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HAYWARD UNIVERSAL H-SERIES W3HS250FDN LOW NOX OMNIX NATURAL GAS POOL & SPA HEATER – 250K BTU, CUPRO-NICKEL HEAT EXCHANGER
Dimensions: 24" H x 25" W x 29.5" D
Heating Capacity: 250,000 BTU
Thermal Efficiency: Approx. 82%
Fuel Type: Natural Gas
Heat Exchanger: Cupro-Nickel
Water Flow Rate: 25-125 GPM
Controls: OmniX Smart Automation
Emissions: Low NOx
The Hayward W3HS250FDN Natural Gas Pool & Spa Heater with OmniX delivers 250,000 BTU and adds embedded smart automation to the proven Universal H-Series platform.
OmniX is the difference. Intelligence is built into the heater itself rather than requiring a separate control panel, so you get app-based remote temperature control, scheduling, wireless coordination with pumps and other equipment, and advanced diagnostics straight out of the box. An optional OmniX Gateway extends control beyond Bluetooth range to anywhere with a connection.
Underneath, the hardware is the Universal H-Series you know: a cupro-nickel heat exchanger for salt water and chemical corrosion resistance, a forced-draft combustion system that removes the need for a high-wind stack, and Low NOx emissions meeting clean-air standards. Hayward plumbing adapters allow drop-in replacement of an existing heater.
Key Features
- 250,000 BTU heating capacity
- Approximately 82% thermal efficiency
- Natural Gas
- OmniX embedded smart automation
- App-based remote temperature control and scheduling
- Wireless coordination with pumps and other equipment
- Advanced onboard diagnostics
- Universal Display for consistent controls across automation systems
- Optional OmniX Gateway for control from anywhere
- Cupro-nickel heat exchanger
- Forced-draft combustion system
- Low NOx emissions
- 25-125 GPM water flow rate
- Drop-in replacement with Hayward plumbing adapters
Specifications
| Specification | Details |
| Brand | Hayward |
| Part Number | W3HS250FDN |
| Model | HS250FDN |
| Series | Universal H-Series with OmniX (Open Line) |
| Fuel Type | Natural Gas |
| BTU Input | 250,000 BTU |
| Thermal Efficiency | Approx. 82% |
| Heat Exchanger | Cupro-Nickel |
| Water Flow Rate | 25-125 GPM |
| Dimensions | 24" H x 25" W x 29.5" D |
| Shipping Weight | 170.5 lbs |
| Voltage | 120/240V |
| Phase | Single Phase |
| Frequency | 60 Hz |
| Circuit Amps | 5.5 A |
| Maximum Breaker Size | 15 A |
| Controls | OmniX Smart Automation |
| Emissions | Low NOx |
| Clearances | 12" Sides / 6" Rear |
| Pool Type | In-Ground |
| Warranty | 1-Year Parts (Open Line) |
What's Included
- Hayward W3HS250FDN Natural Gas Pool & Spa Heater with OmniX
- Cupro-nickel heat exchanger assembly
- OmniX control system with Universal Display
- Installation and operation documentation
The Hayward W3HS250FDN pairs 250,000 BTU and a cupro-nickel exchanger with OmniX embedded automation, giving app control and diagnostics without a separate control panel.
Learn more at Hayward:
https://www.hayward.com/universal-h-series-heater-250-000-btu-natural-gas-w-omnix-open-line-w3hs250fdn.html
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