The European Commission has recently published a working document on State aid for district heating infrastructure, where it provides instructions for assessing the State aid for heat generation facilities and distribution networks. Any such support is subject to the scrutiny of the competent State aid authority prior to granting the aid, which in the case of the Energy Community Contracting Parties is their respective national State aid authority. The guidance provides instructions in which cases State aid may be excluded and in which there is no need to notify for State aid clearance, but other requirements may apply.
Check out the full guidance of the European Commission, as well as examples of different forms of State aid granted to the district heating/heating sector by the EU Member States.