The study analyzes the effects of the energy crisis on energy saving behavior among young people in Romania. To do this, we examined direct and mediated influences of knowledge on energy saving on energy saving behavior through attitudes about energy savings on the environment, responsible behavior, and ethics on energy savings. Data were collected using online and in person questionnaires. Hypotheses were tested using Smart PLS-4. The results identified significant and positive relationships between knowledge, attitudes, and behaviors. Therefore, knowledge of energy savings had a significant and positive impact on energy-saving behavior during the energy crisis. In addition, the impact of energy savings on the environment and responsible behavior were established as significant mediators in the knowledge-behavior relationship with respect to energy saving. These results are useful in opening debates about shaping the policy directions of other member states of the European Union. Moreover, our study provides theoretical insights into the knowledge-attitudes-behavior triad, managerial recommendations for organizations, and policy implications for governments. By considering the mediating effects of the impact of energy savings on the environment and attitude towards responsible behavior, our findings improve the understanding of energy-saving behavior among young people during an energy crisis. The practical implications highlight the importance of knowledge dissemination, positive attitudes, and policy support in promoting energy saving behaviors and achieving both economic and environmental goals.