Planning and installation of reliably functioning building automation systems are complex processes that require solid knowledge and experience. Not every planner or master craftsman has access to such experience, which often leads to small errors in the design or setup of the system that can permanently restrict functionality in practice. This book aims to support practitioners in avoiding planning and installation mistakes from the outset. Based on his many years of work as a system planner and integrator, the author presents specific, recurring planning and installation errors, particularly related to KNX systems, and clearly demonstrates how they can be avoided through stringent planning. This resource is especially beneficial for practitioners who only occasionally work with KNX systems, providing insights to enhance their planning.