"Lectures on Ventilation, Being a Course Delivered at the Franklin Institute in Philadelphia" is an important work by the American author Lewis W. Leeds. This book examines in detail the main aspects of indoor ventilation that are important for ensuring a healthy and comfortable environment. The author draws the reader's attention to the importance of proper ventilation to ensure fresh air, as well as to maintain optimal temperature and humidity. Lewis W. Leeds guides the reader through the various aspects of ventilation systems, highlighting current technologies and approaches to the subject. The book contains a clear explanation of the principles of operation of ventilation systems, practical advice on their maintenance and maintenance, as well as important instructions for ensuring the optimal level of air quality in any room. The readership appreciated this book as a valuable reference on ventilation, aimed at practitioners in the field of construction, building design and all those interested in ensuring a healthy and comfortable indoor microclimate."