Carrier Transicold’s NaturaLINE® Container Units

Carrier’s NaturaLINE® unit, which uses natural refrigerant CO2, can reduce carbon dioxide emissions by up to 28 percent compared to previous units using synthetic refrigerant.

We’ve Created The Future of Container Refrigeration. Naturally.

Carrier has been a pioneer in sustainability from the very beginning. By developing the NaturaLINE unit to address the industry’s ongoing concerns about sustainability and the environment, Carrier is building on that legacy.

For container shipping, CO2 is the only refrigerant that meets all of the following criteria:

  • Global warming potential (GWP) of 1
  • Non ozone depletion potential (ODP)
  • Excellent heat transfer/heat reclaim properties
  • Classified as A1 for low toxicity and no flame propagation
  • Cost-effective, available worldwide and requires no special disposal

The NaturaLINE unit is designed to deliver energy efficiencies similar to that of our successful PrimeLINE unit while also using the natural refrigerant carbon dioxide. By using carbon dioxide (CO2), the NaturaLINE design improves upon the PrimeLINE unit’s ability to reduce carbon dioxide emissions by 28 percent compared to previous units using synthetic refrigerant.

The NaturaLINE unit includes a number of patented “firsts” for container refrigeration applications, including a multi-stage compressor, variable-speed drive, gas cooler coil, flash tank, two-speed fans, advanced operating software and zero-GWP foam insulation.

NaturaLINE technology responds to customer concerns about GWP. It’s just one more example of Carrier’s ongoing commitment to developing new technology that minimizes environmental impact while serving customer needs. And that’s what natural leadership is all about.

Refrigerants-Environmental Impact

Refrigerants-Environmental Impact
CO2 compares very favorably against the current contemporary container refrigerants, HFC-134a and HFC-404A, as well as many other refrigerants.

ASHRAE 34 Refrigerant Designations

There are other low GWP natural refrigerants, but none are as safe as CO2. Ammonia is classified as highly toxic. Hydrocarbons such as butane and propane are highly flammable. In contrast, CO2 is nonflammable and does not support combustion.


Learn more about how the NaturaLINE unit sets a new standard for sustainability in container shipping.