John Certuse P.E.

About the Author

John Certuse P.E. is a seasoned professional engineer with over three decades of hands-on experience in the heating, ventilation, and air conditioning (HVAC) industry. Holding a Professional Engineer license, he has dedicated his career to troubleshooting complex systems, conducting forensic analyses of failures, and providing practical maintenance solutions for residential and commercial applications. As an author and educator, Certuse bridges the gap between technical theory and real-world practice, empowering HVAC technicians, engineers, and DIY enthusiasts with reliable knowledge. His work emphasizes precision, safety, and efficiency in system design and repair, drawing from extensive fieldwork and innovative tools like specialized calculators. Through his writing, he aims to demystify HVAC challenges and foster a new generation of skilled professionals in the field.