Hayward Universal H-Series Natural Gas Heater with OmniX 400K
The Hayward Universal H-Series Natural Gas Heater with OmniX 400K is 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.
A 400,000 BTU natural gas heater built for pool applications where OmniX automation integration is required. Backed by a 2-year parts and 1-year labor warranty.
⚠️ Professional Installation Required. Pool heater installation involves gas line connections and electrical wiring. Always use a licensed contractor to ensure safety, code compliance, and warranty validity.
Key Features
OmniX Embedded Intelligence
Enhanced programmability, advanced diagnostics, and seamless remote connectivity built in.
Hayward Universal Display
Consistent, intuitive control experience compatible with Omni, OmniX, and competitive automation systems.
400,000 BTU Natural Gas
Maximum-capacity gas heating for large pool applications.
Drop-In Replacement Design
Engineered for easy replacement with direct compatibility to Hayward plumbing adapters.
Advanced Diagnostics
Built-in diagnostics simplify troubleshooting and reduce service calls.
Seamless Remote Connectivity
Monitor and control from anywhere via OmniX remote access.
2-Year Parts / 1-Year Labor Warranty
Hayward commercial warranty coverage.
Who It's For
- Commercial pool facilities using Hayward Omni or OmniX automation systems
- Drop-in replacement installations compatible with existing Hayward plumbing adapters
- Anyone who needs 400K BTU natural gas heating with integrated automation intelligence
- Facilities requiring advanced remote diagnostics and programmability
Specifications
Heating Performance
| BTU Output | 400,000 BTU |
| Fuel Type | Natural Gas |
Controls & Automation
| Automation | OmniX Embedded Intelligence |
| Display | Hayward Universal Display |
| Compatibility | Omni, OmniX, and competitive automation systems |
Physical
| Product Weight | 213.5 lb |
| Shipping Dimensions | 39.5 × 32.8 × 30.6 in |
Approvals & Warranty
| Application | Pool (Commercial) |
| Warranty | 2 Years Parts / 1 Year Labor |
What's in the Box
- Hayward Universal H-Series Natural Gas Heater with OmniX 400K
- User Manual
Warranty
The Hayward H-Series with OmniX 400K comes with a 2-year parts and 1-year labor manufacturer warranty. Clearflow Pool Supply is an authorized Hayward dealer and will assist with any warranty service needed.
Downloads
Frequently Asked Questions
What is OmniX?
OmniX is Hayward's advanced pool automation platform. When embedded in the heater, it enables enhanced programmability — scheduling, setpoints, diagnostics — and seamless remote connectivity via the OmniX ecosystem. The Universal Display also ensures compatibility with standard Omni systems and even competitive automation platforms.
Is this a drop-in replacement for existing Hayward heaters?
Yes. The H-Series HS400FDN is engineered for easy drop-in replacement with direct compatibility to Hayward plumbing adapters, making it suitable for upgrading existing Hayward heater installations without major replumbing.
Does it work with non-Hayward automation systems?
Yes. The Hayward Universal Display is designed to deliver a consistent control experience across Omni, OmniX, and competitive automation systems — so it can integrate into existing third-party control environments.
Does this heater require professional installation?
Yes. Gas heater installation involves connecting to a natural gas supply line, electrical wiring, and proper venting. A licensed pool contractor must perform the installation to ensure safety, local code compliance, and warranty validity.