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Hayward Universal H-Series Low NOx 400K BTU Heater (Natural Gas) || H400FDN

Hayward  |  SKU: H400FDN

In-store pickup or delivery only

Call (602) 693-0316

Natural Gas

400K BTU

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Call (602) 274-7946

Description

Hayward Universal H-Series Low NOx 400K BTU Heater (Natural Gas) || H400FDN

The Hayward Universal H-Series Low NOx 400K BTU Natural Gas Heater (Model H400FDN) is the ultimate choice for fast, efficient, eco-friendly pool and spa heating. This high-performance heater is built with advanced low-NOx technology, which complies with the strictest air quality standards. Designed for versatility, the H-Series is ideal for residential and commercial pool systems. Sold exclusively by ePoolSupply.com, an authorized and preferred Hayward reseller, this heater guarantees quality, efficiency, and long-lasting reliability, giving you confidence and security in your purchase.

Product Highlights

  • 400,000 BTU Output: Delivers rapid heating for large pools and spas, extending your swimming season.
  • Low NOx Emissions: Eco-friendly design complies with air quality regulations, including California’s stringent standards.
  • Universal Design: Works with new or existing plumbing setups for hassle-free installation.
  • Energy Efficient: Equipped with a hydraulic design that increases efficiency and reduces circulation pump runtime.
  • Cupro-Nickel Heat Exchanger: Provides superior corrosion resistance, making it ideal for saltwater or chemically aggressive pools.
  • Compact Footprint: Designed to fit in tight equipment areas without compromising performance.
  • Digital LED Control Panel: Intuitive interface for easy temperature adjustments and diagnostics.

Specifications

  • Model: Hayward Universal H-Series H400FDN
  • Type: Low NOx Natural Gas Pool and Spa Heater
  • BTU Rating: 400,000 BTU/hr
  • Heat Exchanger Material: Cupro-Nickel
  • Voltage: 120/240V dual voltage (field-configurable)
  • Amperage: 3A (120V); 1.5A (240V)
  • Dimensions: 36" L x 29.5" W x 24" H
  • Weight: 214 lbs
  • SKU: H400FDN
  • UPC: 0610377027250

Brief History

Hayward’s Universal H-Series heaters have set the standard for pool heating, focusing on energy efficiency, durability, and environmental responsibility. The H400FDN model, one of the most popular in the series, is known for its high BTU rating and low NOx emissions. Introduced to meet increasing demand for eco-conscious products, this heater is a trusted choice for pool professionals and homeowners, promising years of reliable service.

Electrical Information

The H400FDN operates on a dual-voltage system (120/240V), allowing for flexible installation options. Proper grounding is required, and a dedicated circuit breaker is recommended to ensure safe and reliable operation. Always adhere to local electrical codes and manufacturer guidelines.

Recommended Installation Tips

  1. Choose a Well-Ventilated Location: Install the heater outdoors in a well-ventilated area to ensure proper combustion and airflow.
  2. Plumbing Compatibility: Utilize the universal plumbing design to integrate existing systems easily. Ensure connections are leak-free.
  3. Voltage Configuration: Use the wiring diagram to set the voltage to match your electrical system. Consult a licensed electrician for proper setup.
  4. Gas Line Requirements: Verify that the natural gas supply line is adequately sized to deliver consistent fuel flow.
  5. Regular Maintenance: Clean the heat exchanger and inspect the burners periodically to maintain peak performance and extend heater life.

Why Buy from ePoolSupply.com?

ePoolSupply.com is your trusted source for Hayward products. As an authorized and preferred Hayward reseller, we guarantee genuine products, expert advice, and fast shipping. Our commitment to quality and customer satisfaction ensures you get the best heater for your pool or spa.

Extend your pool season with the Hayward Universal H-Series Low NOx 400K BTU Natural Gas Heater. Shop now at ePoolSupply.com for reliable, energy-efficient heating!

Reviews

Product Warranty

Warranty Information

ePoolSupply Warranty: Here at ePoolSupply, we strive to get our customers the right product, the first time. Even though we aim for this, mistakes do happen. Therefore, we allow the following options:

- All products are eligible for returns, or exchanges, up to 30 days from delivery.
- All products are subject to manufacture warranty from day 1 up to when the warranty ends.

 

Reliable protection for the products you love.

ePoolSupply.com has teamed up with Extend to offer our customers peace of mind for purchasing items from our website! Most products displayed on our website will now offer an Extend plan to ensure that the items you purchase from our manufacturers will be covered no matter what! Check out some of the information below on how simple and easy the Extend process can be!

Enjoy added peace of mind with an Extend protection plan. From a simple, stress-free claims process to quick repairs or replacements, we're here for you when the unexpected happens.


Adding Extend is easy.

When shopping for your favorite brands, look for Extend at checkout to add a protection plan.

1. Add Extend while you shop. Simply add a protection plan at checkout when shopping for millions of eligible products.

2. File a claim in minutes. If you have an issue with your product, easily file a claim in just a few clicks.

3. Enjoy your product!

When your claim is approved, get a quick repair or replacement.

Please contact us with any questions or concerns as we are happy to help!


Pentair Warranty:

Registration Link HERE.

Contact Link HERE.

While many Pentair products are covered by a sixty- (60) day warranty, a select number of products qualify for extended warranty coverage. You can view the whole policy here.

Select Bundled Products: applies to purchases and qualified installation of a minimum of a pump and filter, and one or more of the following: heaters, heat pumps, control systems, automatic cleaners, lighting, salt chlorine generators, or UV sterilizer**

*Note: Qualified Installer - Defined as a licensed professional who charges a fee for his services, and possesses a business license, contractor's license, and/or resale permit. Common examples of a "qualified installer" include Swimming Pool, Home Repair or Landscape Professional; Plumber or Electrician; General Contractor; Heating and Air Conditioning Specialist.

**Note: Bundled products - must be purchased on the same invoice and installed at the same time. If any product within a bundle is ineligible for the bundled warranty coverage, then all products within the same bundle will be disqualified from receiving the three (3) year extended warranty coverage for bundled products.

Trade Grade products must be purchased from a retail store (brick & mortar), pool builder, or pool service company to receive a one-year, two-year, or three-year warranty. If purchased online will only receive a sixty-day limited warranty. View the list of Trade Grade Products.

^Labor Costs are not covered outside of US/Canada

Exceptions that may result in denial of a warranty claim:

  1. Damage caused by careless handling, improper repackaging, or shipping.
  2. Damage due to misapplication, misuse, abuse, or failure to operate equipment as specified in the owner's manual.
  3. Damage caused by failure to install products as specified in the owner's manual.
  4. Damage due to unauthorized product modifications or failure to use Pentair's original replacement parts.
  5. Damage caused by negligence, or failure to maintain products as specified in the owner's manual properly. 
  6. Damage caused by failure to maintain water chemistry in conformity with the standards of the swimming pool industry for any length of time.
  7. Damage caused by water freezing inside the product.
  8. Accidental damage, fire, acts of God, or other circumstances outside the control of Pentair.
  9. Please see the warranty card for commercial exceptions.

Pump Warranties:

Models Sold: 342001/011028: Backed by a 2-Year Manufacturer's Warranty**

**When installed by an industry professional and the product has been registered through Pentair.

**If the item is "Self-Installed, Pentair will honor a 60-day warranty for PARTS ONLY/NO LABOR from the point of purchase.

 

Fluidra Warranty (Zodiac/Polaris/Caretaker/Jandy):

Contact Fluidra Here

Each Brand operated under the Fluidra umbrella has its own limited warranty. Please see each link below to find your specific warranty for each company.

Zodiac Limited Warranty

Jandy Limited Warranty

Polaris Limited Warranty

Caretaker Limited Warranty

 

A&A (Pentair In-Floor) Warranty:

Contact A&A(Pentair In-Floor) Here. 

Warranty parts

Follow these steps to replace parts under warranty:

  1. Package and ship the parts, making sure you include the following

 information:

  • Warranty certificate number
  • Your complete name, address, and phone number(s)
  1. Prepay the freight and ship the parts to

A&A (Pentair In-Floor) Warranty Department

1502 E Buckeye Rd

Phoenix, Arizona 85034

Note: If you do not have your warranty number, you must first contact A&A (Pentair In-Floor) 

Customer Satisfaction at one of the following phone numbers for directions on

how to replace the parts.

(800) 831-7133

Out-of-warranty parts: You do not need to return out-of-warranty parts. You may order replacement parts by calling A&A (Pentair In-Floor) Customer Satisfaction on the toll-free line (800) 831-7133 or by visiting the website: pentair.com/infloor

 

Paramount Warranty:

Contact Paramount HERE. 

Please click on the link below to file for any warranty issues with Paramount:

PARAMOUNT WARRANTY INFORMATION

 

BlueSquare Warranty:

Contact BlueSquare Here. 

Please click on the link below to file for any warranty issues with BlueSquare:

BlueSquare MFG Warranty Information

 

Hayward Warranty:

Contact Link Here. 

Please click on the link below to file for any warranty issues with Hayward:

Hayward Warranty Information

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