In October 2019, COOLINN GmbH realised the first full-body cold chamber that reaches temperatures of down to -115 °C using only air as a refrigerant. Refolution acted as developer and project manager. The whole-body cold chamber is a two-chamber system. Thanks to the Mirai Intex technology used, the temperature inside the main room can be variably controlled between -115 °C and -20 °C. The main room is cooled using the Mirai Intex MC15 machine with air as the refrigerant. This technology makes the whole-body cold chamber not only the most efficient, safest and most environmentally friendly, but also the most future-proof whole-body cold chamber. It will not be affected by future political bans. One of the main focal points in the development of the whole-body cold chamber was a good user experience. The uniform air circulation within the COOLINN whole-body cold chamber creates a homogeneous temperature distribution from head to toe. However, the air speed is kept very low in order to provide the end customer with a particularly pleasant experience. The COOLINN temperature profile is unique on the market and provides the user with the maximum experience and the best possible cooling over the entire body. In addition to the benefits for the user, there are also many points that are important for the operator. The defrosting process of the whole-body cooling chamber is automated and can be carried out easily between customer aisles. This enables a high customer frequency. In contrast to competitor products, this means that the entire whole-body coldroom only needs to be warmed up at very long intervals. The waste heat generated is used to heat the adjoining room in winter.