If efficiency has become essential for you please try to use R-422D on your system air conditioning (AC), this is the HFC refrigerant which has advantages of non-ozone-depleting designed to replace R-22, in addition to for air conditioning in the medium-temperature direct expansion (DX) is a refrigerant can also be used for refrigerators in supermarkets and water chillers.
As quoted from DuPont ™, this refrigerant to provide efficient, cost-effective retrofits - easier to retrofit than R-404A, R-507 and R-407C, non-ozone-depleting HFCs, in some trials found no change of lubricant type during retrofit required - compatible with traditional and new lubricants, do not need to replace existing equipment and 30% lower Global Warming Potential (GWP) as compared with R-404A and R-507.The performance is suitable for systems previously using R-22, with lower discharge temperatures allowing for longer compressor service life, providing up to 8% cooler and 14% efficiency compared to when using R-22 under conditions of low temperature and more than which can be submitted here.
