The Rheem RTG20239P Program Chip is specifically engineered for NG (natural gas) applications, providing enhanced performance for Rheem tankless water heaters. This chip optimizes the heating process, ensuring consistent water temperatures and energy efficiency. Designed for easy integration with multiple Rheem models, it is a reliable choice for both residential and commercial use. The compact size allows for straightforward installation, and it adheres to industry standards for safety and reliability. Improve your water heating system's efficiency with this essential program chip.