This book presents Digital Twin in clear and accessible terms, showing how it can be used to improve indoor spaces such as homes, offices, and other occupied environments. It explains how DT can support healthier, more comfortable, and more energy-efficient indoor conditions through intelligent monitoring, analysis, and control. The book provides a practical, step-by-step guide to developing and using DT systems to manage key indoor environmental factors, including air quality, temperature, lighting, and related conditions that affect human well-being and building performance. It also addresses common challenges associated with adopting this technology and offers practical ways to overcome them. A unique strength of this book is that it conceptualises and develops a holistic framework for implementing Digital Twin for IEQ management, tailored specifically to the contextual realities of developing countries. By doing so, the book moves beyond general discussion and offers a relevant and actionable pathway for application. Overall, it equips academics, professionals, decision-makers, and interested readers with the knowledge needed to adopt and benefit from DT technology in indoor environmental quality management.

Olushola Akinshipe is a construction and project management professional. He is currently a Research Fellow at the University of Johannesburg, Johannesburg, South Africa. He holds a PhD and MTech in Construction Management from UJ, and a BSc in Estate Management from the Federal University of Technology, Akure, Nigeria. He has published extensively, contributing to 35+ peer-reviewed journal articles and conference papers. His research interests include digitalisation in the built environment, facility management, indoor environmental quality (IEQ), sustainability, and construction project delivery.

Clinton Aigbavboa is a distinguished scholar with over 18 years of experience in the Built Environment and Construction sectors. He is a Professor of Sustainable Construction Digitalisation and Construction Industry Research at the University of Johannesburg. He holds a PhD in Engineering Management, a Master's in Construction Management, and certifications in Good Governance and Artificial Intelligence from MIT. He has authored over 30 research books, coauthored six edited books, and published over 1000 accredited journal articles and conference papers. His research interests include Construction 4.0, smart cities, sustainable human development, and digitalisation in construction.