Definition of air filter resistance . Methodical instructions for laboratory work”, created by the team of authors, is an indispensable resource for students, graduate students and specialists in the field of ecology, engineering and air purification technologies . This publication not only deepens the understanding of the principles of air filters, but also offers practical recommendations for laboratory research, which makes it relevant for educational institutions and scientific institutions. In today's world, where air quality is becoming an increasingly important topic, understanding the working mechanisms of air filters and their effectiveness is a key aspect for ensuring health and safety. The book covers a wide range of issues related to the determination of filter resistance, including theoretical foundations, measurement methods and analysis of the results obtained. The authors offer readers not only theoretical knowledge, but also practical skills that will help in carrying out laboratory work. This book will be especially interesting for students of technical and environmental specialties, as well as for those who work in the field of environmental protection and air purification. If you are passionate about engineering, ecology or just want to learn more about how filters work, this publication will be your reliable assistant. It is suitable for both beginners and more experienced professionals who want to deepen their knowledge in this area. The topics raised in the book go beyond the simple definition of resistance. The authors consider the influence of various factors on filtration efficiency, such as air flow rate, filter material type and operating conditions. They also discuss the importance of regular monitoring and testing of filters, which is an integral part of maintaining indoor and industrial air cleanliness. These aspects make the book relevant not only for educational purposes, but also for practical application in various industries. The style of the authors is characterized by accessibility and clarity of presentation. Each chapter is logically structured, allowing readers to easily assimilate information and put it into practice. The book is filled with illustrations and examples, which makes the study of the material more fascinating and visual. Approaches such as using real data and situations help readers better understand how theoretical knowledge is applied in real life. The team of authors working on this book consists of experienced specialists in the field of ecology and engineering, which guarantees high quality of the presented material. Their previous work has also received recognition in academia, which adds additional value to this book. Thus, "Definition of air filter resistance. Methodical instructions for laboratory work" is not just a textbook, but a whole guide to the world of filtration and air purification. The book will be a great addition to the library of anyone interested in this important topic. It will help you not only to master the theoretical aspects, but also to acquire practical skills that will be useful in your professional activities. If you are looking for literature that combines scientific rigor and practical focus, this publication will be your faithful companion in the study and application of knowledge about air filters.