After we delivered our solutions for the production of mass concrete in winter to our customer in Patagonia in the extreme south of Argentina at the beginning of 2020, the delivery of a solution for concrete cooling followed towards the end of the year. The construction of a hydropower plant there requires the highest demands on the temperature of the mass concrete, as extreme ambient temperatures prevail and the durability of the concrete must be ensured. Not for the first time, we were able to convince the customer with our competence and the wide product range of concrete heating and cooling equipment. From a single source, we supplied and commissioned our equipment for year-round concrete production. In order to avoid thermal stress, cracking and unwanted shrinkage, a rule of thumb states that the fresh concrete temperature to be achieved should be equal to the annual average ambient temperature. In this project, the fresh concrete temperature was defined as 10 °C / 50 °F, while the ambient temperature reached 30 °C / 86 °F in summer and was below 10 °C / 50 °F in winter. The total daily production capacity was set at 3,000 m³ of concrete per day.