The conventional desert cooler is highly efficient in dry weather conditions, as it relies on the evaporation of water to cool the air, which works best in low-humidity environments. On the other hand, the regenerative evaporative cooler (REC) is designed to perform better in humid conditions, where traditional coolers are less effective. The regenerative coolers are capable of cooling the air without increasing its humidity, bringing the temperature down close to the dew point. Exergy and economic analyses of the regenerative cooler were conducted to evaluate its suitability across various global climatic conditions. The study analyzed various factors of the regenerative evaporative cooling device, including its dew point effectiveness, coefficient of performance, exergy destruction, exergy efficiency, operating costs, and specific total cost (STC). The performance of the dual-mode evaporative cooler was evaluated on both an annual and monthly basis across four cities situated in different international climate zones. The study shows that the regenerative evaporative cooler offers significant energy and cost savings.