The Rheem RTG20239AW Program Chip for LP (liquid propane) systems is designed to optimize the performance of Rheem tankless water heaters. This chip enhances temperature control and energy efficiency, ensuring compliance with industry standards. It is easy to install and compatible with various Rheem models, making it a versatile upgrade for your water heating system. The program chip is engineered to improve the overall functionality of your Rheem water heater, making it suitable for both residential and commercial applications. Enhance your system's performance with this essential program chip.