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Hayward Universal H-Series W3H250FDN 250K BTU Natural Gas Pool & Spa Heater, Low NOx

W3H250FDN

In stock. Usually ships in 1–2 business days.

Key Specs

Hayward Universal H-Series W3H250FDN 250K BTU Natural Gas Pool & Spa Heater, Low NOx

BTU
250,000
Fuel
Natural gas
Heat Exchanger
Cupro-nickel
Voltage
115V / 120V, 230V
Warranty
1-year parts, no labor

The Universal H-Series 250,000 BTU is a Low NOx natural gas pool and spa heater. It is sized for mid-size in-ground pools that need fast, reliable heat.

Key features

  • BTU: 250,000
  • Fuel: Natural gas
  • Heat Exchanger: Cupro-nickel
  • Voltage: 115V / 120V, 230V
  • Warranty: 1-year parts, no labor coverage (online purchase)

Who it is for

  • Pool and spa owners with a natural gas or propane supply
  • Homes that want fast, on-demand heating

Before you order

Confirm your gas type (natural gas or propane) and your elevation before ordering; a licensed gas installer should connect the heater. Choose the option that matches your fuel.

What is included

  • Hayward Universal H-Series Heater 250,000 BTU - Natural Gas, Low NOx (W3H250FDN)

Key Features

  • BTU: 250,000
  • Fuel: Natural gas
  • Heat Exchanger: Cupro-nickel
  • Voltage: 115V / 120V, 230V
  • 1-year Hayward parts warranty (no labor) on online purchases

Who It's For

  • Pool and spa owners with a natural gas or propane supply
  • Homes that want fast, on-demand heating

What's Included

  • Hayward Universal H-Series Heater 250,000 BTU - Natural Gas, Low NOx (W3H250FDN)

About the Brand

Hayward builds pumps, filters, heaters, cleaners, sanitizers, lighting and automation for residential and commercial pools.

Pool Direct Supply is an authorized Hayward online reseller for W3 whole goods and Open Line replacement parts, white goods and accessories.

Identification

Brand
Hayward
Product Line
Universal H-Series
Model / Part Numbers
W3H250FDN

Details

Pool Type
In-ground
Warranty (years, parts)
1
Certifications
Low NOx
Fuel
Natural gas
Heat Exchanger
Cupro-nickel

Electrical

Voltage
115V / 120V, 230V
Phase
Single phase

Performance

BTU
250000

Specifications

Product Dimensions
24 " x 25 " x 29.5 "
Side Clearance
12"
Rear Clearance
6"
Maximum Breaker Size (Amps)
15
Minimum Operating Temperature
40 degF

Hayward warranty for this product as purchased online: 1-year parts, no labor coverage.

Warranty terms are set by Hayward; contact our team for claim help.

  • Free standard shipping on most orders in the lower 48
  • Authorized dealer, full manufacturer warranty
  • Price match on identical in-stock items
  • Real pool experts on the phone: (817) 587-4397
Get it now. Pay over time.
Financing

Get it now. Pay over time.

Split any order over $50 into monthly payments with Shop Pay Installments, as low as 0% APR, no hidden fees, decision in seconds at checkout. Bigger jobs? Ask about net terms on a trade account.

0% APR On qualifying 4-payment plans
3–24 mo Monthly plans on orders $150–$20,000
No impact Checking eligibility won't affect credit

Frequently Asked Questions

Use our Request a Quote page and include the product, configuration, intended use, and delivery ZIP code. We reply within 12 business hours. You can also call or text us at (817) 587-4397.

Yes, on most orders. Free standard shipping is included on most orders delivered within the United States. Some oversized or freight-only items are quoted for your delivery address — the product page will tell you before you buy.

Yes. Orders under $1,000 split into 4 interest-free payments with Shop Pay. Larger orders — most of our equipment — split into 3, 6, 12, 18, or 24 monthly payments at 0%–36% APR depending on your credit. Checking your options at checkout does not affect your credit score.

Most eligible products have a 30-calendar-day return-request window. Written return authorization is required — do not ship a return before approval. Return freight on oversized items is at the buyer's cost and can be substantial.

Coverage follows the applicable manufacturer's warranty. We are an authorized dealer for the brands we carry and can help route eligible warranty claims. Contact us with your order number, product details, and photos of the issue.

Yes. We match the total delivered price for an identical in-stock item from an authorized U.S. retailer, before purchase or within 7 days after. Call or text (817) 587-4397 or email hello@pooldirectsupply.com to request a match.