Table 2 shows properties of R410A and R32 in typical condensing and evaporating conditions for air conditioning application. With a condensing temperature of 44ºC and an evaporating temperature of 10ºC, the latent heat of R32 is 40% to 50% respectively higher than that of R410A. Moreover, the liquid thermal conductivity of R32 is 40% higher than that of R410A at both condensing and evaporating conditions, and this would greatly enhance the heat transfer rate when using R32. However, the suction vapor density of R32 is 28% lower than that of R410A, and this leads to a decrease of the refrigerant mass flow rate. The overall effect with differences in the refrigerant density and latent heat result in an increase of 3% in the volumetric capacity comparing R32 to R410A. At the same condensing and evaporating conditions, the viscosity of R32 is typically lower than that of R410A, and this would decrease the pressure drop across heat exchangers as well.