100 Essential HVAC Questions Answered: A Practical Guide for Technicians, Engineers, and Homeowners
About this ebook
This book was created to simplify HVAC knowledge into an easy-to-digest Question and Answer format. Instead of wading through long technical manuals, you’ll find clear explanations to the most common and essential HVAC questions — from basic principles to advanced design concepts.
The goal is not only to provide quick answers, but also to spark curiosity, build confidence, and serve as a handy reference for technicians, engineers, students, and anyone interested in HVAC. Each question reflects real-world situations: how systems work, why they fail, how to troubleshoot, and how to improve performance and efficiency.
Whether you’re preparing for exams, working on job sites, managing facilities, or simply trying to better understand the system that keeps your home or office comfortable, this book will give you the clarity you need.
By the end, you’ll see that HVAC is not just about machines — it’s about people, comfort, energy, and sustainability.
I hope this book becomes your go-to reference, whether you’re learning the basics, refreshing your knowledge, or looking for quick answers to practical problems.
— Charles Nehme
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About the author
Charles Nehme is a seasoned mechanical engineer with over 30 years of global experience in HVAC and building services. Throughout his career, he has worked on industrial, commercial, and residential projects across diverse sectors, including data centers, cleanrooms, hospitals, laboratories, hotels, and large-scale industrial facilities.
As the founder of CFN-HVAC, Charles provides worldwide consulting, technical writing, and knowledge-based services to companies, engineers, and facility managers. His expertise spans system optimization, energy efficiency, sustainable design, retrofits, and troubleshooting complex HVAC challenges.
In addition to his technical work, Charles is a prolific author and educator, publishing books and articles to make HVAC knowledge more accessible to both professionals and non-specialists. His mission is to bridge the gap between theory and practice, offering practical insights that engineers can apply on-site and homeowners can understand at home.
When he isn’t consulting or writing, Charles dedicates time to mentoring younger engineers, promoting sustainable practices, and advancing the global conversation on energy-efficient building systems.
His works are available on Amazon, Apple Books, and Google Books.
