**4. Conclusions**

This chapter briefly discusses the importance of heat exchangers and their advanced appli‐ cations in terms of energy efficiency and process intensification, minimizing environmental and societal impacts. It highlights main research and findings from each contributed chapter of this book. It also provides key topics related to advanced features and applications of heat exchangers and corresponding reference sources. We believe that this book will be a useful reference source of information on advanced features and applications of heat exchangers.
