Traditional HVAC systems show high energy consumption for cooling buildings. With the rising global outdoor temperatures, developing efficient air-cooling systems that can meet the growing demand for cooling in buildings is essential. In this context, evaporative cooling technology offers a sustainable alternative to traditional air-cooling systems. Thus, it is crucial to identify which air-cooling technology is best suited for each climate zone based on outdoor conditions. The main objective of this work was to evaluate the feasibility and energy performance of using a dew-point indirect evaporative cooler, DIEC, under different Spanish weather conditions. Using an empirical DIEC model and TRNSYS17 software, annual energy simulations were conducted for four different climate zones. Key performance metrics, including the dew-point efficiency, εdp, and Seasonal Energy Efficiency Ratio, SEER, showed higher values, up to 7.96 and 0.83 respectively, for the cities with dry weather conditions