• Hayward Universal H-Series W3HS400FDN In-Ground Natural Gas Heater with OmniX 400K
  • Hayward OmniX Universal H-Series Natural Gas 400,000 BTU Low NOx W3HS400FDN - view 2

Hayward OmniX Universal H-Series Natural Gas 400,000 BTU Low NOx - W3HS400FDN

Universal H-Series pool and spa gas heaters are engineered for easy drop-in replacement, with direct compatibility to Hayward plumbing adapters. At the center is Hayward’s Universal Display, delivering a consistent, intuitive control experience across Omni®, OmniX®, and competitive automation systems. With OmniX embedded intelligence, the heater provides enhanced programmability, advanced diagnostics, and seamless remote connectivity.

GTIN: 610377469159
SKU: W3HS400FDN
Brand: Hayward
$5,399.00
$6,999.00
Tax calculated at checkout.
SAVE $1,600 23% off regular price
In stock
  • Free Shipping On orders over $75
  • 30-Day Returns Easy return policy
  • Amazing Support Monday – Friday

Universal H-Series pool and spa gas heaters are engineered for easy drop-in replacement, with direct compatibility to Hayward plumbing adapters. At the center is Hayward’s Universal Display, delivering a consistent, intuitive control experience across Omni®, OmniX®, and competitive automation systems. With OmniX embedded intelligence, the heater provides enhanced programmability, advanced diagnostics, and seamless remote connectivity.

Key Features

  • 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
  • Reduction in pump run-time results in significant cost savings
  • 2" x 2 1/2" CPVC union plumbing connections
  • Forced draft system constantly moves air through the combustion chamber at a precise flow rate, eliminating the need for a high-wind stack
  • Low NOx emissions - meets clean air quality standards
Important Information
California Prop 65Prop 65 Cancer and Reproductive Harm Warning

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov