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<DIV><FONT face=Arial size=2>I recently encountered this same issue. I
found out if I switched the system type to a Powered Induction Unit that
the model would have variable flow. Another place to look at is your
thermostat type, some systems default to either proportional or reverse
action which effects how VAV boxes respond to heating and cooling
loads.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Joe Hager<BR>DMI<BR>450 Lexington St.<BR>Newton, MA
02466<BR>voice: 617-527-1525 ext. 102<BR>fax: 617-527-6606</FONT> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=keirh@bluestoneenergy.com
href="mailto:keirh@bluestoneenergy.com">Keir Howell</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</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, August 30, 2004 11:25
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [BLDG-SIM] Modeling 100% OA VAV
systems in eQuest</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2></FONT><FONT face=Arial size=2>Hello. Whenever I
try to model a VAV system with 100% OA in eQuest, I end up with a constant
volume system. It seems to be multiplying the Minimum OA Ratio (which I have
set at 1.00) by the design air flow, rather than the hourly air flow, even
though I have set the Minimum OA Method to "Fraction of Hourly Flow". As far
as I know, I have not set any other variables (such as zonal settings) that
might override the system settings. Please help. Thanks,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Keir Howell<BR>Bluestone Energy Services,
Inc.<BR>phone: 781-356-8865<BR>fax:
781-356-8864</FONT></DIV><PRE>
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