This book is born from a three-decade career spent at the forefront of global MEP consultancy, where I have witnessed firsthand the evolution from basic code compliance to the complex, performance-driven systems required today. The transition to Net-Zero HVAC is not an option; it is the new standard of care. It requires a fundamental shift in mindset—from viewing a mechanical system as a necessary cost center to recognizing it as an essential piece of global climate infrastructure.
The goal of this guide is to provide a complete, technical, and strategic roadmap for MEP consultants, engineers, architects, and building owners. We move beyond simple "green building" principles to establish a rigorous, three-pillar strategy: Reduce the Load, Electrify the Demand, and Supply with Clean Energy. The chapters that follow are organized to be a practical, sequential blueprint, detailing everything from the crucial role of the building envelope to the complexities of AI-driven controls and global refrigerant policy.
The time for incremental change is over. The technology for a zero-carbon future in our buildings is here, and the economics, when viewed through a life-cycle lens, are compelling. This book is a call to action: to transform our systems, to guarantee their performance.
Charles Nehme is a highly respected global HVAC and MEP (Mechanical, Electrical, and Plumbing) Consultant, bringing over 30 years of extensive international experience to the field. His career spans a diverse range of applications, including complex industrial facilities, large-scale commercial developments, and intricate residential projects across various global markets.
With a profound understanding of building systems and a commitment to innovative solutions, Charles Nehme has established himself as a leading authority in ensuring optimal performance, safety, and energy efficiency in built environments worldwide. His vast expertise, honed over decades of practical application and consultancy, makes him uniquely qualified to address the critical subject of modern ventilation systems and the seamless integration of mechanical systems into the intelligent, data-driven buildings of the future.