John Zink Hamworthy Combustion IS THE GLOBAL AUTHORITY on emissions control and clean-air combustion systems. We even wrote the book on it. Our text, The John Zink Hamworthy Combustion Handbook, has been a top-seller since 2006 and is used by industry professionals worldwide. Our research and development delivers innovative technology and hands-on solutions. And the John Zink Hamworthy Combustion Institute is recognized industry-wide as the leader in real-world training.