Inter zone air flow schedule based on inter zone temperature

Hello everybody,

Does anyone know if there is a way to control inter zone air flow schedule based on inter zone air temperature?
For example: I have two spaces, one is a sunspace (or Trombe wall) and the other is a bedroom. In winter, when the temperature in the sunspace (or Trombe wall) reaches 20 degrees, the air from the sunspce is introduced into the bedroom and the air from the bedroom is sent back to the sunspace. As shown in figure:

Apologies if this issue has been discussed before. I can’t find any reference.


I didn´t know a HB component to do that, although you can looking for EMS via additional strings.

@ chris
I look forward to your help. Thank you.