The process of machining metals or manufacturing electronic components creates a lot of atmospheric pollution. Room air in the buildings where these processes are performed should be replaced continually so as to protect employees from this contamination as they go about their work. Hoval indoor climate systems significantly improve air quality. Different indoor climate units can be combined to produce optimum air quality and a perfect production process environment for any field of work. Waste process heat can also serve to heat the hall during winter, thus improving energy efficiency and reducing operating costs. All in all, this is a good investment that more than pays for itself over time.