Hayward Universal H-Series 400,000 BTU Natural Gas Pool and Spa Heater Low NOx W3H400FDN

The Hayward Universal H-Series 400,000 BTU natural gas heater is the highest-output model in the standard H-Series, an energy-efficient, high-performance heater for new or existing in-ground pools and spas. Its industry-leading hydraulic design cuts circulation pump run time and can deliver energy savings of up to 18 percent compared to less efficient competitors. A standard cupro-nickel heat exchanger gives excellent resistance to salt water and chemical corrosion, and Hayward Totally Managed water flow keeps the same water velocity through every tube for faster, more even heating. A patented header bypass design and a forced-draft system that moves air through the combustion chamber at a precise rate round out the package, with no high-wind stack required. It is a Low NOx model that meets clean air quality standards.

Features

• Highest-output model in the standard Universal H-Series
• Standard cupro-nickel heat exchanger with excellent salt and chemical corrosion resistance
• Totally Managed water flow keeps equal velocity through all tubes for faster heating
• Industry-leading hydraulics reduce pump run time for energy savings up to 18 percent
• Patented header bypass design
• Forced-draft system moves air at a precise rate, no high-wind stack needed
• 2 inch by 2.5 inch CPVC union connections for flexible installation
• Low NOx emissions that meet clean air quality standards

Specifications

• Part Number: W3H400FDN
• Type: Natural gas pool and spa heater, forced draft
• Heating Capacity: 400,000 BTU/hr
• Fuel: Natural gas
• Emissions: Low NOx, meets SCAQMD Rule 1146.2 standards
• Application: In-ground pools and spas, new or existing
• Heat Exchanger: Cupro-nickel
• Connections: 2 inch by 2.5 inch CPVC unions
• Voltage: 120 / 240V, 60 Hz, single phase
• Circuit: 5.5 amps, 15 amp max breaker
• Water Flow: 30 to 125 GPM
• Clearances: 12 in sides, 6 in rear
• Minimum Operating Temperature: 40 F
• Shipping Dimensions: 30.6 in x 32.8 in x 39.6 in
• Shipping Weight: 214 lb
• Warranty: 1 year parts

Shipping: We ship within the United States only, using USPS, FedEx, and UPS. Enjoy free shipping on all orders.
Orders ship within 1 to 2 business days, and delivery typically takes 4 to 6 business days after shipping, for a total of about 5 to 8 business days from your order date.

Tracking information is emailed once your order ships. We do not currently offer international shipping. See our full Shipping Policy for full details.

Returns: Unused items in their original packaging may be returned within 30 days of delivery. A restocking fee applies to change-of-mind returns, and defective, damaged, or incorrect items are returned free of charge. See our full Refund and Returns Policy for full details.

Warranty Assistance:
If the product is past the 30-day return window, we are still willing to assist with warranty claims. Please contact us for more information, and we will help guide you through the warranty process