Hayward Universal 250,000 BTU H Series Low NOx Natural Gas Swimming Pool Heater

Hayward Universal 250,000 BTU H Series Low NOx Natural Gas Swimming Pool Heater

Name: Hayward Universal 250,000 BTU H Series Low NOx Natural Gas Swimming Pool Heater
SKU: H250FDN
Price: 3999 CAD
Availability: InStock
Rating: 5.00 (1 reviews)

SKU#: W3H250FDN

5.0

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$3,999.00

$4,199.99

You save 5%

Availability: In Stock

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Powerful 250K BTU Heating: Quickly heats medium to large pools and spas, helping you enjoy warm water faster without long wait times
Durable Cupro Nickel Heat Exchanger: Built to handle fluctuating water chemistry and resist corrosion, making it ideal for long-term use—even in saltwater pools
Energy-Efficient Design: Features Hayward’s patented polymer header and bypass valve for optimal hydraulic performance and reduced energy costs
Electronic Ignition System: Reliable, automatic ignition eliminates the need for a pilot light and only activates when heat is needed
User-Friendly Digital Controls: LED control panel lets you easily set and monitor water temperature with precision and convenience

Overview Manuals & Guides Reviews Q & A

Hayward Universal BTU H Series Low NOx Pool Heater

Combining advanced technology with universal-fit flexibility, the Hayward Universal H-Series heater is a smart choice for virtually any new installation or existing system upgrade. Delivering state-of-the-industry performance, outstanding energy efficiency, extremely low NOx emission levels and legendary durability and reliability. A choice of left-side or right-side electric, gas and water connections gives the Universal H-Series heaters unprecedented installation flexibility. This enhanced adaptability - coupled with lightweight design, modern low-profile appearance and only front-panel access required for installation and service - ensures compatibility with virtually all new or existing systems and equipment pad conditions.

Features

STANDARD Cupro-Nickel Heater Exchanger

Totally managed flow provides exceptional corrosion resistance and erosion protection. Ideal for salt-based electronic chlorination systems.

Superior Hydraulic Performance and Reliability

Industry-leading hydraulic performance saves energy by reducing circulation pump run time.

Digital LED Control Panel / Electronic Control

Display maintains water temperature and monitors heater performance with self-diagnostic capability.

Insulated Fire Tile Combustion Chamber

Unlike older forms of insulation, Fire Tile securely traps the heat, delivering the most performance from each BTU.

Product Video

https://youtube.com/embed/LfzvNPt_Jj0

Specs

Specifications
Model Number	H250FDN
BTU	250,000
Width	28"
Depth	29½"
Height	24"
Water Connections	2" x 2½"
Heat Exchanger	Cupro Nickel
Indoor Vent Pipe Diameter	4" for Positive-Pressure Vent Kit and 6" for Negative Pressure Vent Kit
Heater Weight (Lbs)	134
Gas Connection	¾"
Warranty	1 Year on Parts/Labor

Warranty

1 Year Manufacturer's Warranty from the date of installation. Please refer to Owners Manual for more details.

By michaelVerified Buyer

08/10/21

Have not installed my new heater but same as last one which was very efficient

What's the thermal efficiency of this model? 1 Answer

The H250FDN boasts a thermal efficiency of 83%, meaning it effectively converts a significant portion of fuel into usable heat, ensuring energy-efficient operation.

Can the Hayward H250FDN be used at high altitudes? 1 Answer

Yes, it’s good up to 2,000 feet right out of the box. If your pool’s higher than that, you’ll need the FDXLHAK1930 conversion kit, which lets it run properly up to around 10,200 feet.

Does the heater come with a power cord? 1 Answer

No, the H250FDN doesn't include a power cord. It's preset for 220V but can be wired for 110V. Your electrician will need to supply and install the appropriate cord during setup.
Answered by Swapnilstaff on August 5, 2024

Is this heater compatible with variable speed pumps? 1 Answer

Absolutely. The H250FDN is designed to work with variable speed pumps. It features a pressure switch that ensures the heater operates only when there's adequate water flow, protecting the unit from potential damage.
Answered by Davestaff on March 30, 2025

Is the H250FDN a good choice for pools in Canada? 1 Answer

Definitely. It’s built to handle cooler temps and unpredictable weather, which makes it a solid pick for Canadian backyards. Whether you're in Ontario or out west, it’ll help stretch your swim season comfortably.
Answered by Swapnilstaff on September 12, 2025

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