Universal H-Series Heater 400,000 BTU - Natural Gas, Low NOx (Open Line) W3H400FDN

Hayward Universal H-Series gas heaters are the “universal” energy efficient remedy for any new or existing pool or spa. An industry-leading hydraulic design reduces circulation pump run time to provide energy savings of up to 18% when compared to less efficient competitors. The energy efficiency of the Universal H-Series gas heater combines with environmentally friendly low NOx emissions, a standard cupro nickel heat exchanger, and ultimate installation flexibility to responsibly heat a pool or spa today and for years to come.

Features and Benefits

• Standard cupro nickel heat exchanger
• 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
• Reduction in pump run-time results in significant cost savings
• 2″ x 2 1/2″ CPVC union plumbing connections
• Forced draft system constantly moves air through the combustion chamber at a precise flow rate, eliminating the need for a high-wind stack
• Low NOx emissions – meets clean air quality standards

NOTE: Hayward Universal H-Series heaters meet or exceed the South Coast Air Quality Management District (SCAQMD Rule 1146.2) Low NOx emissions standards in all Low NOx areas that apply the SCAQMD standard.