Co-generation is the combined production of electricity and heat from the same original source of energy. Co-generation of electricity and heat is an ideal application of natural gas, achieving simultaneous production of electricity and heat (steam and/or hot water) by the same equipment. Co-generation technology on the same device allows the production of both electricity and heat by natural gas combustion. The produced heat, in the form of steam or hot water, or even exhaust fumes, can be used for simultaneous cooling.

On 30/09/2023, the merger of the Distribution Network Operations EDA THESS and EDA ATTICA was completed with their absorption by the Distribution Network Operator DEDA, which becomes the universal successor of all rights, obligations and in general all legal relations of the absorbed Operators.