In EP-launch I have investigated the "ZoneHVAC:IdealLoadAirSystem" and the last field is the "Design Specification ZoneHVAC Sizing Object Name".
What does it mean for the "ZoneHVAC:IdealLoadAirSystem"'s way of working, if I activate the last field by writing a name (and of course also have specified/defined this name in a "Design Specification ZoneHVAC Sizing")??
Is it okay to not fill out this last field?