Model predicting the state of the window with the outdoor air temperature and occupancy.
When the space is unoccupied, the window is always closed. When the space is occupied, the lower the outdoor temperature is, the lower the chance to open the window.
The model is documented in the paper "Nicol, J.F., 2001, August. Characterising occupant behaviour in buildings: towards a stochastic model of occupant use of windows, lights, blinds, heaters and fans. In Proceedings of the seventh international IBPSA conference, Rio (Vol. 2, pp. 1073-1078)."
The model parameters are regressed from the field study in 7000 naturally ventilated buildings in Pakistan.