Hayward Universal H-Series 400,000 BTU Natural Gas Low NOx Pool Heater with OmniX | W3HS400FDN
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The Hayward Universal H-Series W3HS400FDN combines a 400,000 BTU natural gas burner with OmniX controls, a premium cupro-nickel heat exchanger, patented butterfly bypass technology, zero wall-clearance installation, and reversible plumbing connections for simplified installation and long-term reliability. Warranty: 1-Year Limited Parts Warranty.
Q: What fuel does the W3HS400FDN use? A: This model is designed for natural gas installations.
Q: Is this heater compatible with saltwater pools? A: Yes. The standard cupro-nickel heat exchanger offers excellent resistance to corrosion from saltwater and aggressive pool chemistry.
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Delivery and Shipping
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Description
Description
Hayward Universal H-Series 400,000 BTU Natural Gas Low NOx Pool Heater with OmniX | W3HS400FDN
Heat your pool quickly and efficiently with the Hayward Universal H-Series W3HS400FDN. Featuring 400,000 BTUs of natural gas heating power, OmniX smart controls, and a premium cupro-nickel heat exchanger, this heater delivers dependable comfort for residential pools and spas.
Features
- 400,000 BTU natural gas heater.
- Integrated OmniX universal controls.
- Cupro-nickel heat exchanger for maximum corrosion resistance.
- Low NOx environmentally-friendly operation.
- Fan-assisted combustion with electronic ignition.
- Patented butterfly bypass supports up to 125 GPM.
- Compact footprint with zero wall-clearance installation.
- Universal plumbing adapters simplify replacement installations.
Description
The Hayward W3HS400FDN combines the trusted Universal H-Series platform with OmniX smart controls to deliver rapid, dependable heating for residential pools and spas. Its compact design fits easily into tight equipment pads while minimizing installation time.
The premium cupro-nickel heat exchanger provides exceptional durability in saltwater and chemically demanding environments. Combined with Low NOx emissions, electronic ignition, and Hayward's industry-leading hydraulic efficiency, this heater provides reliable performance season after season.
Pro Tip
Keep water chemistry properly balanced and clean the filter regularly to improve heater efficiency and maximize the lifespan of the heat exchanger and internal components.
Installation Tips
Install outdoors on a level equipment pad with proper ventilation. Verify natural gas supply, electrical service, and plumbing connections before startup. Follow all local codes and Hayward installation requirements.
Specifications
Specifications
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SKU
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UPC or GTIN
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Product Type
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Size/Connection
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Materials
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Power Source
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Dimensions21.5 in, 27.5 in, 31 in
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Warranty
Product Warranty
Product Warranty
We want you to have quick and easy access to warranty information for all the brands we carry. Please click on the links below to view each manufacturer’s warranty page:
- Pentair Warranty
- A&A (Pentair In-Floor) Warranty
- Fluidra Warranty (Zodiac / Jandy / Polaris / Caretaker)
- Paramount Warranty
- BlueSquare Warranty
- Hayward Warranty
- All Other Manufacturer Warranties
Note: Warranty coverage, registration, and service terms are provided directly by the manufacturer. Please review the details carefully to ensure proper understanding of coverage and claim procedures.
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