Certification for Boilers with up to 25% Hydrogen Blending

The ninth edition of ANSI/CAN/UL 795, the Standard for Commercial-Industrial Gas-Fired Package Boilers (2024), set a new industry benchmark for manufacturers, importers, traders and retailers of heating, ventilation, air conditioning and refrigeration (HVACR) systems and products. The updated Standard provides a certification path for systems using up to 25% of hydrogen blended with natural gas, marking a significant step toward sustainability in the boiler industry. Certification in accordance with the requirements of the ninth edition of UL 795 can support manufacturers’ efforts to adapt their systems to the evolving energy landscape.

Key features of UL 795

The ninth edition of UL 795 expands the scope of the Standard over previous editions by providing compatibility with various fuel types, including:

• Gas-fired package boilers
• High-pressure steam and high-temperature water, gas-fired boiler assemblies for the following fuel gases: natural gas, hydrogen-natural gas blends,* LP-gas, LP-gas/air blends, and manufactured gas
• Furnaces
• Air heaters (U.S. only)

Certification under UL 795 is crucial for manufacturers seeking to embrace cleaner energy sources while maintaining compliance with safety regulations.

The binational Standard aligns with requirements of both the American National Standards Institute (ANSI) and the Standards Council of Canada (SCC), helping boilers and other HVAC/R products certified to UL 795 meet the latest safety and performance requirements in both countries.

Why UL Solutions?

Teaming with UL Solutions for UL 795 certification provides manufacturers with direct access to a leader in the combustion industry. Our services include:

• Expert review of current listings – We assess your existing boiler certifications to determine compliance with the new standards.
• Customized solutions – Whether you want to modify current listings or start a new certification process, our team is equipped to guide you through the process.
• Dedicated expertise – Our laboratory staff specializes in boiler products, providing the knowledge and support you need to navigate the complex certification landscape.

With the introduction of hydrogen blending in commercial-industrial boiler applications, now is the time to adapt. UL Solutions stands ready to assist you in understanding the implications of the new ANSI/CAN/UL 795 Standard and how it affects your products.

If you’re ready to explore this new certification path or need assistance with your current products, reach out to us today. UL Solutions is here to help you meet the future of boiler technology with confidence.

* Up to 25% H2 and 75% natural gas blend shall be the limit for the purposes of this Standard. The full Standard is available in the UL Standards Catalog.