**Preface to "Sustainable Building and Indoor Air Quality"**

We currently live in a global context where climate change has paved the way for the development of new initiatives to reduce carbon emissions. In light of this situation, the focus on greenhouse gas (GHG) emission management, the environmental impact of the built environment, and the optimization of environmental performance has become essential. Most energy losses are due to air renovations and infiltrations; therefore, building ventilation has become a key challenge in relation to improving energy management, because it is also closely related to human health and well-being. For this reason, it is vital that possible implementation techniques take into account the balance between indoor air quality and energy efficiency in the air renovations of buildings. Focusing on this will allow us to gain a deeper understanding of buildings' ventilation, as well as the quality of the air introduced. Original works that also deal with methodologies, numerical and experimental research, and case studies with a particular focus on the comfort conditions of the occupants and the influence of occupant habits in sustainable buildings and the effects of climate change on the built environment are welcome.

> **Roberto Alonso Gonz´alez Lezcano** *Editor*
