The history of HVAC has had a profound impact on the development of modern HVAC systems. The innovations and discoveries made by early pioneers, such as the Romans and Leonardo da Vinci, laid the foundation for later advancements in HVAC technology. The evolution of HVAC systems has been shaped by the need to address changing societal needs, such as the demand for comfort, energy efficiency, and indoor air quality. Today, modern HVAC systems continue to build upon the knowledge and innovations of the past, incorporating new materials, technologies, and design principles to create more efficient, sustainable, and comfortable indoor environments.