Refrigerant Services Inc RS-44RS44 / R424A is an ideal drop-in replacement of R22 in new and existing commercial or industrial air conditioning and refrigeration systems. There is no need to use expensive and hygroscopic synthetic lubricants, avoiding the risk of moisture ingress into the system. Since there is no need to change the existing lubricant, it is straightforward to use, providing both an easy and long-term solution. RS44 / R424A has a significantly lower discharge temperatures and pressures than R22, removing the problem of oil decomposition and broadening the product’s applications.