Earth contact cooling has become a well known technique for the cooling of buildings. One variant of the technique involves the direct burial of a pipe at some depth in the ground. By drawing warm air through the tube, heat is absorbed through the walls of the cooling tube by the earth surrounding the tube and, thus, cooled air is drawn into the building. The preliminary results of the cooling field of the Passive Solar Research Group are presented in this paper. Most models to date attempt to model the performance of a single tube and then to generalize results as parameters such as diameter or length are altered. These generalizations are usually accomplished without actual data to corroborate model predictions. For the Nebraska experiments, a series of measurements were conducted as the parameters of diameter and length were changed. Three fields of temperature sensors emanate horizontally and vertically from each of the buried pipes. Inlet and outlet temperatures as well as temperatures along the length of the tube were monitored. In addition to tube length, flowrate and tube diameter, it was found that cooling is highly dependent on the temperature difference between ambient and soil temperature. Also, the greatestmore » temperature drops were found to occur at the inlets of each tube.« less