Hayward OmniX Universal H-Series Natural Gas 400,000 BTU Low NOx W3HS400FDN

Universal H-Series pool and spa gas heaters are engineered for easy drop-in replacement, with direct compatibility to Hayward plumbing adapters. At the center is Hayward’s Universal Display, delivering a consistent, intuitive control experience acrossOmni®, OmniX®, and competitive automation systems. With OmniX embedded intelligence, the heater provides enhanced programmability, advanced diagnostics, and seamless remote connectivity.Features and Benefits- Cupro-nickel heat exchanger offers exceptional protection against corrosion and premature failure caused by unbalanced water chemistry- Totally managed water flow boasts industry-leading hydraulic performance coupled with lightning-fast speed-to-heat capability- Universal junction box allows either left and right electrical installation- Front-panel-only access provides easy service and maintenance, avoiding the problems and costs associated with front-and-back-panel access heaters- Low NOx emissions meet clean air quality standards- Backwards Compatible OmniX Retrofit Kits available for existing Universal H-Series gas heaters 2016 or newer with current bezel cutout