• The use, performance characteristics and certification of BSCs are governed by NSF International Standard 49.
  
  
• NSF International Standard 49-2002 (release in 2002) has some changes from the previous standard, NSF International Standard 49-1992 (release in 1992). A significant change involves the cabinet types. The chart below illustrates NSF International Standard 49-1992 versus NSF International Standard 49-2002 for cabinet type.

Throughout the training program the NSF49-2002 will be the primary standard.

Overview of Classes

Order of Cabinet Discussion

1. Class I
2. Class III
3. Class II overview
   1. A1
   2. A2
   3. B1
   4. B2