The book “Handbook on ventilation” by Bogoslovsky is an indispensable resource for anyone interested in the design, installation and operation of ventilation systems. In today's world, where indoor air quality is becoming increasingly relevant, this publication is a storehouse of knowledge necessary for both professional engineers and technical students. From the first pages, the reader plunges into the world of ventilation, where the author is available and explains in detail the basic principles of ventilation systems. The book covers a wide range of topics, ranging from the basics of the theory to practical recommendations for the calculation and selection of equipment. Theologian shares his long-term knowledge and experience, which makes the material not only theoretically sound, but also practically applicable. One of the key topics raised in the book is the effect of ventilation on human health. When many of us spend most of our time indoors, air quality becomes critical. The author explains how to properly organize air exchange in order to avoid problems with allergies, respiratory diseases and other negative consequences. This information will be especially useful for architects, designers and business owners seeking to create a comfortable environment for their employees and customers. The book also addresses energy efficiency and environmental issues. In the context of global climate change and growing concerns about sustainable development, the author proposes solutions that will help reduce energy costs and minimize the impact on the environment. Readers will be able to learn about modern technologies, such as heat recovery and the use of alternative energy sources, which makes the book relevant for those who want to be at the forefront in the field of “green” construction. The Ventilation Handbook will be of interest not only to specialists, but also to a wide range of readers, including students, teachers and anyone who wants to deepen their knowledge in the field of ventilation systems. Thanks to its accessible language and clear structure, the book will be a useful guide for those who are just starting out in the field, as well as for experienced professionals who want to update their knowledge. The author's style is distinguished by clarity and logical presentation, which makes it easy to absorb complex technical aspects. Theologian is not only an author, but also a practitioner, which gives his works special value. He is also known for his other works devoted to construction and engineering, which have earned recognition among professionals. If you are looking for information about ventilation, air exchange systems design or want to improve the air quality in your home or office, the Ventilation Guide will become your reliable assistant. The book can also be useful for those who are interested in modern technologies in construction and want to follow the latest trends in the field of ecology and energy efficiency. Do not miss the opportunity to enrich your knowledge and skills with this unique guide that will help you understand the complex issues of ventilation and make your life more comfortable and safe.