Modern heating technology increasingly relies on renewable energy sources such as solar thermal systems, heat pumps, and groundwater utilization. Innovative solutions, including waste heat recovery, combined heat and power (CHP), and district heating, enhance energy efficiency. Additionally, technologies like steam generation, thermal activation of building components, hybrid heating/cooling ceilings, and energy floors enable flexible indoor climate control. These advancements contribute to a sustainable energy supply and reduce CO₂ emissions in buildings.