This paper explores the importance and practical aspects of the application of smart systems in heating, with a special emphasis on the Tado smart thermostat. Digital transformation within the framework of the green economy contributes to the development of sustainable and energy-efficient solutions that reduce energy consumption, costs and emissions. The analysis of specific data on household energy consumption during the winter months has shown that the application of smart systems can bring savings of up to 31%, while at the same time increasing user comfort. The integration of smart technologies into heating systems is an important step towards digitalization, reducing the ecological footprint and developing new lifestyle habits aimed at more rational use of energy.