Hayward Universal H-Series 400K BTU Natural Gas Pool Heater (H400FDAU) Low NOx

Hayward Universal H-Series 400,000 BTU Natural Gas Pool Heater

The Hayward Universal H-Series is a high-performance, energy-efficient gas pool heater engineered for the pool service professional. Featuring a standard cupro nickel heat exchanger and patented flow management technology, it delivers faster, more consistent heating while resisting salt water and chemical corrosion — ideal for large pools and spas demanding rapid heat recovery.

Key Features

• Standard cupro nickel heat exchanger for superior corrosion resistance
• Exclusive "Totally Managed" water flow — same velocity through all tubes for faster heating
• Patented header by-pass design for optimised efficiency
• Up to 18% pump run-time savings for reduced operating costs
• Low NOx emissions — meets clean air quality standards
• 2in x 2½in CPVC union plumbing connections
• Common union design for easy installation and service
• Adapts to larger plumbing for greater efficiency
• Excellent salt water and chemical corrosion resistance

Specifications

• BTU Output: 400,000 BTU/hr
• Fuel Type: Natural Gas
• Model: H400FDAU
• Emissions: Low NOx
• Weight: 75 kg

Documentation

• Universal H-Series Owner's Manual (1301640701RevG)
• Universal H-Series Service & Installation Manual (1301623301RevK)

Note: This is an Expert Line product. Available through your local pool professional or in-store only.