The CDC Storage and Handling Toolkit, available at www.cdc.gov/vaccines/hcp/admin/storage/toolkit/storage-handling-toolkit.pdf, contains information about recommended features to look for when selecting a temperature monitoring device or storage unit. If you store Vaccines for Children (VFC) or other federally-purchased vaccines, you may contact your state immunization manager or Vaccines for Children (VFC) coordinator for additional information on their recommendations or requirements. Contact information can be found here: www.immunize.org/coordinators.
Another option is to look for units that have the NSF/ANSI 456 certification. A refrigerator or freezer that is NSF-certified for vaccine storage means the units have been tested and certified to meet the NSF/American National Standards Institute (ANSI) 456 standards for construction and performance of vaccine refrigerators and freezers used in healthcare settings where vaccines are given. These standards were developed through a collaboration with NSF, CDC, healthcare providers, public health agencies, equipment manufacturers, and vaccine manufacturers, including experts from Immunize.org.
CDC does not require NSF-certified units for vaccine storage in the Vaccines for Children program or any other federal program. Not all storage units capable of reliably storing vaccines have this certification; however, all storage unit models with this certification have met design and performance standards to properly store vaccines under a range of normal clinic conditions.