My career in building energy management and energy modeling began in the fourth quarter of 1973 when the “Oil Embargo” occurred. I was a military systems design engineer with Texas Instruments Inc. (TI) and a member of a small group that simulated or modeled systems by computers for the purpose of design and evaluating the performance of the systems. The systems we modeled, for which I was personally involved with, included the Shrike missile flight and control, laser guided bombs, the gas dynamics of pneumatic actuators, cannon internal explosion and projectile exit speed, the dynamics and impact of electronics with soil, and the dynamics of metal compression. This experience led me to the task, in 1974, of modeling the energy consumption of TI buildings for the purpose of defining what could be done to reduce energy consumption. I used building energy computer programs available at the time that were based on simulating the yearly energy use of a building using utility bills. I became convinced that the need was for a building energy model that could model the last 24 hours of energy use and could also model the real-time energy use of a building at any hour. To accomplish this, a building energy model would require the same level of detail and sophistication as was required to model military systems. I spent years looking for this 24-hour building energy model, but it never appeared. Upon retiring, I decided to develop my own building energy model. Here is the first of a series of papers that verify the System Energy Equilibrium (SEE) Model.