The following persons or entities in the promotion of the use of renewable energy sources 1.1. Use of biomass as fuel for thermal energy production: private companies and self-employed workers. self-employed workers. 1.2. Geothermal systems for the production of thermal energy (heating and/or cooling): private companies and self-employed persons. self-employed persons 1.4. Production of electrical energy by means of mini-hydro turbines or wind turbines: private enterprises, self-employed persons, private individuals, self-employed persons and self-employed persons. private enterprises, self-employed persons, private individuals, non-profit organisations. 1.5. Installations for the use of biogas energy: private companies and self-employed workers. Section 2. Promotion of energy saving and efficiency. 2.2. Measures in the building sector: private companies, self-employed workers, non-profit organisations and homeowners' associations. 2.2. Measures in the building sector: private companies, self-employed workers, non-profit organisations and homeowners' associations. 2.3. Public aid programme for industry: private companies whose activity is included in one of the classes belonging to section 2.2.2. 2.3. Public aid programme for industries: private companies whose activity is included in one of the classes belonging to section C: Manufacturing Industry, of the National Classification of Economic Activities (CNAE). 2.8. Installation of refuelling stations for alternative fuels that are accessible to the public: private companies that are legally private companies legally accredited and registered to carry out the activity of supplying fuels in accordance with the applicable regulations.