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Product Specifications

Manufacturer: Hayward Pool Products
Hayward Pool Products Item Number: H400FDN
UPC/GTIN: 610377027250
Condition: New
Warranty: 1 Year

Need Replacement Parts?

See the Complete Hayward Pool Products Replacement Parts List and Schematic Diagram for the:

Hayward Universal H-Series Low Nox 400,000 BTU Natural Gas Heater

Product Information

Hayward H-Series Low NOx Pool Heater
Keeping your pool properly heated can increase its value and lengthen your swimming season. If you're searching for superior comfort and control, you can find it in Hayward's collection of top-notch, highly efficient pool heaters for in-ground pools. Install a world-class in-ground pool heater for the ultimate in luxury.

The Universal H-Series Low NOx heater has an industry-leading thermal efficiency and complies with all current California air quality emission standards. The low NOx emission makes it a perfect choice for the environmentally concerned pool owner.

Its hydraulic performance also saves energy by reducing the circulation time of the pump and it can raise the temperature of an 800 gallon pool 30 degrees in less than an hour.

Other advances include stainless steel burners, corrosion-resistant heat exchangers and insulated Fire Tile combustion chambers. This traps the heat unlike other forms of insulation delivering the highest degree of performance from every BTU. Equipped with an LED control panel, it 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.

Exclusive H-Series Heater Benefits:

  • Standard Cupro-Nickel Heat Exchanger - Totally Managed Flow provides exceptional corrosion resistance and erosion protection - ideal for today’s salt-based electronic chlorination systems
  • Superior Hydraulic Performance - Industry-leading hydraulic performance saves energy by reducing circulation pump run time
  • State-of-the-art Finn Plate Heat Exchanger - State-of-the-industry Finn Plate heat exchanger with special V-groove design for faster heating and longer life
  • Dual Voltage - Installation is simplified with voltage that adapts to either 110V or 220V
  • Universal Wiring Junction Boxes - High and low voltage connections are easy and convenient with left and right side junction boxes
  • Hot-Surface Silicon Nitride Ignition System - Exclusive silicon nitride ignition system for dependable lighting and reliable operation
  • Digital LED Control Panel - Electronic control display maintains water temperature; monitors heater performance with self-diagnostic capability
  • Insulated FireTile Combustion Chamber - Unlike older forms of insulation, FireTile securely traps the heat, delivering the most performancefrom each BTU
  • Low NOx Emissions - Environmentally  responsible; complies with all current California and Texas air quality emission standards
  • 1 Year Limited Manufacturer's Warranty

Hayward Pool Products Product Videos

Hayward Pool Products Item H400FDN Documentation and Manuals

Hayward Pool Products Item H400FDN Suggested Applications

  • All Concrete, Colored Plaster and Painted Pools
  • All Inground Vinyl Liner Swimming Pools
  • All Aboveground Swimming Pools

Shipping Rates

Orders Under $50 $5.00
Orders Over $50 FREE
3-Day Premium add $50.00
2-Day Premium add $65.00

Shipping Policies:

  • We only ship orders to the 48 contiguous United States.
  • Chemicals, pool paint, and some oversized items, will only ship via ground service.
  • Items shipped via Freight Service, such as pool heaters, will only ship via ground service.
  • All orders shipping to Maryland will incur a 6% sales tax charge.
  • Some items, including hazmat, may require a Direct Signature upon delivery.
  • Shipments must be inspected by customer prior to signing delivery receipt.
  • Orders containing small and light-weight items may ship via FedEx SmartPost or USPS.

Order Returns

You may return an item sold to you by Hydropool.com up to 30 days after purchase. The product must be in good condition, unused, in original packaging, and must have all parts, accessories and paperwork; returns without these requirements and/or guidelines will not be accepted.

If a delivery attempt is unsuccessful on order requiring a direct signature, a 15% restock fee may be applied should the order be returned to Hydropool.com by the carrier.

Any claims to missing parts, items or damaged goods for any orders must be made within 15 days of delivery date. We are not able to credit your shipping and handling fees if the wrong product was ordered due to customer error. However, if you received the wrong products due to an error on our behalf, we will pay for the return services fees and you will receive a full refund or exchange.

To return an item to Hydropool.com, please call 800-4MY-POOL to get a Return Merchandise Authorization number (RMA) and return instructions. Any items returned without an RMA number will be refused. We will process your refund upon receipt of the returned product.

Products that cannot be returned:

  • Pool Chemicals
  • Pool Cleaners *
  • Special Orders
  • Pool Liners
  • Pool Paint
  • Deck Coatings & Paint
  • Pool Heaters *
  • Pool Pumps *
  • Pool Filters *
  • Pool Ladders *
  • Pool Chlorinators *
  • Custom Manufactured Safety Covers
  • Stock Covers that are Ordered and for the Incorrect Pool Size

* These products must not have been used, installed, or attempted to have been installed. All products must include original paperwork, parts & accessories, and everything accompanied with the product.

Concealed damage on any ground shipment must be reported within 3 business days. Freight shipments must be inspected for damages prior to customer signing delivery receipt. Please email any information regarding concealed damage to info@hydropool.com. Please reference your order number in all order related email correspondence.

Customer is responsible for any/all return shipping charges. Some returns may be subject to a 15% restock fee that will be deducted from your refund.

Please call 800-4MY-POOL if you have questions regarding this return policy.

Thank you for shopping Hydropool.com!

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