What is an example of a Type III appliance?

• A. Central air conditioning unit
• B. Low pressure chiller
• C. Refrigerator
• D. Heat pump

Answer: (B)

A Type III appliance is characterized by its use of refrigerants that have a low-pressure refrigerant system. Low-pressure chillers operate specifically using refrigerants that function within a low-pressure range, making them a fitting example of this category. These chillers often use refrigerants such as ammonia or other low-pressure substances, which do not fall under the classifications used for other appliance types, such as standard air conditioning units or refrigerators.

In contrast, central air conditioning units primarily operate on high-pressure refrigerants, and refrigerators use either high or medium-pressure systems, depending on their design. Heat pumps also typically operate with high-pressure refrigerants. Thus, the specific nature of low-pressure chillers aligns them perfectly with the definition of a Type III appliance.