June 10, 2026

When it comes to pool comfort, heating is everything. Whether you’re extending your swimming season or enjoying a late-night soak, having a reliable heater is key. Enter Hayward gas heaters with OmniX—a new generation of pool equipment that blends powerful heating with smart automation.

In this guide, we’ll break down what makes gas heaters with OmniX stand out, highlight the Universal HC Series 400k BTU and Universal H-Series 135k BTU models, and explain why this technology is quickly becoming a top choice for pool owners.

What Is Hayward OmniX?

Hayward’s OmniX platform is a built-in smart automation system that transforms traditional pool equipment into a connected ecosystem. Instead of relying on central control panels, OmniX embeds intelligence directly into each device—like heaters, pumps, and lights.

Learn more here: Hayward OmniX Smart Platform

Key Benefits of OmniX Technology

  • Remote control via mobile app – adjust temperature from the palm of your hand
  • Wireless connectivity between equipment for seamless integration
  • Scalable automation – start with a heater and expand over time
  • No central control panel required, simplifying installation
  • Control from anywhere – with the purchase of a OmniX Gateway

In short, OmniX brings smart-home convenience to your pool—without complexity.

Spotlight: Universal HC Series 400,000 BTU Gas Heater

One of the most powerful options in the Hayward lineup is the Universal HC Series 400k BTU natural gas heater (HDFS400), designed for large pools and high-demand heating applications.

View product: Universal H-Series 400,000 BTU Heater(opens in a new tab)

Key Specs

  • 400,000 BTU heating capacity
  • Dual-Fuel (supports both propane and natural gas)
  • Compact, lightweight design makes installation easy in any environment
  • Ideal for in-ground pools and spas, including large-capacity pools
  • Product Guide

Spotlight: Universal H-Series 135,000 BTU Gas Heater with OmniX

One of the most versatile options in the OmniX lineup is the Universal H-Series 135k BTU natural gas heater (HS135FDN).                                                                     

View product: Universal H-Series 135k BTU Heater with OmniX

Key Specs

  • 135,000 BTU heating capacity
  • Natural gas (propane option available)
  • Designed for above-ground pools and spas
  • Durable yet lightweight built with a durable cupro nickel heat exchanger
  • Product Guide
 

 

 

Why Gas Heaters with OmniX Stand Out

1. Fast, Reliable Heating Performance

Hayward gas heaters are engineered for rapid heat-up, delivering warm, comfortable water in less time. This “speed-to-heat” capability makes it ideal for spontaneous pool use or cooler climates.

2. Built for Durability

Each unit features a cupro-nickel heat exchanger, offering superior protection against corrosion and chemical imbalance. This ensures longer lifespan and fewer maintenance issues.

3. Smart Heating Control from Anywhere

With OmniX, your heater becomes fully connected.

Using the mobile app, you can:

  • Set and adjust pool temperature remotely
  • Schedule heating times
  • Monitor system performance

Add the optional gateway and you can control your pool from virtually anywhere—not just within Bluetooth range.

4. Advanced Diagnostics & Automation

OmniX doesn’t just control—it also coordinates.

  • Enhanced diagnostics help identify issues quickly
  • Programmable settings optimize performance
  • Integrated automation coordinates with pumps and other equipment

This level of intelligence simplifies maintenance and improves long-term efficiency.

5. Easy Installation & Service-Friendly Design

Hayward designed these heaters with both homeowners and installers in mind:

  • Drop-in replacement compatibility with existing systems
  • Flexible electrical connections for simplified setup

These features reduce installation time and service costs.

6. Energy Efficiency & Low Emissions

Gas heaters with OmniX are built for performance and sustainability:

  • ~82% efficiency rating for reduced fuel usage
  • Low NOx emissions that meet environmental standards
  • Optimized water flow to reduce pump runtime and energy use

The result? Lower operating costs and a smaller environmental footprint.

OmniX Works for Any Pool Setup

The Universal H-Series lineup includes multiple sizes—from compact 135k BTU models to powerful 500k BTU systems—making it suitable for:

  • Above-ground pools
  • In-ground pools
  • Spas and hot tubs
  • Residential and commercial applications

Because OmniX is modular, you can start with a heater and gradually add smart pumps that all work together seamlessly.  

OmniX enabled Gas Heater Lineup

Hayward’s OmniX enabled gas heaters are available in a wide range of sizes and configurations, making it easy to match the right solution to any pool or spa application—from compact backyard setups to large commercial systems. These models feature high-efficiency heating, durable cupro-nickel construction, and smart-ready capabilities for modern pool environments.

Below is a complete lineup, organized in the same style as the product highlights above:

Universal H-Series Gas Heaters with OmniX

·       HS135FDN
HEATER – Universal 135 NA Low NOx

·       HS135FDP
HEATER – Universal 135 LP Low NOx

·       HS150FDN
HEATER – Smart 150 NA Low NOx

·       HS150FDP
HEATER – Smart 150 LP Low NOx

·       HS200FDN
HEATER – Smart 200 NA Low NOx

·       HS200FDP
HEATER – Smart 200 LP Low NOx

·       HS250FDN
HEATER – Smart 250 NA Low NOx

·       HS250FDP
HEATER – Smart 250 LP Low NOx

·       HS400FDN
HEATER – Smart 400 NA Low NOx

·       HS400FDP
HEATER – Smart 400 LP Low NOx

·       HS500FDN
HEATER – Smart 500 NA Low NOx

·       HS500FDP
HEATER – Smart 500 LP Low NOx

Universal HC Series Dual Fuel Heaters with OmniX

·       HDFS275
HEATER – Dual Fuel Smart 275K

·       HDFS400
HEATER – Dual Fuel Smart 400K

ASME Commercial-Grade Heaters with OmniX

·       HS250FDNASME
HEATER – Smart 250 NA Low NOx (ASME)

·       HS250FDPASME
HEATER – Smart 250 LP Low NOx (ASME)

·       HS400FDNASME
HEATER – Smart 400 NA Low NOx (ASME)

·       HS400FDPASME
HEATER – Smart 400 LP Low NOx (ASME)

·       HS500FDNASME
HEATER – Smart 500 NA Low NOx (ASME)

·       HS500FDPASME
HEATER – Universal 500 LP Low NOx (ASME)

Retrofit Displays – Add OmniX to your existing heater

·       FDXLDSPX1930
UHS Replacement Display

·       HDXFCAP002
HC Replacement Display

Choosing the Right Model

With options ranging from 135,000 BTU to 500,000+ BTU, this lineup is designed to cover:

  • Smaller above-ground pools and spas (135K–150K BTU)
  • Mid-size residential pools (200K–250K BTU)
  • Large in-ground pools (400K–500K BTU)
  • Commercial and high-demand environments (ASME-certified models)

These heaters now feature OmniX-ready smart technology, allowing users to monitor and control temperature, schedules, and diagnostics from a mobile device.

Final Thoughts: Is a Heater with OmniX Worth It?

If you’re looking for a pool heater that combines power, durability, and modern smart control, Hayward gas heaters with OmniX are hard to beat.

Top Reasons to Choose OmniX

  • Smart control from your phone
  • Fast, efficient heating performance
  • Long-lasting, corrosion-resistant design
  • Easy installation and maintenance
  • Expandable automation for future upgradesy
  • By integrating intelligent technology directly into the heater, OmniX eliminates the complexity of traditional automation systems—delivering a simpler, smarter pool experience

 

Ready to Upgrade Your Pool Heating?

With Hayward OmniX, you’re not just heating your pool—you’re upgrading the entire experience.