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(OPEN BOX) Hayward Universal 400,000 BTU H Series Low NOx Natural Gas Swimming Pool Heater

You save 21%
Availability: In Stock


Brand new heater - never used! Take advantage of our open box deals.

The Universal H-Series is an energy efficient, high performance, installation adaptable commitment to the pool service professional.

Combining advanced technology with universal-fit flexibility, the Hayward Universal H-Series heater is a smart choice for virtually any new installation or existing system upgrade. Delivering state-of-the-industry performance, outstanding energy efficiency, extremely low NOx emission levels and legendary durability and reliability. A choice of left-side or right-side electric, gas and water connections gives the Universal H-Series heaters unprecedented installation flexibility. This enhanced adaptability – coupled with lightweight design, modern low-profile appearance and only front-panel access required for installation and service – ensures compatibility with virtually all new or existing systems and equipment pad conditions


  • Standard cupro nickel heat exchanger

  • Can be used at an altitude of up to 10,100 Ft. (with proper modifications)

  • Excellent salt water and chemical corrosion resistance

  • Exclusive 'Totally Managed' cupro nickel heat exchanger water flow

  • Same water velocity through all tubes for faster heating

  • Patented header by-pass design

  • Up to 18 percent savings by reducing pump run-time

  • 2in x 2 1/2in CPVC union plumbing connections

  • Common union for installation or service adapts to larger plumbing recommended for greater efficiencies

  • Low NOx emissions - meets clean air quality standards



Built with a durable cupro nickel heat exchanger, Universal H-Series heaters offer exceptional protection against corrosion and premature failure caused by unbalanced water chemistry, ensuring you get season after season of premium heating performance


Universal H-Series heaters boast industry-leading hydraulic performance coupled with lightning-fast speed-to-heat capability. In fact, the powerful 500,000 BTU model is the fastest in its class, giving you less time to wait and more time in the water


Designed with “totally managed” water flow, Universal H-Series heaters save energy (and money) by reducing pump run time. Their low NOx emissions meet air quality standards in all low-NOx areas, so you can rest easy knowing their environmental impact is low

(OPEN BOX) Hayward Universal 400,000 BTU H Series Low NOx Natural Gas Swimming Pool Heater Reviews

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