R32 has a number of advantages compared to R410A

such as zero ODP and less GWP value. It is now regarded as a possible substitute refrigerant for R410a. This paper presents a comprehensive review of the application of R32 on air conditioners and heat pumps by comparing both operational performances

such as the system efficiency and the requirement of refrigerant charge

between systems using R32 and R410a

and physical characteristics

such as lubrication oil preference and flammability

between both refrigerants. The comparison indicates although systems using R32 have slightly higher energy consumption and discharge temperature of compressor

it has much larger cooling capacity than that using R410a. Hence

R32 is ideal to replace R410A. However

there are still limitations for spreading the application of R32

such as the possible deterioration of system performance caused by a high compressor discharge temperature and the restriction on the refrigerant charge amount due to the A2L level flammability of R32. Nonetheless

domestic and international legislations tend to set less restriction for the application of R32. This tendency will certainly promote researches on using R32 to replace R410A in domestic air conditioner and heat pump systems.