[Bldg-sim] PIU vs. VAV

Matthew Dubrovich mdubrovich at emcengineers.com
Wed Nov 19 08:53:36 PST 2008

Question on PIU vs. VAV systems in eQuest...


If a PIU system has only SVAV boxes and all other parameters are
identical, does the PIU act like a VAV in eQuest?  Only changing the
system type in my model seems to have a significant impact on energy
usage and I can't track down why that is.  The difference is significant
enough that with App. G System 7 VAV w/RH, the choice between PIU and
VAV has an effect on the number of points.  Any thoughts would be







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