The Hayward IDXL2ICB1931 Integrated Control Board is a replacement part for Hayward H-Series Low NOx heater models H250IDL2, H350IDL2, H400IDL2. This board is designed to integrate multiple heater functions such as ignition control, temperature regulation, and diagnostic monitoring into a single unit for easy operation. It is a high-quality replacement part that ensures efficient and reliable heating for your pool or spa.