The Rheem RTG20239H Program Chip is designed for LP (liquid propane) applications, ensuring optimal performance in Rheem tankless water heaters. This chip enhances the efficiency and functionality of your system, allowing for precise temperature control and reliable operation. It is compatible with various Rheem models, making it a versatile choice for homeowners and professionals alike. The compact design ensures easy installation, and it meets industry standards for safety and performance. Upgrade your water heating system with this essential component.