What is considered an example of a Type III appliance?

A Type III appliance is classified as a system that contains refrigerants used for the purpose of industrial refrigeration or similar applications where the pressure is classified as low-pressure. Low-pressure chillers are designed to operate with refrigerants that fall under this category, which includes substances like R-123 or R-134a, depending on the context of the system being discussed.

In contrast, walk-in coolers and reach-in refrigerators typically fall under Type I and Type II classifications, which relate to high-pressure systems and mid-pressure systems, respectively, usually used for food preservation and commercial refrigeration. Residential comfort cooling systems usually correspond with Type I appliances, as they operate primarily in the high-pressure range with refrigerants like R-410A or R-22.

Thus, the designation of a low-pressure chiller as a Type III appliance is based on its operational characteristics and the regulatory frameworks established for different types of refrigeration systems.