What type of refrigerant class is generally associated with lower ODP?

• A. Class 1
• B. Class 2
• C. Class 3
• D. Class 4

Answer: (B)

The classification of refrigerants is primarily based on their potential to deplete the ozone layer, known as the Ozone Depletion Potential (ODP). Class 2 refrigerants are characterized by having lower ODP values compared to Class 1 refrigerants. Class 1 refrigerants are typically those that have higher ODP values, meaning they contribute significantly to ozone layer depletion.

As environmental regulations have evolved, there has been a shift towards using refrigerants that fall into Class 2 and beyond, as these are designed to minimize their impact on the ozone layer. Therefore, Class 2 refrigerants are more environmentally friendly alternatives.

Class 3 and Class 4 refrigerants include more specialized compounds, but they can also have varied ODP ratings. However, the defining characteristic of Class 2 is that it encompasses refrigerants that are specifically engineered to have lower environmental impact in terms of ozone depletion, making this classification the correct choice.