Product Overview

The Hayward Universal H-Series In-Ground Natural Gas Heater with OmniX 250K ASME | HS250FDNASME is a commercial-grade pool and spa heater built for applications that require reliable heating, durable construction, advanced controls, and ASME-rated equipment.

Delivering 250,000 BTU/hr, the HS250FDNASME is an excellent heating solution for commercial swimming pools, spas, hotels, resorts, apartment communities, schools, fitness centers, recreation facilities, and other demanding aquatic environments.

Hayward specifically designs its Universal H-Series ASME heaters to withstand the demands of commercial operation with upgraded construction and materials. The HS250FDNASME also incorporates Hayward's OmniX embedded intelligence and Universal Display, providing enhanced programming, advanced diagnostics, and connected-control capabilities.

A durable cupro-nickel heat exchanger provides increased corrosion resistance, while Hayward's managed water-flow system delivers strong hydraulic performance. Low NOx combustion helps meet applicable clean-air standards.

Key Features

• 250,000 BTU natural gas heater
• Commercial ASME configuration
• Built-in OmniX intelligence
• Hayward Universal Display
• Advanced diagnostics and programming
• Remote connectivity capability
• Durable cupro-nickel heat exchanger
• 84% thermal efficiency
• Low NOx emissions
• 25–125 GPM operating flow range
• High-performance hydraulic design
• Front-panel service access
• Universal electrical junction box
• Left- or right-side electrical installation
• Designed for demanding commercial pool and spa applications
• Ideal for replacement or new commercial installations

Product Specifications

Current product specifications list 250,000 BTU input, 84% efficiency, 25–125 GPM flow, 3/4" gas connection, and a cupro-nickel heat exchanger.

Commercial ASME Construction

The HS250FDNASME is intended for commercial-duty pool and spa applications where an ASME heater is specified or required.

Typical applications include:

• Hotels and resorts
• Commercial swimming pools
• Apartment and condominium communities
• Schools and universities
• Recreation centers
• Fitness clubs
• Municipal pools
• Commercial spas
• Hospitality properties

Commercial heater requirements vary by jurisdiction, so installers should always verify applicable mechanical, gas, plumbing, and building codes.

OmniX Smart Control

Hayward's OmniX embedded intelligence provides a modern control experience with enhanced programming and diagnostic capabilities.

The Universal Display allows operators and service professionals to view temperature settings, heater status, operating information, and diagnostic data from an intuitive interface.

When properly configured with compatible Hayward connectivity and automation equipment, OmniX also supports remote equipment management.

Cupro-Nickel Heat Exchanger

The HS250FDNASME uses a cupro-nickel heat exchanger, providing improved resistance to corrosion and premature wear in demanding pool environments.

This makes it particularly well suited for commercial applications where heaters may experience longer operating cycles and higher usage than typical residential installations.

Proper water chemistry must still be maintained at all times to protect the heater and maximize equipment life.

Frequently Asked Questions

Is the HS250FDNASME natural gas?

Yes. The HS250FDNASME is designed specifically for natural gas.

How many BTUs does it produce?

This model is rated at 250,000 BTU/hr.

Is this an ASME heater?

Yes. The HS250FDNASME is part of Hayward's Universal H-Series ASME commercial heater lineup.

What is the difference between HS250FDN and HS250FDNASME?

The HS250FDN is the standard Universal H-Series 250K heater, while the HS250FDNASME is the commercial ASME configuration intended for more demanding commercial applications.

Does it include OmniX?

Yes. The heater features OmniX embedded intelligence and Hayward's Universal Display.

What type of heat exchanger does it use?

The HS250FDNASME uses a cupro-nickel heat exchanger.

What water flow does it require?

The listed operating range is approximately 25 to 125 GPM.

What is the heater's efficiency?

The HS250FDNASME is rated at approximately 84% thermal efficiency.

Is this suitable for hotels and commercial properties?

Yes. Hayward specifically positions its ASME heater line for demanding commercial operation.

Is professional installation recommended?

Yes. Installation should be performed by a qualified pool-heater or gas professional. Correct gas-line sizing, ventilation, electrical connections, water flow, and local-code compliance are essential for safe and reliable operation.