The United States has one of the most developed regulatory frameworks for industrial refrigeration, particularly for ammonia systems. At the core of this framework are the IIAR Standards, which are recognized as the official American National Standards (ANSI/IIAR) for the safe design, installation, operation, and maintenance of natural refrigerant systems. These standards set the benchmark for industry practice in the U.S. and serve as a model referenced worldwide.
Ammonia is the dominant refrigerant in large industrial facilities, including food processing, cold storage, and ice production. Federal agencies such as OSHA (Occupational Safety and Health Administration) and the EPA (Environmental Protection Agency) enforce worker safety and environmental protection requirements that complement IIAR’s technical standards. Together, these rules ensure a strong culture of safety, compliance, and training.
The U.S. continues to lead global development of codes and standards for natural refrigerants, with IIAR actively driving technical innovation and advocacy. Through its role as the standard-setting body, IIAR provides not only the regulatory foundation for the U.S. industry but also guidance that shapes practices in many other countries adopting or referencing its ANSI/IIAR standards.
