[Bldg-sim] EE4 - Multiple systems

B. Fountain bfountain at greensim.com
Wed Jun 16 20:23:00 PDT 2010

Like all DOE-2 based programs, EE4 is limited to 1 system serving a zone. 
That said, what you are describing sounds like a packaged VAV system with
zonal heating and/or reheat.  The issue seems to be the "main system"
which sounds like a make-up air unit which you would have to work into the
PVAV for fan energy and heat recovery (if applicable).

> Hello All,
> I am having difficulty modeling a certain system type in EE4. The main
> system is AHU's supplying packaged rooftop dx units. The zone system
> comprises of perimeter hydronic baseboards for heating and VAV boxes for
> ventilation and cooling.
> I'm not sure it is permitted in EE4 to mix this number of system types.
> Any guidance would be much appreciated.
> --
> Chris Flood BSc (Eng)
> Senior Building Analyst & Energy Modeller
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