Which HC refrigerant is allowed for use in new domestic small appliances?

• A. R-134A
• B. R-600A
• C. R-410A
• D. R-22

Answer: (B)

The use of R-600A, also known as isobutane, is permitted in new domestic small appliances due to its low environmental impact and efficiency properties. As a hydrocarbon refrigerant, R-600A has a negligible effect on ozone depletion potential (ODP) and a very low global warming potential (GWP). This makes it an ideal choice for manufacturers seeking to comply with environmental regulations and standards aimed at reducing harmful emissions.

R-134A, while once a commonly used refrigerant, is being phased out in many applications due to its higher GWP compared to hydrocarbons. Similarly, R-410A and R-22 are not suitable for new domestic small appliances. R-410A is primarily used in residential and commercial air conditioning systems, whereas R-22 has been largely phased out due to its high ozone depletion potential and is no longer allowed in new equipment. Therefore, the focus on using R-600A for new small appliances aligns with current environmental practices and regulatory frameworks.