GUARANTEED COMMERCIAL SPECIFICATIONS MAIN APPLICATIONS R-134a is a hydrofluorocarbon (HFC) which can be used for domestic, commercial and industrial refrigeration as well as air conditioning, fluid cooling, and heat pump applications.  R-134a is the refrigerant of choice of many automotive and agricultural air  conditioning system manufacturers. OILS POE (Polyolester) for stationary equipment PAG (polyalkylene glycol)