Thermo King has officially switched to a refrigerant with a lower global warming potential (GWP) in all its new truck and trailer units.

The standard refrigerant halves the carbon footprint of previous formulas.

The next generation of Thermo King’s Precedent trailer portfolio will shift to the lower-GWP R452A refrigerant this month, and truck products will come standard with the new refrigerant midway through the year. New units will no longer use R404A.

Thermo King has been using R452A in select North American products for several years.

The change comes a year ahead of a California Air Resources Board (CARB) rule that will require transport refrigeration units to use refrigerants with a GWP of 2200 or less.

“Our company’s entire strategy is centered on sustainability, and we are committed to delivering innovative solutions to customers that create value for their operations and are better for the planet,” said Karin De Bondt, president of Thermo King Americas. “The enhancements to our trailer and truck units are important to decarbonizing the refrigerated fleets that deliver life-sustaining cargo, including foods and medicines, to people around the world.”