So:
- I create my empty AirLoop, and
- I added an Outdor Air System,
- I choose my Thermal Zones
- In the Thermal Zone, I put an humidstat.
- The Humidstat has a setpoint, fixed on 50% maximum and 30% minimum (but I try also to change the values : nothing changes)
- Add a Air Terminal Single Duct Uncontrolled Diffuser ,
- and finally I place my Unitary System near the OAS
The result is: relative humidity 100% sll the time, never under 80%! I don't understand what i did wrong...