Dear List,
I'm working on a project that is looking to compare simple PSZ rooftop
units with Direct evaporitive cooling and gas furnace. When I make the
switch, I change "HVAC system type" to Evaporative Cool then add Supply
cfm as prompted and "Evaporitive Cooler Type" to Ditect on the air side
"Cooling - Evaporitive Cooling" display mode under air side systems.

After these changes I see the expected drop in cooling energy use and a
rise in fan energy use since the baseline had small fan power and the
evaporative uses the units spec'ed fan power. The strange part is that
the heating energy rises significantly. While I made no intentional
changed to the heating side of the units I did notice that the monthly
peak demands went down while the usage went up sio the heating seems to
be running more hours after the change to evap cooling....

Should I just schedule the heater off? I would love to have a more
elegant solution.

Attached are two versions of the model before and after the change. Any
advice is appreciated.

Thanks!!!!
Jacob