An overview of European and international safety standards related to use of natural refrigerants as a working fluids for refrigeration and heat pump processes

Most of the natural refrigerants are related to “dangerous” fluids. The parameters of toxicity, flammability and high pressure limit their usage in industry, commercial sectors and household. This works compares requirements of European (EN) and International (ISO) standards and other issues for different types of systems and areas of installation. The focus is concentrated at important system’s design parameters, which should be taken into account