This Panasonic X-Premium Inverter air conditioner utilizes R32 refrigerant and boasts a 5-star energy rating for efficient cooling. Available in multiple BTU sizes (CS-XU10/13/18BKH models), it features inverter technology for precise temperature control and energy savings. The R32 refrigerant contributes to a lower environmental impact compared to traditional refrigerants. It offers superior cooling performance and energy efficiency with the X-Premium line's advanced features.