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<DIV><SPAN class=722420417-23072007><FONT face=Arial size=2>Hello
all,</FONT></SPAN></DIV>
<DIV><SPAN class=722420417-23072007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=722420417-23072007><FONT face=Arial size=2>I am currently
working on the ASHRAE 90.1-2004, Appendix G baseline model of a hospital in
Oregon. The part of the building being analyzed is a 40,000 sf, 3 story addition
to an already existing building of approximately 90,000 sf. I am having some
issues determining what to use for the baseline HVAC system. Here are some key
details of the current as-designed building:</FONT></SPAN></DIV>
<UL>
<LI><SPAN class=722420417-23072007><FONT face=Arial size=2>Reheat fan
system</FONT></SPAN></LI>
<LI><SPAN class=722420417-23072007><FONT face=Arial size=2>Constant volume,
60,000 cfm</FONT></SPAN></LI>
<LI><SPAN class=722420417-23072007><FONT face=Arial size=2>100% outside
air</FONT></SPAN></LI>
<LI><SPAN class=722420417-23072007><FONT face=Arial size=2>Draws heat from two
boilers and two chiller in <STRONG><FONT color=#0000ff>a central utility plant
that also serves the rest of the
building</FONT></STRONG></FONT></SPAN></LI></UL>
<DIV><SPAN class=722420417-23072007><FONT face=Arial size=2>These design
parameters lead to some confusion when selecting the HVAC baseline systems. For
example:</FONT></SPAN></DIV>
<UL>
<LI><SPAN class=722420417-23072007><FONT face=Arial size=2><FONT
color=#0000ff><STRONG>Since the addition is served by a system that serves the
<EM>entire </EM>building, should building be modeled as an ~130,000 sf
building?</STRONG> </FONT>This would make it System 5 under Table G3.1.1A.
Problems with this are that it calls it out to be a PVAV w/ reheat, which is
not a legitimate comparison. If the baseline is supposed to be PVAV, the OSA
requirements need to be the same anyways (G3.1.2.5), therefore effectively
making it a constant volume system.</FONT></SPAN></LI>
<LI><SPAN class=722420417-23072007><FONT face=Arial color=#0000ff size=2><FONT
color=#000000><STRONG><FONT color=#0000ff>Should the sf be taken relative to
only the addition (40,000 sf)?</FONT> </STRONG>This is also not a fair
comparison between the two systems because the addition draws heating and
cooling from a system designed for a much larger square footage.</FONT>
</FONT></SPAN></LI></UL>
<DIV><SPAN class=722420417-23072007><FONT face=Arial size=2>I guess my main
questions are <STRONG><FONT color=#0000ff>if anyone has dealt with large,
constant volume, 100% OSA systems</FONT></STRONG> <STRONG><FONT
color=#0000ff>and their baseline HVAC systems</FONT></STRONG> and if anyone has
<STRONG><FONT color=#0000ff>modeled additions that are served by a larger
CUP.</FONT></STRONG></FONT></SPAN></DIV>
<DIV><FONT color=#0000ff><SPAN class=722420417-23072007><STRONG><FONT face=Arial
color=#000000 size=2></FONT></STRONG></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff><SPAN class=722420417-23072007><FONT face=Arial
color=#000000 size=2>Thanks for any help in advance.</FONT></SPAN></FONT></DIV>
<DIV><FONT color=#0000ff><SPAN class=722420417-23072007><FONT face=Arial
color=#000000 size=2></FONT></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff><SPAN class=722420417-23072007><FONT face=Arial
size=2></FONT><FONT face=Arial size=2></FONT><FONT face=Arial size=2></FONT>
<DIV><FONT face=Arial size=2></FONT><BR><STRONG><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><FONT color=#000000>Dana Troy<SPAN
class=722420417-23072007>, EIT</SPAN></FONT></SPAN></STRONG></DIV>
<DIV><STRONG><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></STRONG><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN><FONT color=#000000><FONT
face=Arial size=2>Energy Analyst </FONT><BR><BR></FONT><A
href="http://www.glumac.com/"><FONT color=#000000><IMG
src="http://www.glumac.com/glumacsig.gif" border=0></FONT></A><FONT
color=#000000> </FONT></DIV>
<DIV><FONT color=#000000>
<HR style="WIDTH: 330px; HEIGHT: 2px" align=left width=330 color=#9acb33 noShade
SIZE=2>
</FONT></DIV>
<DIV><FONT color=#000000></FONT></DIV>
<DIV><FONT color=#000000><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt">320 SW
Washington, Suite 200</SPAN><BR><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt">Portland,
OR 97204-2640</SPAN><BR><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt">T.
503.227.5280<SPAN style="mso-spacerun: yes"> </SPAN>F.
503.274.7674</SPAN></FONT></DIV>
<DIV><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"><FONT
color=#000000>D. 503.345.6286</FONT><BR><BR><STRONG><SPAN
style="FONT-SIZE: 10pt; COLOR: #333333; FONT-FAMILY: Arial">Thinking. Inside the
building.</SPAN></STRONG><BR><STRONG><SPAN
style="FONT-WEIGHT: normal; FONT-SIZE: 10pt; COLOR: #333333; FONT-FAMILY: Arial"><A
href="http://www.glumac.com/">www.glumac.com</A></SPAN></STRONG></SPAN>
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