Hayward H-Series 350K BTU Natural Gas Pool Heater H350FDN

The Hayward H-Series H350FDN Low NOx 350,000 BTU Natural Gas Pool and Spa Heater is environmentally friendly and energy efficient. With an industry leading 84 percent thermal efficiency the Hayward H-Series heater complies with all current California and Texas air quality emission standards.

Other great performance and efficiency-enhancing advancements by Hayward include stainless steel burners, corrosion-resistant Finn Plate heat exchangers with Cupro nickel and insulated Fire Tile combustion chambers which trap the heat unlike other forms of insulation and deliver the highest degree of performance from every BTU. The LED control panel monitors heater performance for added convenience and maximum comfort with minimum effort.

The ignition system delivers dependable lighting and reliable operations with just a touch of a button. The forced draft system constantly moves air through the combustion chamber to eliminate all outside weather variables affecting heating performance, such as wind conditions, eliminating the need to install a high-wind stack.

More Information
Delivery Time LTL Freight 2-7 Business Days
Manufacturer Hayward
Technical Specs

BTU: 350,000
Gas: Natural Gas (NG)
Controls: Digital
Heater Width: 33-¼”
Silicon Nitride Hot Surface Electronic Ignition, Dual Thermostat

Service & Installation Manual

Product Documentation
SKU HAY-15-731
Manufacturer Part # H350FDN
Product Features
  • For In-Ground Pools and Spas 
  • Electronic Ignition Dual Thermostat
  • 350K BTU Natural Gas (NG)
  • Heat exchangers are constructed with highly resilient Cupro Nickel
  • Easy-to-read L.E.D. digital Control Panel
  • New polymer header provides superior hydraulic performance
  • Larger diameter plumbing systems with 2" x 2 1/2" CPVC unions
  • 1 Year limited warranty from date of installation
  • Meets the NOx Emission standards
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