Mark W. Kohnen

About the Author

Mark W. Kohnen is a distinguished author and educator with over three decades of experience in the fields of refrigeration and air conditioning. Holding advanced degrees in mechanical engineering, he has dedicated his career to bridging the gap between theoretical knowledge and practical application in HVAC systems. Kohnen's expertise stems from his time as a lead technician and instructor at prominent technical institutes, where he developed innovative training programs that have prepared thousands of professionals for the industry. His writing demystifies complex technical concepts, making them accessible to students, apprentices, and seasoned engineers alike. Through his seminal work, Modern Refrigeration and Air Conditioning, Kohnen has become a cornerstone resource for vocational education worldwide, emphasizing safety, efficiency, and emerging technologies in sustainable cooling solutions.