Universal H-Series ASME Natural Gas 400,000 BTU Low NOx

Hayward Commercial Pool's Universal H-Series ASME gas heaters are designed and certified for commercial use. The flagship of our H-Series line encompasses high-end features and construction materials as standard. They combine industry-leading hydraulics, exceptional performance, energy efficiency, and reliability with planet-friendly low-NOx emissions. Flexible connection options make them ideal for new or existing applications. Choose from 250,000, and 400,000, and 500,000 BTU natural gas or propane models.

Features and Benefits

• Patented Cupro Nickle Finn Plate™ heat exchanger with bronze header as standard


• Independent left or right side electric, water, and gas connections


• 2in x 2 1/2in CPVC flanged connections


• ASME pressure relief valve included as standard


• Electronic lock-out feature prevents unauthorized access to configuration settings


• Easy installation and service via access of single front panel


• Easy gas valve adjustment


• Easy dual voltage conversion with fuse-protected circuit boards


• Texas Heater Kits Available


• 500,000 BTU provides unprecedented speed to heat, with 2 models delivering 1 million BTUs while using minimal pump room space