Heat recovery with waste heat involves identifying heat sources and using suitable methods to capture and utilize the waste heat generated. This can be done in various applications, such as power plants, industrial production facilities, heating and cooling systems and building technology. There are various technologies for heat recovery, including heat exchangers, heat pumps and exhaust gas recirculation systems. These systems make it possible to capture the thermal energy contained in the waste heat and use it for heating purposes, preheating process air or generating hot water. One example of heat recovery is the use of waste heat from industrial processes to heat buildings in the room or to preheat air in heating and ventilation systems. By using heat recovery systems, the energy required for heating purposes can be reduced, leading to a significant reduction in energy costs. Another example is heat recovery in power plants. Here, the waste heat from the electricity generation process is used to generate steam to drive turbines. This increases the efficiency of the power plant and generates more electrical energy from the same amount of fuel.