William J. Younger

About the Author

William J. Younger is a distinguished expert in energy efficiency and sustainability, with decades of experience in auditing and consulting for commercial and industrial sectors. As the lead author of the authoritative Handbook of Energy Audits, Ninth Edition, he has guided professionals through the intricacies of energy assessment methodologies, from preliminary surveys to detailed implementation strategies. Younger's career spans engineering, environmental policy, and education, where he has trained thousands of practitioners on optimizing energy use to reduce costs and environmental impact. His practical insights, drawn from real-world projects, continue to shape industry standards, making complex technical concepts accessible to engineers, facility managers, and policymakers alike.