What are considered the oldest type of building systems?

Heating systems are considered the oldest type of building systems because they have been essential for human habitation since ancient times. The need for warmth in living spaces led to the development of various heating methods, starting with simple fire pits and progressing to more complex systems like furnaces and boilers. The primary focus of early constructions was to provide shelter and maintain a livable environment, which is why heating systems played a crucial role in architectural design and building practices throughout history.

In contrast, electrical, plumbing, and security systems are more modern innovations. While plumbing does have ancient roots, it developed significantly later and was not as vital for survival as heating was. Electrical systems became prevalent only after the advent of electrical power during the Industrial Revolution, and security systems emerged as people began to build larger and more complex structures that required protection from theft or harm. Thus, the foundational aspect of heating systems in early architecture highlights their status as the oldest type of building systems.