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Hayward H250FDN Universal H-Series Natural Gas Pool Heater 250k BTU

In stock
Price in points: 68980 points
I acknowledge that all natural gas and propane heaters are final sale and must be installed by a certified gas technician; self-installation can void manufacturer's warranty.

Quick Overview

Hayward Pool Heater W3H250FDN previously H250FDN Low Nox 250,000BTU. New Online Replacement Model W3H250FDN,

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Hayward W3H250FDN Universal H-Series, 250K-BTU Natural Gas Pool Heater

During the first few weeks of the summer season, nothing is more frustrating than ice-cold pool water. Frigid water at the beginning and end of the swimming season is one of the biggest reasons that pools aren't used to their full potential. With a Hayward natural gas pool heater, you can add a little warmth to your water, making your pool tempting and inviting each and every day of the swimming season.

Reliable Natural Gas Heating from Hayward

Hayward is one of the best-known and most trusted names in providing pool equipment. With the H-Series heater, Hayward has created an efficient, powerful, and environmentally-friendly heating option for pool owners.

The H-Series heater has been designed to efficiently and effectively warm pool water, with a minumum of effort and hassle. The H-Series heater has been designed to stand up to the harsh elements of outdoor operation - even the wind and rain. You can rely on your H-Series heater to start up and provide heat every day of the summer season.

The H-Series has been designed for compatible installation for almost any pool configuration. Perfectly suited for new pool builds, or to replace an existing heater - you'll love the flexible options of the H-Series.

The H-Series offers the most in performance, and in ease of use for pool heaters. You can set your heater to maintain a preferred temperature, or make a quick change in the moment for a spontaneous swim.

Get more from your pool this summer

When the summer starts to heat up, nothing is more exciting than hopping into the pool for a spontaneous swim. But, at the beginning and the end of the summer season, the weather outside may seem nicer than the frigid water in your pool. With a pool heater, you have the option of opening your pool earlier, closing it later, and enjoying more swims throughout the whole summer season.

Many pool-owners hesitate to install a heater in their pool because of the expense. With the Hayward H-Series Heaters, you'll be able to warm your pool and extend your season with an affordable purchase cost, and affordable operation.


  • Standard cupro nickel heat exchanger
  • Excellent salt water and chemical corrosion resistance
  • Exclusive 'Totally Managed' cupro nickel heat exchanger water flow
  • Same water velocity through all tubes for faster heating
  • Patented header by-pass design
  • Up to 18% savings by reducing pump run-time
  • 2inx 2 1/2in CPVC union plumbing connections
  • Common union for installation or service, adapts to larger plumbing recommended for Ggeater efficiencies
  • Low NOx Emissions - Meets clean air quality standards

Manufacturer Warranty: 1 Year

Dual Voltage
Heater Fuel:
Natural Gas
Heater Pool Type:
Suitable for Saltwater:
I didn't know much about heaters when initially bought it in 2018. It's been running great with no complaints. Today I'm going to buy a salt system from Toronto Pool Supplies so decided to leave my review for the heater as well :) Thanks God I was told that Hayward H-series heaters are compatible with fresh water and salt water before I purchased, that's why now I am able to switch! Thanks!
Decided to buy it in advance before everything ran out of stock. Also, I've submitted an installation quote and soon after was contacted by Anastasia from Toronto Pool Service. Everything was smooth and easy going, can't wait when for the swimming season to begin!
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Just a quick reminder - Toronto Pool Supplies is an online-only store. Our Concord, ON location is a pickup point, not a retail store and we cannot service walk-in customers. If you want to pick up your items in person please place an order online first and we will email you when it's available for pickup.

Hours: Mon-Wed: 9AM-6PM / Thu: 9AM-8PM (Extended) / Fri: 9AM-6PM