Hayward Universal H-Series Lo-Nox Inground Pool Heater
Powerful Heating Performance
The Hayward Universal H-Series is built to heat your pool or spa quickly and efficiently. Its advanced hydraulic design helps move water through the heater with less restriction, helping deliver strong heating performance while reducing wasted energy.
Designed to bring pool and spa water up to temperature quickly.
Up to 84% thermal efficiency for dependable performance.
Great for heating inground pools, attached spas, and stand-alone spas.
Get comfortable water temperatures without making a whole career out of waiting.


Cupro-Nickel Heat Exchanger
At the heart of every Hayward Universal H-Series heater is a durable cupro-nickel heat exchanger engineered for long-lasting performance. Cupro-nickel offers superior resistance to corrosion, erosion, and harsh pool water conditions, helping extend the life of your heater while maintaining excellent heat transfer efficiency.
Built to withstand demanding pool and spa environments.
Designed for years of reliable heating performance.
Efficiently transfers heat to maximize performance.
An excellent choice for pools equipped with salt chlorination systems.
Universal Fit Installation
The Hayward Universal H-Series was designed to simplify new installations and replacement projects. Flexible plumbing and electrical connections help the heater fit a wide variety of equipment pads, making it easier to replace older heaters while minimizing costly plumbing modifications.
Fits many existing pool equipment layouts.
Flexible electrical compatibility for a variety of installations.
Works with common pool plumbing configurations.
May reduce installation time and equipment pad modifications.

Low NOx Environmental Design
The Hayward Universal H-Series Low NOx heater is engineered for efficient combustion and reduced emissions, making it an excellent choice for homeowners in areas with strict air-quality regulations. Enjoy powerful pool and spa heating while helping reduce environmental impact.
Designed to significantly reduce nitrogen oxide emissions compared to traditional heater designs.
Meets strict California emissions standards for pool and spa heaters.
Approved for installation in regions requiring Low NOx equipment.
Advanced burner technology delivers dependable heating performance while minimizing emissions.
Digital Controls & Diagnostics
The Hayward Universal H-Series makes heater operation simple with an intuitive digital control panel, electronic ignition, and built-in diagnostic messaging. Set your desired temperature, monitor operation, and quickly identify service needs without decoding a wall of mystery lights like some kind of pool equipment archaeologist.
Easy-to-read controls for simple heater operation.
Reliable start-up without a standing pilot light.
Helps identify heater status and service conditions.
Set and maintain comfortable pool or spa temperatures.

Hayward Universal H-Series Specifications
150k, 200k, 250k, 300k & 400k
Natural Gas or Propane
Up to 84%
Cupro-Nickel
110V / 220V Compatible
2" x 2.5" CPVC
Electronic Ignition
Low NOx Design
Inground Pools & Spas


