In the United States buildings account for 40% of our nation’s energy which is twice as much as automobiles. Half of this energy is consumed by the heating, ventilation, and air conditioning systems (HVAC). Reducing the building’s energy consumption will not only reduce the energy cost, but also consume fewer natural resources. With the United States facing high energy prices due to increased dependence on limited natural resources, it is important to reduce the unnecessary energy consumption in buildings. The Student Health Building on the University of California, Santa Barbara campus was built in the late 1960s and currently has an HVAC system that is managed and controlled inefficiently, costing the university approximately $147,000 each year. Correcting this inefficiency requires a greater understanding of the building’s thermodynamics. An energy model of the building enables the understanding of these thermodynamics, and how occupants, weather, and equipment influence the energy performance of the building.  In this study, computer model simulations will be used to test alternative control strategies to help reduce energy consumption while maintaining occupant comfort. The analysis primarily focuses on the components responsible for controlling the building’s temperature. We envision that changing the control strategy for the HVAC in the building will ultimately lead to 10-20% energy usage reduction.