Hayward Universal H-Series 400,000 BTU Natural Gas Heater w/ OmniX

Hayward's largest H-Series natural gas heater, rated at 400,000 BTU/hr for larger bodies of water, commercial-scale pools, or situations where fast temperature recovery matters more than running cost. Shares the same cupro-nickel heat exchanger and Low NOx compliance as the smaller H-Series models, with dual-voltage 120/240V flexibility for the control circuit and a physically larger cabinet to match the higher BTU rating.

• 400,000 BTU/hr (117kW) output on natural gas — the highest-capacity gas heater in this lineup
• Cupro-nickel heat exchanger for corrosion resistance in demanding water chemistry
• 120/240V, 1-phase, 60Hz control circuit — 5.5A, 15A breaker, dual-voltage flexibility
• Low NOx compliant emissions for regional air-quality rules
• OmniX diagnostics on a Universal Display for streamlined troubleshooting and service
• 3-year parts / 1-year labor warranty — a full extra year of parts coverage over the 135K BTU model