Close capacity match for R22 particularly at low temperature. Suitable for use in flooded systems. Use RS-44 (see below) in systems with a capillary.
"RS" Series Of Drop-In Zero Odp Refrigerants The "RS" series of refrigerants are non ozone depleting and can be used both with traditional (excluding RS-50, see below) lubricants (eg mineral and alkyl benzene oils) and the new synthetic lubricants such as polyol esters. They provide a simple and low cost method of switching away from CFCs and HCFCs including the interim ozone depleting blends. RS-50 is a new low GWP alternative to R404A and R507.