Hayward H500FDN Universal H-Series 500,000 BTU Pool and Spa Heater, Natural Gas, Low Nox

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* Easy dual-voltage conversion with fuse-protected circuit boards
* Standard Cupro nickel heat exchanger for superior value and reliability
* Patented polymer header and bypass valve design for the ultimate in hydraulic efficiency and reliability
* Hayward Universal design for easy and versatile professional installation
* Environmentally responsible low NOx emissions to meet or exceed air quality emission standards in all Low NOx regions
* 500,000 BTU input for the fastest speed-to-heat performance

Hayward's Universal H-Series 500,000 BTU gas heaters combine advanced technology with universal fit flexibility, making them the perfect heater for any new or replacement installation. This truly innovative design offers independent left-side or right-side electric, gas and water connections, with 110 or 220 volt electric capability. This enhanced adaptability, coupled with a lightweight design, modern low-profile appearance and front panel only access required for both installation and service, ensures compatibility with virtually all new or existing systems and equipment pad configurations. Built to last, ONLY Hayward constructs every heater with a standard Cupro Nickel heat exchanger for superior durability over copper heat exchangers. Additional value and reliability contributors are the silicon nitride hot surface ignition system, stainless steel burners, insulated combustion chamber and 2" x 2 1/2 inch CPVC unionized plumbing connections. The Universal H-Series heater features industry leading hydraulic performance that saves energy via reduced pump circulation run time, an intuitive, easy to read digital LED control panel and is environmentally responsible with low NOx emissions that meet and exceed all air quality emission standards. For residential use only, backed by a 1 year warranty.