Optimising the energy efficiency of cleanrooms is advisable from an economic, ecological and qualitative point of view. On the one hand, reducing energy consumption through technical and procedural improvements enables significant cost reductions. Cleanrooms, which require a high level of energy consumption due to their high demands on air purity, temperature and humidity control, can be made more efficient through optimisation measures such as improved airflow routing, energy-efficient filter technologies and intelligent control and regulation systems.