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<DIV><FONT face=Arial size=2>Hi All,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><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></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><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></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Typically:</FONT></DIV>
<DIV><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></DIV>
<DIV><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></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><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. </FONT><FONT face=Arial size=2>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></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Many thanks in advance for your
responses.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Wade</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><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></DIV><PRE>
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