The Rheem RTG20239AU Program Chip is specifically designed for liquid propane (LP) applications in Rheem tankless water heaters. This chip optimizes performance and efficiency, ensuring your system operates at peak levels. It is engineered to meet stringent industry standards, providing reliable operation and compatibility with various Rheem models. The installation process is straightforward, allowing for quick upgrades or replacements. Enhance your water heating system's functionality with this essential component, designed to improve energy efficiency and reduce operational costs.