Using Energyplus for modelling a residential house.

My aim is to reduce energy consumption by varying various parameters of the building. My comfort model is a new relation between outdoor and indoor temperature. I have set up my Airflow network for modelling natural ventilation. Since I am only concerned with the energy use for cooling and heating I'm using Ideal Loads to provide cooling and heating.

Now I would like to set-up my cooling and heating set points to be modified according to the temperature differences.

Any recommendations?