HB Natural ventilation

So, for my study i am modelling a box model where the heating and cooling set points are at 18C and 26C (adaptive thermal comfort range) what should be done in the VentControl because i also want to include natural ventilation in the cooling but i am not able to figure out the 4 parameters i.e. min in and out temp and max in and out temp. @chris could you enlighten me on how this actually works