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Hayward Universal H-Series Natural Gas Heater 250K BTU 120/240V W3H250FDN
Hayward Universal H-Series Natural Gas Heater 250K BTU 120/240V W3H250FDN
A high-efficiency, natural gas pool heater with a durable cupro-nickel heat exchanger, designed for optimal heating performance and energy savings.
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The Hayward Universal H-Series 250K BTU Natural Gas Pool Heater delivers high-efficiency heating with a powerful cupro-nickel heat exchanger, ensuring rapid and reliable temperature control for in-ground pools.
Designed for energy savings, this heater reduces pump run-time and fuel consumption, lowering operating costs while maintaining superior performance.
Its corrosion-resistant construction is ideal for saltwater and chemically treated pools, ensuring long-lasting durability and minimal maintenance.
With low NOx emissions, the Universal H-Series meets clean air quality standards, making it an environmentally friendly choice for pool owners.
Adaptable installation with CPVC union plumbing connections allows seamless integration with existing pool systems, offering convenience and efficiency.

⭐⭐⭐⭐⭐
Customers appreciate the Hayward Universal H-Series for its reliable and consistent heating performance.
Many users highlight its energy efficiency, noting significant savings on their gas bills.
The corrosion-resistant construction makes it a top choice for saltwater pool owners who need durability.
Installation is praised for being straightforward, even for those replacing an older heater.
Overall, users find this heater to be a high-quality investment that delivers long-term value.

- Standard cupro-nickel heat exchanger for enhanced durability and performance
- Saltwater and chemical-resistant construction for extended lifespan
- Even water velocity through all tubes to prevent erosion and improve efficiency
- Patented header by-pass design to optimize water flow and reduce heating time
- Energy-efficient operation with reduced pump run-time and fuel savings
- 2" x 2.5" CPVC union plumbing connections for simple installation and servicing
- Low NOx emissions meeting strict air quality standards
- Compact, space-saving design suitable for new and retrofit applications

- Active Defrost: No
- Application: New Construction, Renovation
- Boost Mode: No
- Brand: Hayward
- Fuel Type: Natural Gas
- Heating Capacity (BTU/hr): 250,000
- Hertz: 60 Hz
- Kilowatts: 73 kW
- Low Ambient Operation: Yes
- Phase Heaters: 1
- Pool Type: In Ground
- Product Dimensions: 24" x 25" x 29.5"
- Product Weight: 165 lb
- Rear Clearance: 6 in
- Side Clearance: 12 in
- Shipping Dimensions: 30.6" x 32.8" x 33.3"
- Shipping Weight: 171 lb
- Water Flow Rate Min: 25 GPM
- Water Flow Rate Max: 125 GPM


Q: Is this heater suitable for saltwater pools?
Yes, the Hayward Universal H-Series features a cupro-nickel heat exchanger that resists corrosion from saltwater and chemically treated pools, ensuring long-lasting durability.
Q: Can this heater be installed on an existing pool system?
Absolutely! The adaptable CPVC union plumbing connections allow for easy integration with both new and existing pool setups.
Q: How energy-efficient is this pool heater?
This heater is designed to reduce pump run-time and fuel consumption, leading to lower operating costs while maintaining efficient and powerful heating.


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