The Hayward H-Series W3H250FDN Natural Gas Pool and Spa Heater is environmentally friendly and energy efficient. Boasting an industry leading 84 percent thermal efficiency the environmentally friendly H-Series complies with all current California and Texas air quality emission standards. It is also the only pool heater to offer Cupro Nickel heat exchangers standard on all models. Cupro-Nickel is designed to withstand the harshest pool environments like low pH, high flow and heavy pool use and is also recommended for all pools using salt systems.

• Natural Gas pool heater
• 250,000 BTU
• For In-Ground Pools and Spas
• Electronic Ignition Dual Thermostat
• Stainless steel burners
• Highly resilient Cupro Nickel heat exchanger
• Designed for the toughest environments
• Stands upto salt, low pH, high flow, heavy use
• Easy to read L.E.D. digital Control Panel
• Polymer header for superior hydraulic performance
• Insulated fire tile combustion chamber
• Larger diameter plumbing systems
• 2" x 2.5" CPVC unions
• 84 Percent thermal efficiency
• Meets the NOx Emission standards
• Meets California and Texas air quality emission standards