NSF approved defined
NSF= NSF stands for National Sanitation Foundation and that organization has played key roles in developing standards, product testing methods and certification services in areas such as public health, public safety and environmental protection.
No other independent testing programs require companies to comply with the strict standards imposed by NSF and its product certification programs. From extensive product testing and material analysis to unannounced plant inspections, NSF is the only third-party testing organization to undertake a complete evaluation of every aspect of a product's development before it can earn the NSF certification.
Most importantly for you, NSF Certification is not a one-time activity. NSF does not just test a single model of a product and give it the okay. NSF certification programs require regular on-site inspections of the manufacturing facilities. In addition, certified products are periodically re-tested against the requirements of the most current version of the applicable national standard. If for any reason a product fails to meet one or more of the NSF certification criteria, NSF will take whatever enforcement actions deemed necessary to protect the public, including product recall, public notification, or de-certification.
Please note that NSF does not rate or compare the products they certify. NSF understands that each consumer has unique needs, so NSF has developed programs to verify that each product certified meets the requirements of the applicable national standard. In addition, if a performance claim is being made for a product, such as a water treatment device, NSF ensures that the product actually is able to meet that claim.
Credibility is what NSF Certification is all about.
NSF uses the terms "certified" or "listed" in connection with a product, good, component, system, material, compound or ingredient ("Product"). A Product that is certified or listed means that NSF:
(1) reviewed the Product, most often through a sampling of the Product
(2) determined at the time of the review that the Product complies with the relevant NSF consensus standard and/or protocol ("Standard")
(3) conducted or will conduct (as more specifically set forth in the Standard) periodic audits to review whether the Product continues to comply with the Standard.
After NSF certifies or lists a product, NSF authorizes the manufacturer of the Product to use the NSF Mark on or in connection with the sale, use or distribution of that Product. The NSF Mark conveys that an independent, third-party organization (NSF) has determined that the Product complies with the relevant Standard.
NOTE: From experience; most health inspectors will insist any given piece of "equipment" such as FREEZERS WILL HAVE this certification. As to avoid problems when looking to purchase a new or used freezer - Be certain to ensure the item in fact is NSF approved and has the sticker visible for the inspector to see it. Again, this sticker is often found on the data plate inside the unit on the left hand side towards the top.