Hayward - W3H400FDN Universal H-Series, Low NOx, 400K BTU, Natural Gas, Pool & Spa Heater

Hayward W3H400FDN Universal H-Series, Low NOx, 400,000 BTU, Natural Gas, Pool and Spa Heater delivering durability, reliability, and energy efficiency.

• "Totally Managed" Flow saving energy by reducing pump run time
• Silicon Nitride Ignition System
• Cupro-Nickel Heat Exchanger ensures compatibility with almost all pool systems including salt pools
• Low NOx certification
• 83-84% industry-leading thermal efficiency
• Patented header by-pass design
• Corrosion resistance
• Digital LED display
• High and low voltage options (110V or 220V)
• 3/4" Gas Connection at heater
• Choice of left-side or right-side electric, gas and water connections (delivered right-side by default)
• 2" or 2-1/2" plumbing connections
• Important: Instructions for Accepting Your Freight Shipment