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<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>
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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>
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