Hayward Universal H-Series Low NOx Swimming Pool Heater, Natural Gas, 300,000 BTU - H300FDN

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

Gas heaters boast the ability to produce heat quickly which makes it a popular choice amongst pool owners. Gas heater units are designed for both above ground pools and in-ground pools. They also come in Electronic or Millivolt (Standing Pilot) versions.

Electronic versions are like a modern gas boiler and feature electronic spark ignition and micro processor control, thus giving you complete control of your pool temperature at the push of a button. Millivolt models are a traditional technology which uses a permanent pilot light and therefore is slightly less efficient, however does not require electrical service.

So whether it is an in-ground pool heater you require or an above ground pool heater, we are ready and stocked waiting for you!

• 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
• Up to 18% savings by reducing pump run-time
• 2″ x 2 1/2″ 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
• Weight: 188.0 lbs.

State-of-the-Art Finn Plate Heat Exchanger with Cupro Nickel
Our patented single header "V" baffle design heat exchangers allow for long life, fast heating and virtually no condensation. All Hayward heat exchangers are now constructed with highly resilient Cupro Nickel for greater durability and longevity even in salt-based, high flow or aggressive water chemistry environments.

Venting -- Based on heater location and venting requirements, the venting configuration will vary. 

Useful Parts

Hayward Commercial’s Universal H-Series ASME gas heaters now have a 1-year warranty when purchased online.

Warranty is extended to 3 years when purchased in store. 

OWNERS MANUAL

SERVICE AND INSTALLATION MANUAL

PARTS LIST