According to PGE, high-efficiency cogeneration should be one of the criteria defining an efficient heating and cooling system also after 2035. PGE is also calling for changes to the definition of an efficient heating and cooling system proposed in July 2021, allowing for full use of high-efficiency cogeneration. Nevertheless, any changes to the EU legislation should be implemented within a reasonable timeframe, taking into account technological possibilities and the specific characteristics of district heating systems in Member States.