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<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=729291316-02062003>Wade,</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=729291316-02062003></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=729291316-02062003>We are
in the process of submitting a CIR that will explicitly state the method we are
using and the fundamentals behind it that meet the intent of the
Exceptional Calculation Method as stated in ASHRAE 90.1. We also feel there is
conflicting information on this and are hoping to clarify the
issue.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=729291316-02062003></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=729291316-02062003><FONT
face=Arial size=2>__________________________________________________</FONT>
<BR><FONT face=Arial size=2>Peter Alspach</FONT> <BR><FONT face=Arial
size=2>Mechanical Engineer</FONT> </DIV>
<DIV>
<P><FONT face=Arial color=#000000 size=2>ARUP</FONT> <BR><FONT face=Arial
size=2>901 Market Street, Suite 260, San Francisco, CA 94103</FONT> <BR><FONT
face=Arial size=2>T 415-957-9445</FONT> <BR><FONT face=Arial size=2>D
415-946-0284</FONT> <BR><FONT face=Arial size=2>F 415-957-9096</FONT> <BR><FONT
face=Arial size=2>peter.alspach@arup.com</FONT> <BR><FONT face=Arial
size=2>www.arup.com</FONT> </P><BR></SPAN></FONT></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Wade McLaughlin
[mailto:wmclaughlin@dmiinc.com]<BR><B>Sent:</B> Monday, June 02, 2003 8:48
AM<BR><B>To:</B> BLDG-SIM@GARD.COM<BR><B>Cc:</B>
BLDG-SIM@GARD.COM<BR><B>Subject:</B> [BLDG-SIM] LEED / ASHRAE 90.1 Modeling
Question<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>Thanks for your reply.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I re-read a CIR from 6/7/2001 (perhaps the one to
which you are referring?) to be sure that I hadn't missed anything. In
the Project Manager's Ruling, it says:"Under the ECM [Exceptional Calculation
Method], schedule variations may be used as a basis of engineering
calculations for discrete measures that are precluded by the reference
standard or the LEEDTM EMP."</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>However, the description of the
ECM in section 11.5 of the 90.1 manual states that the applicant must
provide documentation supporting the accuracy of the exceptional method and
that "This documentation must also show that the methods and its
results:</FONT></DIV>
<DIV><FONT face=Arial size=2>1. Do not change the simulation program input
parameters that are constrained by the ECM method or any other rules of the
adopting authority. For example, the exceptional method may not violate
the rule against using different operating schedules for proposed and budget
runs."</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>So it is still unclear to me whether or
not schedule changes are acceptable. Have you
successfully proposed schedule changes such as these through the ECM
process?</FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=sheffer@paonline.com href="mailto:sheffer@paonline.com">Marcus
Sheffer</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=wmclaughlin@dmiinc.com
href="mailto:wmclaughlin@dmiinc.com">wmclaughlin@dmiinc.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Cc:</B> <A title=BLDG-SIM@GARD.COM
href="mailto:BLDG-SIM@GARD.COM">BLDG-SIM@GARD.COM</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, June 02, 2003 11:04
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [BLDG-SIM] LEED / ASHRAE
90.1 Modeling Question</DIV>
<DIV><FONT face=Arial size=2></FONT><BR></DIV>I'd suggest you review the
CIRs more closely. DCV has been approved as an energy saving measure
and you can modify schedules to simulate savings. You must follow the
Exceptional Calculation Method (section 11.5) of the Energy Cost Budget
Method of 90.1.<BR><BR>At 10:14 AM 06/02/2003 -0400, you wrote:<BR>
<BLOCKQUOTE class=cite cite="" type="cite"><FONT face=arial size=2>Hi
All,</FONT><BR> <BR><FONT face=arial size=2>We are currently working
on our first LEED certification project. We use PowerDOE as a
modeling tool, but these questions should apply to all modeling
platforms.</FONT><BR> <BR><FONT face=arial size=2>The LEED process
requires modeling practices to follow those outlined in the ASHRAE 90.1
Standard User's Manual. The standard does not allow for the
augmentation of schedules to model efficiency measures. This is a
problem for us in that we often use schedules to simulate measures such as
lighting occupancy sensors and demand controlled
ventilation.</FONT><BR> <BR><FONT face=arial
size=2>Typically:</FONT><BR><FONT face=arial size=2>-For lighting
occupancy sensors, we adjust our known office schedules using a profile
taken from the JIES (I'm afraid I don't have the specific source in front
of me).</FONT><BR><FONT face=arial size=2>-For demand controlled
ventilation, we develop an hourly outside air Fraction of Design schedule
for each AHU using known occupancy schedules and an assumption of 20 CFM
per occupant.</FONT><BR> <BR><FONT face=arial size=2>To us, both of
these methods seem to be accepted modeling practice for determining
measure performance. However, as stated pretty explicitly in the
archived credit interpretation requests (CIRs) on the LEED site, LEED
won't allow for the adjustment of schedules to simulate these
measures. Does anyone have a method (or insight into developing a
method) for either of these calculations in a manner that would be
acceptable for the LEED process?</FONT><BR> <BR><FONT face=arial
size=2>Many thanks in advance for your
responses.</FONT><BR> <BR><FONT face=arial
size=2>Wade</FONT><BR> <BR><FONT face=arial size=2>Wade
McLaughlin<BR>DMI<BR>450 Lexington St.<BR>Newton, MA 02466<BR>p
617-527-1525 x103<BR>f 617-527-6606</FONT><BR><BR><PRE>You received this e-mail because you are subscribed
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</PRE><FONT face="Courier New, Courier"></FONT></BLOCKQUOTE><X-SIGSEP>
<P></X-SIGSEP><FONT face="Abadi MT Condensed Light" color=#008000
size=4>Marcus B.
Sheffer
energy & environmental consulting<BR>Energy
Opportunities
717-292-2636<BR>1200 E Camping Area
Road Fax:
717-292-0585 <BR>Wellsville, PA USA
17365-9783
sheffer@sevengroup.com<BR>a Seven Group member company <A
href="http://www.sevengroup.com/"
eudora="autourl"><U>www.sevengroup.com</A><BR></FONT></U></P></BLOCKQUOTE><PRE>=====================================================You received this e-mail because you are subscribed
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