The first and only technology of its kind, the NaturaLINE reefer unit incorporates CO2 in place of conventional synthetic refrigerants to deliver sustainability and efficiency equal to our best-in-class performer. This natural refrigerant-based solution is the most environmentally sustainable alternative for refrigerated marine transport. It’s the future of container refrigeration – brought to you by the natural Leaders at Carrier. The NaturaLINE unit has been validated by UL Environment as having a 95 percent recyclability rate, joining Carrier’s PrimeLINE® unit as the only container refrigeration units to achieve recyclability validation.