A total energy system is a means for providing all of the varied energy requirements for a total plant from a single fuel source. This report evaluates some of the factors which are related to the development and use of total energy systems. The factors include--(1) initial and ultimate size of plant, (2) type and source of fuel, (3) sophistication of the system in the specific fuel, (4) rate of change for energy requirements in total plant, (5) availability of technical personnel to operate plant, (6) ability of organization to employ and retain such technical personnel, and (7) location of system and safety implication. The discussion mentions the conditions and limitations on installation of total energy systems, and stresses the questions to be resolved before making a commitment to this type of system. A list of questions which were raised after the presentation is included. (MM)