it should be pointed out that approximately the Escombreras Combined Cycle plant, and as a result of the redesign of the processes; 18,709 GJ were saved at the Aceca Combined Cycle plant due to changes in the start-up procedure; and a saving of 6,184 GJ was achieved at the Garoña Nuclear Plant due to the optimisation of the systems required for the implementation of requirements and tests for monitoring and control of the heating and air conditioning.