Hayward Universal H-Series Natural Gas Heater 400,000 BTUs, Low NOx | W3H400FDN

Name: Hayward Universal H-Series Natural Gas Heater 400,000 BTUs, Low NOx | W3H400FDN
Brand: Hayward
SKU: HPPW3H400FDN
Price: 4499.0 USD
Availability: InStock

The Hayward Universal H-Series W3H400FDN Low NOx Pool Heater delivers powerful performance with an impressive 400,000 BTUs, making it the perfect choice for large residential or commercial pools and spas. Engineered for energy efficiency and dependable operation, this natural gas heater is designed to meet the rigorous demands of pool professionals and pool owners who value robust heating capacity and durability.

Equipped with a premium cupro nickel heat exchanger, the W3H400FDN provides exceptional resistance to corrosion from salt water and chemically treated pools, ensuring longer life and reliable heating performance. Its universal design makes it highly adaptable for new installations or as a replacement, with flexible plumbing and electrical connections to suit diverse system requirements.

Compliant with low NOx emission standards, the W3H400FDN is an environmentally responsible solution that contributes to improved air quality. Hayward’s dedication to innovative engineering ensures this heater delivers fast, efficient, and consistent heating to keep your pool water at the perfect temperature throughout the swimming season.

Model: W3H400FDN
Fuel Type: Natural Gas
Heating Capacity: 400,000 BTUs
Heat Exchanger: Cupro Nickel for superior corrosion resistance
Energy-efficient design helps reduce operational costs
Electrical Requirements: 120V / 240V
Amperage: 5.5 amps
Minimum Flow Rate: 20 gallons per minute
Plumbing Connections: 2" x 2-1/2" CPVC union fittings
Patented header by-pass design for optimized hydraulic performance
Low NOx emissions compliant with clean air quality standards
Application: Suitable for large residential and commercial pools and spas

SKU: W3H400FDN

Hours Of Operation:

Monday - Friday: 8:00 am to 4:00 pm Phoenix Time

Saturday and Sunday: Closed

Orders costing more than $300 WILL be required to have signature confirmation upon delivery.
Handling time is typically only 1 day.
Any item ordered after 1pm Phoenix time, may not ship same-day.
Call us if you require expedited shipping and we can give you quotes based on your needs.

Return Policy:

All products, except as noted below, are eligible for return up to 30 days after receipt of item.
For returns, an RMA form must be filled out HERE or customers can call for additional help.
Shipping costs will be deducted from all returned items.
Any item that is missing accessories, original packaging, or is not returned in the same condition that it was received in, may be subject to a re-stocking fee up to 100% based on the condition we receive it in.
Items broken, damaged, or inoperable due to installer error will not be refunded.
Fill out the return form or give us a call to obtain an RMA and return shipping label.
There are no returns on the Pentair Colorsync 618031
No returns on pool cleaners.
No returns on opened seals and o-rings.
No returns on capacitors.
If a light is returned because it "doesn't work" and it tests fine, the cost to ship and a re-stocking fee will be deducted from the refund.
All products denied upon arrival at customers house WILL be charged the cost to ship.
Visa Gift Card Promotions: Gift cards are sent within 14 days of the order. When accepting the Visa Gift card, you agree that if your order is returned or refunded, this amount will be deducted from the refunded amount. All Visa Gift cards are sent via email in an E-Gift Card format and are non refundable.