indoor temperature

edit

I think you are trying to cool down (decrease room air temperature of) your thermal zone using natural ventilation, right? Recently, I used EnergyPlus EMS sensors and actuators to open windows of a thermal zone during occupied period.

See below the way I defined actuators and sensors;

    EnergyManagementSystem:Actuator,
    Flow_Actuator37, ! Name
    Block1:Zone1_Wall_5_0_0_14_0_14_Win, ! Component Name
    AirFlow Network Window/Door Opening, ! Component Type
    Venting Opening Factor; ! Control Variable

    EnergyManagementSystem:Sensor,
    E01airTemperature,          !- Name
    Block1:Zone1,              !- Output:Variable or Output:Meter Index Key Name
    Zone Mean Air temperature;  !- Output:Variable or Output:Meter Name

    EnergyManagementSystem:Sensor,
    Occu_Schedule, !- Name
    Office_OpenOff_Occ,    !- Output:Variable or Output:Meter Index Key Name   Occupancy Schedule
    Schedule Value;  !- Output:Variable or Output:Meter Name

One sensor is for occupancy schedule and the second one is for zone air temperature.

P.S: There are other ways of simulating natural ventilation in EnergyPlus as well.