This book presents building management system hardware by explaining the controller hardware and commonly used field devices. Building upon first principles of electrical, electronic, control theory, psychrometrics, networks and field devices, the reader gains knowledge required to specify, design, install, commission or troubleshoot a building management system. The engineering mathematics included in this book with worked examples provides the reader with the knowledge required to execute the design, installation, commissioning or troubleshooting of these systems.Aimed at engineers of all levels wishing to understand building management systems and the hardware components. The main properties of air and water are discussed to allow the user a greater understanding of sensor selection as well as considerations for installing such devices. There is a complete chapter on networks and associated standards, as well as the protocols, run on these networks. Troubleshooting tips provided will be of great help for any engineering experiencing issues with these networks. The design calculations allow the designs of these systems to ensure they to do not overload the system, causing the end-user to have poor system response.Robert O'Connor is a Chartered Engineer and Certified Energy Manager with over 20 years experience in the industry. He has worked as on all sides of the building management system industry, both in Ireland and across Europe. Starting in the field of Instrumentation and having worked on installing, commissioning and troubleshooting building management system as well a consulting engineer. Robert has experience designing building management systems across a range of industries from data centres, healthcare, pharmaceutical, educational and general-purpose buildings.