This work involves the modeling of window air conditioners, with the purpose to obtain the electrical potential consume by itself, related to the medium external temperature. To obtain such goal, it was necessary the study of all features which involve their several components, aiming the conduct fitted from the parts, due to the result expected. It was made a public research with the users from these equipments. From this result, it was developed a stochastic model to be used in energy demand from a specific region, considering that the equipment / machine in use shows similar qualifications. After that, it was added to the system of machine a direct load control, which delay the compressor, obtaining an efficient working from it (saving demand), without affecting deeply normal using conditions. Finally, comparing two examples mentioned above, it was concluded that in the less powerful equipment (air conditioner) the thermal control with changed features, had good results, while more powerful equipments are more economic with direct load control.