What do NSF and USL primarily certify?

NSF (National Sanitation Foundation) and USL (Underwriters Laboratories) primarily certify food service equipment to ensure that it meets specific standards for safety and sanitation. This certification process involves rigorous testing to verify that the equipment can be safely used in food preparation and service environments without posing health risks.

The focus on food service equipment is crucial because equipment such as ovens, refrigerators, and dishwashers are fundamental in preventing foodborne illnesses and ensuring food safety. By certifying these products, NSF and UL provide assurance to manufacturers, restaurants, and other food service operators that the equipment complies with health regulations and industry standards.

Other choices like medical devices, water purification systems, and industrial machinery fall under different certification bodies or standards that are tailored to their specific requirements for safety, performance, and health impact.