Hayward Universal HC Series Dual Fuel Heater with OmniX 400K
The Hayward Universal HC Series Dual Fuel Heater with OmniX 400K combines dual-fuel flexibility with premium automation intelligence. Engineered for easy drop-in replacement with direct compatibility to Hayward plumbing adapters, and featuring OmniX embedded intelligence for enhanced programmability, advanced diagnostics, and seamless remote connectivity.
Built by Hayward with a durable cupro-nickel heat exchanger, Hayward's Universal Display compatible with Omni, OmniX, and competitive automation systems, compact zero-clearance design, and simple propane conversion for fast and flexible installation. 400,000 BTU outdoor-rated dual-fuel heater. Backed by a 3-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
Dual-Fuel: Natural Gas and Propane
Simple propane conversion makes installation faster and easier — works with both NG and LP.
400,000 BTU Output
Maximum-capacity dual-fuel heating for in-ground pools and spas.
OmniX Embedded Intelligence
Enhanced programmability, advanced diagnostics, and seamless remote connectivity built in.
Hayward Universal Display
Consistent control experience across Omni, OmniX, and competitive automation systems.
Cupro-Nickel Heat Exchanger
Durable cupro-nickel for long-term reliability and corrosion resistance.
Drop-In Replacement for Any Brand
Engineered for Hayward plumbing adapters — easy replacement for competitors' heaters.
Zero-Clearance Compact Design
Fits even the tightest equipment pads — no wall clearance required.
Advanced Diagnostics
Built-in diagnostics simplify troubleshooting and reduce service calls.
3-Year Parts / 1-Year Labor Warranty
Strong warranty coverage for residential installation.
Who It's For
- Pool owners using Hayward OmniX automation who want 400K BTU dual-fuel flexibility
- Drop-in replacement installations compatible with existing Hayward or competitor plumbing
- Salt water pools and chemically demanding applications benefiting from cupro-nickel construction
- Compact equipment pads where zero-clearance design is essential
Specifications
Heating Performance
| BTU Output | 400,000 BTU |
| Fuel Type | Natural Gas / Liquid Propane (Dual-Fuel) |
Controls & Automation
| Automation | OmniX Embedded Intelligence |
| Display | Hayward Universal Display |
| Compatibility | Omni, OmniX, and competitive automation systems |
Construction
| Heat Exchanger | Cupro Nickel |
| Wall Clearance Required | Zero |
Physical
| Product Weight | 168 lb |
| Shipping Dimensions | 31 × 24 × 40 in |
| Application | Outdoor |
Approvals & Warranty
| Warranty | 3 Years Parts / 1 Year Labor |
What's in the Box
- Hayward Universal HC Series Dual Fuel Heater with OmniX 400K
- User Manual
Warranty
The Hayward HC Series HDFS400 comes with a 3-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
How does this compare to the HDF275 dual-fuel model?
The HDFS400 adds OmniX embedded intelligence and a 400K BTU output vs. 275K BTU on the HDF275. Both share dual-fuel capability, zero-clearance design, and cupro-nickel heat exchangers. The HDFS400 is the right choice when you need maximum BTU output with full OmniX automation integration. The HDF275 (5-year parts warranty) offers a longer parts warranty than the HDFS400 (3-year parts).
What is OmniX?
OmniX is Hayward's advanced pool automation platform. Embedded in this heater, it enables enhanced programmability, advanced diagnostics, and seamless remote connectivity via the OmniX ecosystem. The Universal Display also ensures compatibility with standard Omni systems and competitive automation platforms.
How does propane conversion work?
The HDFS400 ships ready for natural gas. Simple propane conversion components allow your licensed installer to switch fuel sources at installation time or later — making it one of the most flexible heaters available for installations where fuel availability may change.
Is this outdoor-only?
Yes. The HDFS400 is rated for outdoor installation only. For indoor pool installations, consult your licensed contractor for appropriate venting and code requirements for the specific unit.
Does this heater require professional installation?
Yes. Gas heater installation involves connecting to a natural gas or propane supply line, electrical wiring, and proper venting. A licensed pool contractor must perform the installation to ensure safety, local code compliance, and warranty validity.