The book "Pumps and fans" by Polyakov is an indispensable training manual for students and specialists in the field of heat supply and ventilation . This publication not only covers the theoretical aspects of the operation of pumps and fans, but also provides practical advice, making it a valuable resource for future engineers and practitioners. From the first pages of the book, the reader plunges into the world of mechanics and thermodynamics, studying exactly how pumps and fans work, as well as their role in heating and ventilation systems. Polyakov masterfully combines scientific concepts with practical examples, which allows the reader not only to understand the theory, but also to see how this knowledge is applied in real conditions. The book covers a wide range of topics, including the choice of equipment, its operation, as well as methods for calculating and designing systems. This makes it an ideal guide for both students and professionals looking to update their knowledge. Who can like this edition? First, it will be useful for students of technical universities studying in specialties related to heat supply and ventilation . Secondly, engineers and designers working in this field will find in the book many useful tips and recommendations that will help them in their practical activities. It may also be of interest to graduate students and teachers who are looking for quality teaching materials for their courses. The topics raised in the book are highly relevant in light of current challenges related to energy conservation and ecology. Polyakov emphasizes the importance of choosing efficient equipment, which in turn affects the overall energy efficiency of buildings and structures. In the face of global warming and growing environmental demands, knowledge of how to choose and use pumps and fans is becoming especially important. The book not only teaches technical aspects, but also raises issues of sustainable development and environmental protection. Polyakov's style is distinguished by clarity and accessibility, which makes complex technical concepts understandable even for those who are just starting their way in this area. His approach to learning is based on a combination of theory and practice, which allows the reader not only to remember the material, but also to learn how to apply it in real situations. Polyakov is also known for his other work in engineering, and his experience in writing textbooks makes this book especially valuable. If you are looking for a high-quality training manual on pumps and fans that will help you deepen your knowledge and prepare for future professional activities, Polyakov’s Pumps and Fans is exactly what you need. This edition will be your reliable companion in the world of engineering, providing all the necessary tools for successful mastering of the specialty. Do not miss the opportunity to discover the fascinating and important world of heating and ventilation with this book!