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
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
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
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
Orders Under $50
Orders Over $50
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.
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 Cleaners *
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 email@example.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.
Hayward Universal H-Series Low Nox 400,000 BTU Natural Gas Heater
Delivery Date Details
The Estimated Delivery Date is based on FedEx Ground Service Transit Time to the zip code you provided. If you are logged in, we will use you zip code as entered into your profile.
Since we stock our products in multiple warehouses nationwide, you may see various delivery dates for items in your cart.
We may ship items separately to expedite your delivery at no additional cost.
If an item has an Estimated Delivery of "TBD" it is either Backordered or On The Way and will ship upon receipt.
See The Price in the Cart
We offer exceptional pricing
on all of the products that we sell. Sometimes, the deals are too
low to publish and advertise. So, if you click to see the item and
price in your shopping cart you will not be disappointed!
You may always remove or edit the item from the cart.