Model Compatibility: Designed specifically for Hayward H-Series Low Nox heaters, this FDXLICB1930 control board is compatible with models H150FDN/FDP, H200FDN/FDP, H250FDN/FDP, H300FDN/FDP, H350FDN/FDP, and H400FDN/FDP. Ensure your model matches before purchase. Energy Efficiency: Equipped with a Header By-Pass design, this replacement control board reduces pump-run time, saving up to 18% in energy costs. It ensures consistent water flow for rapid heating, making it an efficient upgrade for your pool heater. Easy Installation: This plug & play control board kit for Hayward pool heaters includes everything needed for a straightforward replacement. It meets or exceeds OEM specifications, ensuring a perfect fit and reliable performance without the need for complex setups. Durability and Safety: Made from high-quality materials, the FDXLICB1930 offers excellent moisture resistance and durability against saltwater and chemical corrosion. Its stable performance ensures safe operation of your for Hayward pool heater over time. Color: As shown Material: plastic Package Contents: 1 set of control boards