Hello, I am a student working in OS (3.1.0) modelling a residential building. To have an balanced air flow in every zone we are adding the "add zone mixing object". I was wondering if someone could explain more in detail what this object does. I know that you enter a zone exhaust (for example kitchen) and a source zone (for example living) and a airflow in (cfm). This means that air only goes from one zone to the other and not reverse? The airflow is constant and needs to be in cfm? (So I have to calculate from m^3/hour to cfm) I can ad as many zone mixing objects to a zone as I want? The most information I have found on this question.

Is it possible to supply used air to a room and then again to a room with exhaust fan. For example air form kitchen (inlet) to income and then again use the air in the income to the toilet (exhaust)?

Does someone have any tips or advice of other objects I could use to simulate the residential building?