The regular (type N) is suitable for sterilizing only unwrapped and solid instruments. The major concern with the N-cycle sterilizers is the non-removal of trapped air, especially air pockets in difficult-to-access areas of the instruments during displacement. Errors in packaging or overloading the sterilizer chamber can result in cool air pockets where items are not sterilized.

The regular (type N) is suitable for sterilizing only unwrapped and solid instruments. The major concern with the N-cycle sterilizers is the non-removal of trapped air, especially air pockets in difficult-to-access areas of the instruments during displacement. Errors in packaging or overloading the sterilizer chamber can result in cool air pockets where items are not sterilized.