At the German pump manufacturer HERMETIC, the trend towards the use of R-717and R-744 in large-scale refrigeration systems, predicted against the background of the new F-gas regulation, has been confirmed. These refrigerants have no or very low global warming potential and are not harmful to the environment if small amounts escape. However, R-717and R-744 also pose risks to humans. HERMETIC explains the associated technical challenges for refrigerant pumps and gives tips for choosing a pump. R-717 as a refrigerant is characterized not only by its environmental compatibility but also by its high level of cost-effectiveness. The reason is its good thermodynamic properties. Main disadvantage: R-717 has a pungent smell and is toxic to humans. Inhaling R-717 as a highly concentrated gas can be ...