Learn what happens in the duct. Understand static pressure, velocity pressure, total pressure, dynamic losses, and friction losses—in practical terms that you can use. This book will show you how duct fittings affect airflow. Read this book and you will easily understand all you need to know about airflow. A very valuable book. Very concise and clear to technician level students and a great help teaching the subject. -- Kenneth Martin, PE A very valuable book. Very concise and clear to technician level students and a great help teaching the subject. -- Kenneth Martin, PE Understanding airflow: ductwork explained....... -- SNIPS Magazine, Ed Bas, editor A very valuable book. Very concise and clear to technician level students and a great help teaching the subject. -- Kenneth Martin, PE A very valuable book. Very concise and clear to technician level students and a great help teaching the subject. -- Kenneth Martin, PE A very valuable book. Very concise and clear to technician level students and a great help teaching the subject. -- Kenneth Martin, PE A very valuable book. Very concise and clear to technician level students and a great help teaching the subject. -- Kenneth Martin, PE Leo A. Meyer Leo A. Meyer has been connected to the HVAC industry for over 50 years as a sheet metal worker, instructor, dean of instruction, teacher trainer, consultant, and writer. He has written over 50 books about the industry. He is currently Director of Training for LAMA Books/Leo A. Meyer Associates Inc., a company dedicated to HVAC training. Used Book in Good Condition