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Flammable Refrigerants Testing for Air Conditioning and Refrigeration

As an industry expert and U.S. Environmental Protection Agency (EPA)-recognized certification body for the Energy Star® program, UL is well-equipped to help you overcome complex design challenges associated with flammable refrigerants.

Rooftop air conditioning system


A disruptive change is currently underway in the heating, ventilation, air conditioning and refrigeration (HVAC-R) refrigerant market. Driven by environmental concerns, global promoters are advocating the phase-out of traditional refrigerants in favor of new alternatives with a lower global warming potential (GWP).

New regulatory guidelines mean that businesses face different requirements depending on where and how they operate.  A large number of new refrigerants have emerged, along with new technology to support them.

UL recently completed a landmark joint study with the Air-Conditioning, Heating and Refrigeration Institute (AHRI) investigating the use of these environmentally friendly refrigerants. To capture all current market changes, ease global market access, and simplify testing, UL is also transitioning our traditional Standards, including UL 1995 and UL 484, to harmonized International Electrotechnical Commission (IEC) standards.


We have been involved in the implementation of flammable refrigerants in the U.S. market since day one. Our deep technical expertise and advocacy for safety throughout the industry with organizations, such as the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) and AHRI allows us – and you – to keep pace with refrigerant industry requirements and global demands.

Why UL

UL’s technical experts are thought leaders in this space and can offer assistance from the earliest stage of product development to installation and global market navigation. For added flexibility to meet your needs in this evolving space, our services are designed to be modular, allowing you to benefit from UL’s expertise when you need it most.


closeup of gas cylinders with valves


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