Refrigerants CFC-12, HCFC-22, and HFC-134A are classified as which type of substances?

• A. A1
• B. B2
• C. C3
• D. D1

Answer: (A)

CFC-12, HCFC-22, and HFC-134A are classified as A1 refrigerants because they are non-toxic and have low flammability. The classification system for refrigerants is based on their toxicity and flammability characteristics, which is important for safety during handling and use.

In this classification:

• A refers to non-toxic refrigerants.

• B refers to refrigerants that are toxic.

• The numbers indicate the level of flammability, with 1 representing the least flammable and 3 representing highly flammable substances.

Since CFC-12, HCFC-22, and HFC-134A are non-toxic and exhibit low flammability, they fall into the A1 category, emphasizing their safe application in refrigeration systems. Understanding these classifications is essential for technicians to ensure they are using refrigerants that align with safety standards in the industry.