As I said, the -1 option is a workaround. It gets the simulation to act like it’s an unconditioned zone but it doesn’t change the actual property on the object.
Yet another option is to pass the zones you want to be unconditiond through the Create EP Plenum component like so:
Of, if you still want to keep all of the other schedules and loads, just make your own component with a few of lines of Python:
UnConditionZones.gh (459.6 KB)