Sim List,

ASHRAE system 3 is, Packaged Single Zone Air Conditioner
(PSZ-AC). The description of PSZ-AC says, "Packaged rooftop air
conditioner". I assume that this means a single unit serving multiple
zones. This doesn't seem to make sense since the name contains the
phrase 'single zone'.

I have a building with baseline system 3, PSZ-AC and I'm
not sure how to apply this system. The proposed building has a variety
of systems. Should I have a system per zone or a single unit for the
building?

Thanks

Eric Youngson