Final answer:
Type I 'Small appliance,' as defined by the EPA, refers to systems manufactured, charged, and hermetically sealed with five pounds or less of refrigerant.
Step-by-step explanation:
The correct definition of Type I 'Small appliance,' as defined by the Environmental Protection Agency (EPA), is a system manufactured, charged, and hermetically sealed with five (5) pounds or less of refrigerant. Therefore, the best description among the provided options is: 'Systems manufactured, charged, and hermetically sealed with five (5) pounds or less of refrigerant.' This definition encompasses various common household and commercial appliances such as refrigerators and window air conditioners, which typically contain a relatively small quantity of refrigerant.