street
</SPAN><BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">Eugene, OR 97405
</SPAN><BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">(541) 844-1960
</SPAN><BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">michael.rosenberg@pnl.gov
</SPAN><BR><SPAN
style="FONT-SIZE: 10pt; COLOR: #d47500; FONT-FAMILY: 'Verdana','sans-serif'">www.pnl.gov</SPAN>
<SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"><o:p></o:p></SPAN></P>
<DIV>
<DIV
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; PADDING-LEFT: 0in; PADDING-BOTTOM: 0in; BORDER-LEFT: medium none; PADDING-TOP: 3pt; BORDER-BOTTOM: medium none">
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'"> ashu gupta
[mailto:kce2@kamalcogentenergy.com] <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> 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> </o:p></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Arial','sans-serif'">Dear
All,<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Arial','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Arial','sans-serif'">Explanation
of Unmet Hours is as follows:<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Arial','sans-serif'"><o:p> </o:p></SPAN></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: l1 level1 lfo3">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 class=MsoNormal style="TEXT-ALIGN: justify; mso-list: l1 level1 lfo3">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 class=MsoNormal style="TEXT-ALIGN: justify; mso-list: l1 level1 lfo3">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: <o:p></o:p></P>
<P class=MsoNormal style="TEXT-ALIGN: justify">Visual DOE: “SS-J System Peak
Heating and Cooling Days” report &<o:p></o:p></P>
<P class=MsoNormal style="TEXT-ALIGN: justify">Energy Plus: Output Variable,
“Time Cooling Set point Not met”)<o:p></o:p></P>
<UL style="MARGIN-TOP: 0in" type=disc>
<LI class=MsoNormal style="TEXT-ALIGN: justify; mso-list: l2 level1 lfo6">When
two zones are unmet at the same hour, this will count to one unmet hour for
the building.<o:p></o:p>
<LI class=MsoNormal style="TEXT-ALIGN: justify; mso-list: l2 level1 lfo6">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-INDENT: 0.25in; TEXT-ALIGN: justify"><I>Example:
</I><o:p></o:p></P>
<P class=MsoNormal style="TEXT-INDENT: 0.25in; TEXT-ALIGN: justify">When each
zone is unmet in the specified hours as beside,<o:p></o:p></P>
<P class=MsoNormal
style="TEXT-INDENT: 0.25in; TEXT-ALIGN: justify"> <o:p></o:p></P>
<P class=MsoNormal style="TEXT-INDENT: 0.25in; TEXT-ALIGN: justify">Zone 1 unmet
during:
6
8
14 16<o:p></o:p></P>
<P class=MsoNormal style="TEXT-INDENT: 0.25in; TEXT-ALIGN: justify">Zone 2 unmet
during:
6
8
12 16<o:p></o:p></P>
<P class=MsoNormal style="TEXT-INDENT: 0.25in; TEXT-ALIGN: justify">Zone 3 unmet
during:
7
8
12 13<o:p></o:p></P>
<P class=MsoNormal
style="TEXT-ALIGN: justify">
<o:p></o:p></P>
<P class=MsoNormal style="TEXT-INDENT: 0.5in; TEXT-ALIGN: justify">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-INDENT: 0.5in; TEXT-ALIGN: justify">6
7
8
12
13
14 16<o:p></o:p></P>
<P class=MsoNormal style="TEXT-ALIGN: justify"> <o:p></o:p></P>
<UL style="MARGIN-TOP: 0in" type=disc>
<LI class=MsoNormal style="TEXT-ALIGN: justify; mso-list: l5 level1 lfo9">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 class=MsoNormal style="TEXT-ALIGN: justify; mso-list: l5 level1 lfo9">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 class=MsoNormal style="TEXT-ALIGN: justify; mso-list: l5 level1 lfo9">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: 10pt; COLOR: navy; FONT-FAMILY: 'Arial','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Arial','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Arial','sans-serif'">Thanks<o:p></o:p></SPAN></P>
<DIV>
<P style="MARGIN-BOTTOM: 12pt"><SPAN
style="FONT-SIZE: 10pt; 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="COLOR: #004080; FONT-FAMILY: 'Book Antiqua','serif'"><A
href="mailto:kce2@kamalcogentenergy.com"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman','serif'">kce2@kamalcogentenergy.com</SPAN></A><BR><A
href="http://www.kamalcogentenergy.com"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman','serif'">www.kamalcogentenergy.com</SPAN></A><o:p></o:p></SPAN></P></DIV>
<DIV>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center>
<HR align=center width="100%" SIZE=2>
</DIV>
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <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>
bldg-sim@lists.onebuilding.org<BR><B>Subject:</B> Re: [Bldg-sim] Ashrae 90.1 -
Unmet hours</SPAN><o:p></o:p></P></DIV>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; 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 “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.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"><o:p> </o:p></SPAN></P>
<DIV>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><B><SPAN
style="COLOR: #d47500; FONT-FAMILY: 'Verdana','sans-serif'">__________________________</SPAN></B>
<o:p></o:p></P>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><B><SPAN
style="FONT-FAMILY: 'Verdana','sans-serif'">Michael Rosenberg</SPAN></B>
<BR><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">Senior
Commercial Buildings Energy Analyst</SPAN> <BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">ENERGY &
ENVIRONMENT DIRECTORATE </SPAN><o:p></o:p></P></DIV>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">Pacific Northwest
National Laboratory </SPAN><BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">2032 Todd Street
</SPAN><BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">Eugene, OR 97405
</SPAN><BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">(541) 844-1960
</SPAN><BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">michael.rosenberg@pnl.gov
</SPAN><BR><SPAN
style="FONT-SIZE: 10pt; COLOR: #d47500; FONT-FAMILY: 'Verdana','sans-serif'">www.pnl.gov</SPAN>
<SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"><o:p></o:p></SPAN></P>
<DIV>
<DIV
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; PADDING-LEFT: 0in; PADDING-BOTTOM: 0in; BORDER-LEFT: medium none; PADDING-TOP: 3pt; BORDER-BOTTOM: medium none">
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'"> Nick Caton
[mailto:ncaton@smithboucher.com] <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> 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> </o:p></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Mike,<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">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>. <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">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. <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">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. <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">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.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">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!<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">~Nick<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<DIV>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><IMG
id=_x0000_i1026 height=37 alt=cid:489575314@22072009-0ABB
src="cid:613334415@27102009-2ECA" width=119 border=0></SPAN><B><SPAN
style="FONT-SIZE: 11pt; COLOR: #2d4d5e; FONT-FAMILY: 'Stylus BT','sans-serif'"><o:p></o:p></SPAN></B></P>
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 11pt; COLOR: #2d4d5e; FONT-FAMILY: 'Stylus BT','sans-serif'"><o:p> </o:p></SPAN></B></P>
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 11pt; COLOR: #2d4d5e; FONT-FAMILY: 'Stylus BT','sans-serif'">NICK
CATON, E.I.T.</SPAN></B><B><SPAN
style="COLOR: #2d4d5e; FONT-FAMILY: 'Stylus BT','sans-serif'"><o:p></o:p></SPAN></B></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 7.5pt; COLOR: #cc9900; FONT-FAMILY: 'Calibri','sans-serif'">PROJECT
ENGINEER</SPAN><SPAN
style="FONT-SIZE: 7.5pt; COLOR: #cc9900"><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: #2d4d5e; FONT-FAMILY: 'Calibri','sans-serif'">25501
west valley parkway<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: #2d4d5e; FONT-FAMILY: 'Calibri','sans-serif'">olathe
ks 66061<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: #2d4d5e; FONT-FAMILY: 'Calibri','sans-serif'">direct
913 344.0036<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: #2d4d5e; FONT-FAMILY: 'Calibri','sans-serif'">fax
913 345.0617<o:p></o:p></SPAN></P>
<P class=MsoNormal><I><SPAN
style="FONT-SIZE: 10pt; COLOR: #2d4d5e; FONT-FAMILY: 'Calibri','sans-serif'">Check
out our new web-site @ </SPAN></I><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><A
title=blocked::www.smithboucher.com href="www.smithboucher.com"><SPAN
style="FONT-SIZE: 10pt">www.smithboucher.com</SPAN></A></SPAN><U><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Calibri','sans-serif'">
</SPAN></U><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p></o:p></SPAN></P></DIV>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<DIV>
<DIV
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; PADDING-LEFT: 0in; PADDING-BOTTOM: 0in; BORDER-LEFT: medium none; PADDING-TOP: 3pt; BORDER-BOTTOM: medium none">
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'"> Rosenberg, Michael
I [mailto:michael.rosenberg@pnl.gov] <BR><B>Sent:</B> Monday, October 26, 2009
7:39 PM<BR><B>To:</B> Nick Caton; Crockett, Jim;
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> </o:p></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Nick,<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Your interpretation
is the correct one. According to the definitions in Standard
90.1.<o:p></o:p></SPAN></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.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Mike<o:p></o:p></SPAN></P>
<DIV>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><B><SPAN
style="COLOR: #d47500; FONT-FAMILY: 'Verdana','sans-serif'">__________________________</SPAN></B>
<o:p></o:p></P>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><B><SPAN
style="FONT-FAMILY: 'Verdana','sans-serif'">Michael Rosenberg</SPAN></B>
<BR><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">Senior
Commercial Buildings Energy Analyst</SPAN> <BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">ENERGY &
ENVIRONMENT DIRECTORATE </SPAN><o:p></o:p></P></DIV>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">Pacific Northwest
National Laboratory </SPAN><BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">2032 Todd Street
</SPAN><BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">Eugene, OR 97405
</SPAN><BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">(541) 844-1960
</SPAN><BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">michael.rosenberg@pnl.gov
</SPAN><BR><SPAN
style="FONT-SIZE: 10pt; COLOR: #d47500; FONT-FAMILY: 'Verdana','sans-serif'">www.pnl.gov</SPAN>
<SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"><o:p></o:p></SPAN></P>
<DIV>
<DIV
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; PADDING-LEFT: 0in; PADDING-BOTTOM: 0in; BORDER-LEFT: medium none; PADDING-TOP: 3pt; BORDER-BOTTOM: medium none">
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Nick
Caton<BR><B>Sent:</B> Monday, October 26, 2009 5:33 PM<BR><B>To:</B> Crockett,
Jim; 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> </o:p></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Jim,<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">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.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">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. <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">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!<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">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).<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">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).<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<DIV>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><IMG
id=Picture_x005f_x0020_1 height=37 alt=cid:489575314@22072009-0ABB
src="cid:613334415@27102009-2ECA" width=119 border=0></SPAN><B><SPAN
style="FONT-SIZE: 11pt; COLOR: #2d4d5e; FONT-FAMILY: 'Stylus BT','sans-serif'"><o:p></o:p></SPAN></B></P>
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 11pt; COLOR: #2d4d5e; FONT-FAMILY: 'Stylus BT','sans-serif'"><o:p> </o:p></SPAN></B></P>
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 11pt; COLOR: #2d4d5e; FONT-FAMILY: 'Stylus BT','sans-serif'">NICK
CATON, E.I.T.</SPAN></B><B><SPAN
style="COLOR: #2d4d5e; FONT-FAMILY: 'Stylus BT','sans-serif'"><o:p></o:p></SPAN></B></P>
<P class=MsoNormal><SPAN
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<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Crockett,
Jim<BR><B>Sent:</B> Monday, October 26, 2009 4:27 PM<BR><B>To:</B>
bldg-sim@lists.onebuilding.org<BR><B>Subject:</B> [Bldg-sim] Ashrae 90.1 - Unmet
hours<o:p></o:p></SPAN></P></DIV></DIV>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; 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?<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN style="FONT-SIZE: 10pt; 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.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">Have any of you run into
this? Is it addressed in an addendum somewhere, etc?<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">Any
help is appreciated. Thanks,<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">Jim
Crockett, P.E.</SPAN><SPAN
style="FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Courier New'"> <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
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<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">Nexant, Inc.</SPAN><SPAN
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<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">4021 S. 700 E., Suite
250</SPAN><SPAN style="FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">Salt Lake City, Utah
84107</SPAN><SPAN style="FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></P>
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