- Abstract A new thermal simulation model, QUICK II, is presented and numerous verification case studies performed on naturally ventilated buildings are discussed. Four new case studies performed on two buildings located in the Negev desert in Israel are discussed in detail. All the measurements pertaining to these new case studies were taken independently by the Desert Architecture Unit of the Jacob Blaustein Institute for Desert Research. These measurements are provided, along with a description of the buildings. The verification results show a good correlation between the measured and simulated parameters. The simulated temperatures were found to be within 1 °C of the measured temperatures for 73% of the time, and within 2 °C for 95% of the time.