Which system would NOT be categorized under mechanical building systems?

The system that would not be categorized under mechanical building systems is switching and lighting controls. Mechanical systems typically refer to those systems designed to manage the movement and control of air, water, and temperature within a building environment. Heating, ventilation, air conditioning (HVAC), radiant systems, and convection systems all involve the principles of thermodynamics and fluid mechanics, focusing on temperature control and air quality, which are essential for maintaining comfort and functionality in interior spaces.

In contrast, switching and lighting controls specifically pertain to electrical systems. These systems are concerned with managing the performance of lighting fixtures and controls, rather than the mechanical aspects of air distribution or thermal comfort. Thus, they are classified under electrical systems rather than mechanical building systems. Understanding this distinction helps clarify the broader categories of building systems, facilitating better design and operational choices in the field of interior design.