The Italian companies replaced the existing drop-in R134a unit with a CO2 one, offering up to 58% energy savings.
Emerson, Danfoss, Carel, Frascold and Energy Recovery are among those presenting their latest CO2-based products at EuroShop in Germany, February 26 to March 2.
The manufacturer aims to strengthen the development of new systems to meet stringent EU and global regulations.
Frascold parallel compressors, heat reclaim, hot-gas defrost and solar panels cut electrical costs of cold-storage facility.
Transcritical CO2, leveraging waste heat and supported by solar energy, was found to be the lowest-cost option for South Coast Stores.
The growth of CO2 transcritical in retail will continue in Europe under the F-Gas Regulation, while the US lags behind.
Italian OEM Frascold announced an expanded offering of CO2 compressors on 26 September at an event held in Henan province.