The gas cooler corresponds to a conventional condenser and cools the CO₂ refrigerant discharged from the compressor at a high pressure.

Because of this high pressure, the tubes in which refrigerant flows and the tank for distributing the refrigerant into the tubes of the gas cooler are strengthened compared to a conventional heat exchanger. Specifically, each tube is made five to 10 times stronger than a conventional tube by optimizing the hole diameter and wall thickness. The tank is reduced in size in order to decrease the area that receives high pressure, without losing the capability to uniformly distribute the refrigerant into the tubes.

In addition, the gas cooler uses a unique tank structure, which allows refrigerant to flow more efficiently in the gas cooler to exchange heat with air.