Hussmann’s TerraChill DX2 is a low-temperature subcritical direct expansion refrigeration solution using CO2, a naturally occurring refrigerant. Using CO2 as a refrigerant reduces the HFC charge with a minimal impact on energy efficiency to reduce the system's carbon footprint.

TerraChill DX2 is a subcritical CO2 system. Unlike CO2 secondary or liquid recirculation systems, subcritical CO2 systems use a vapor compression cycle similar to traditional direct expansion systems. Instead of condensing against ambient air or water, the CO2 condenses against a primary refrigerant such as R404a.

•  Use of a lower-cost natural refrigerant GWP of 1 vs. R404A with 3920.
•  Approximately an 80% reduction in total refrigerant cost.
•  60-70% Reduction in HFC charge.
•  All HFCs are removed from the sales area for low-temperature loads.
•  Primary HFC receivers sized for winter flooding charge.
•  50-70% reduction in HFC leak rate.
•  HFCs can only be found in the machine room and the condenser, dramatically reducing the risk of refrigerant leaks.
•  30-50% Reduction in carbon footprint.
•  Reduction in the HFC charge.
•  Lower HFC leak rates.
•  Use of CO2 as refrigerant.
•  Minimal increase in energy consumption.
•  Less copper piping required CO2 has 7x the volumetric efficiency of R404A, drastically reducing line sizing.