The Hayward Universal H-Series 250,000 BTU Low NOx Natural Gas Heater (W3H250FDN) offers powerful and efficient heating for pools of all sizes, making it compatible with any sanitizing system, including saltwater. It features an easy-to-read L.E.D. control panel with digital temperature readout and diagnostics for precise operation. With industry-leading hydraulic performance, this heater saves energy by reducing circulation pump run time, while the “Totally Managed” cupro-nickel heat exchanger ensures superior corrosion and erosion resistance, ideal for saltwater systems. The electronic control/display maintains optimal water temperature and monitors heater performance with self-diagnostic capabilities. Its forced draft system guarantees precise air flow through the combustion chamber, ensuring consistent heating. Environmentally friendly, this heater complies with all air quality standards, and its installation is made simple with adaptable voltage. The W3H250FDN is backed by a 3-year limited manufacturers warranty, offering long-term reliability.