Assess of the following heat generation options: Heat pump utilizing the heat from the existing Waste Water Treatment Facility; Biogas or other process heat form the existing landfill; Solar thermal, with or without seasonal storage; Combined Heat and Power (CHP) cogeneration based on natural gas; District cooling; Waste heat from nearby industrial processes; Any other perspective heat source: (a) Implementation of a complete new district heating network (b) Installation of individual building substations.