The book provides an overview of hybrid and mixed-mode ventilation, stressing the importance of natural ventilation for comfort and energy reduction. It highlights early integration into the design process and anticipates fully naturally ventilated buildings becoming the standard. The text acknowledges the limitations of natural ventilation alone and advocates for hybrid or mixed-mode approaches, especially in high-rise buildings.

Adaptive thermal comfort, allowing a range of temperatures, presents significant energy-saving possibilities. Designing such buildings requires a shift in thinking, blending mechanical, building physics, architectural engineering, and a new profession focused on understanding and designing with natural airflow, as outlined in the book.