To investigate the characteristics of exhaust heat out of air conditioning equipment to outside air is very important. Using four representative types of heat source systems, an analysis was made with a model building by varying the quantity of internally generated heat, both with and without total enthalpy heat exchangers. The quantity and characterisitics of exhaust heat differ with heat source systems in summer. In winter the quantity of exhaust heat from the equipment is small overall. Next, the characteristics of artificial generated heat are changed to the characteristics of artificial exhaust heat that include all latent heat transfer. The chracteristics of artificial exhaust heat are different from characterisitics of artificial generated heat or characteristics of exhaust heat out of the equipment
