This book presents select proceedings of the 2nd Asian Conference on Indoor Environmental Quality (ACIEQ-2023) and explores the current research in the field of indoor environmental quality which includes indoor air quality, adaptive thermal comfort, productivity and health, indoor lighting, and acoustics. These themes include exposure assessment in various microenvironments, i.e., commercial, residential, and institutional and its effect on human health and performance for better well-being. The book also discusses the strategies to improve thermal and visual comfort along with filtration technologies for improving indoor air quality in urban built environment. It also emphasizes on profiling of indoor air pollutants such as bioaerosols, volatile organic compounds, particulate matter in schools, offices, dyeing/printing industry, and modes of commute. The book is a valuable reference for researchers and professionals in engineering, architecture, lighting, and acoustic areas interested in the relevant aspects of indoor environmental quality.