Home » Hayward HDF400 Universal HC Pool & Spa Heater – 400K BTU Dual-Fuel, Energy-Efficient, Low NOx

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Hayward HDF400 Universal HC Pool & Spa Heater – 400K BTU Dual-Fuel, Energy-Efficient, Low NOx

SKU: HDF400
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$3,899.00
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The Hayward HDF400 Universal HC Pool & Spa Heater delivers powerful, energy-efficient heating with a 400,000 BTU output, making it ideal for large residential pools and spas. Featuring a dual-fuel design, this heater provides flexible installation options while maintaining reliable and consistent water temperatures.

Engineered with low NOx technology, the HDF400 meets strict emissions standards without sacrificing performance. Its compact, universal design allows for easy replacement of existing heaters, while the cupro-nickel heat exchanger ensures superior durability and corrosion resistance—even in demanding pool environments.

Hayward HDF400 Universal HC Pool & Spa Heater Compatibility

  • Designed for in-ground residential pools and spas

  • Compatible with natural gas or propane configurations

  • Works with standard pool plumbing and electrical systems

  • Integrates with Hayward automation and control systems
  • Model: HDF400
  • Heating Capacity: 400,000 BTU
  • Fuel Type: Natural Gas or Propane
  • Heat Exchanger: Cupro-Nickel
  • Emissions: Low NOx compliant
  • Application: Residential pool and spa systems
  • Hayward limited manufacturer warranty
  • ANSI certified
  • Meets Low NOx emissions standards

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