The registered NSF Certification Mark on a food equipment product confirms that NSF has assessed -- and certified -- its conformity with the relevant NSF/ANSI standard. As part of the certification process, the production facility is audited annually. The purpose of this audit is to assure that all the requirements of the standard continue to be met, quality assurance and quality control procedures are followed in fabrication, products are sampled and retested on schedule, and labeling and product literature are true and accurate.  For more information on NSF Certification, visit the commercial food equipment section of the NSF website.