EMS does not turn off ideal load
Dear colleagues,
I am working on the development of mixed-mode ventilation, using EnergyPlus.
My MMV strategy is focused on passive design building with high air tightness (0.05 ACH, referring tothe PassiveHaus standard)
I am using the zone ideal load system and EMS to operate MMV.
My algorithm switches modes according to indoor and outdoor temperature.
EMS turns off zone ideal load system during natural ventilation mode, but in the results, ideal load system is not forced to off.
If you have idea, please share the solutions with me.




How are you switching modes with EMS? By actuating its availability status? Or overriding its mass flow rate? There are caveats to consider (CTRL-F "Ideal Loads Air System" here). Consider sharing your IDF.
I applied only the available schedule and setpoint.
I've attached the idf file.
link text
@Selma Inger : IDF v9.4 is pretty old now (circa 2020, pre-ARM installers). Hopefully someone has an E+ v9.4 lying around. You can always share an updated version, e.g. anything above v22.1 (2022).