The Hayward Universal H-Series 400,000 BTU Low NOx Propane Heater (W3H400FDP) is designed for optimal performance, providing powerful heating for pools of all sizes. It is compatible with any sanitizing system, including saltwater, making it a versatile option for a wide range of pool types. The easy-to-read L.E.D. control panel displays accurate temperature readings and diagnostics, ensuring simple operation. Its industry-leading hydraulic performance helps save energy by reducing circulation pump run time, while the “Totally Managed” cupro-nickel heat exchanger offers superior corrosion and erosion resistance, ideal for saltwater systems. The electronic control system maintains water temperature and features self-diagnostic capabilities for reliable performance. With its forced draft system and adaptable voltage options, this heater ensures consistent airflow and easy installation. Environmentally responsible and compliant with all air quality standards, the W3H400FDP is backed by a 3-year limited manufacturers warranty.