National Refrigerants, Inc. (NRI) is a worldwide refrigerant distributor that offers the widest selection of refrigerant products, including refrigerant oil, propylene glycol, HFCs, HCFCs, CFCs, Hydrocarbons and HFOs. Refrigerant management services: refrigerant reclaim, cylinder refurbishing, refrigerant banking, AHRI certified labortory for testing and technical support.